10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

 ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2022

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from   to

Commission file number 001-39291

EOS ENERGY ENTERPRISES, INC.

(Exact name of registrant as specified in its charter)

Delaware			84-4290188
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)
3920 Park Avenue	Edison	NJ	08820
(Address of Principal Executive Offices)			(Zip Code)

(732) 225-8400

Registrant's telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.0001 per share	EOSE	The Nasdaq Stock Market LLC
Warrants, each exercisable for one share of common stock	EOSEW	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports); and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes  ☒  No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).     Yes   ☐     No  ☒

The registrant had outstanding 59,650,960 shares of common stock as of July 27, 2022.

Table of Contents

		Page
	PART I - FINANCIAL INFORMATION
Item 1.	Financial Statements	2
	Condensed Consolidated Balance Sheets as of June 30, 2022 (Unaudited) and December 31, 2021	2
	Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three and Six Months Ended June 30, 2022 (Unaudited) and 2021 (Unaudited)	4
	Condensed Consolidated Statements of Shareholders’ Equity (Deficit) for the Three and Six Months Ended June 30, 2022 (Unaudited) and 2021 (Unaudited)	5
	Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2022 (Unaudited) and 2021 (Unaudited)	7
	Notes to Unaudited Condensed Consolidated Financial Statements	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	42
Item 4.	Controls and Procedures	43
	PART II - OTHER INFORMATION
Item 1.	Legal Proceedings	43
Item 1a.	Risk Factors	43
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.	Defaults Upon Senior Securities	44
Item 4.	Mine Safety Disclosures	44
Item 5.	Other Information	44
Item 6.	Exhibits	45
Signatures		47

1

Part I - Financial Information

EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

	June 30, 2022		December 31, 2021
ASSETS
Current assets:
Cash and cash equivalents	$	16,273	$	104,831
Restricted cash	1,255		861
Accounts receivable, net	2,596		1,916
Inventory, net	12,941		12,976
Vendor deposits	22,961		16,653
Notes receivable, net	115		103
Prepaid expenses	1,767		2,595
Other current assets	2,548		2,637
Total current assets	60,456		142,572
Property, plant and equipment, net	20,992		12,890
Intangible assets, net	260		280
Goodwill	4,331		4,331
Security deposits, net	1,226		1,239
Notes receivable, long-term, net	3,740		3,547
Operating lease right-of-use asset, net	4,772		3,468
Other assets, net	1,963		848
Total assets	$	97,740	$	169,175
LIABILITIES
Current liabilities:
Accounts payable	$	29,088	$	12,531
Accrued expenses	14,689		7,674
Accounts payable and accrued expenses - related parties	—		1,200
Operating lease liability, current portion	1,013		1,084
Note payable, current portion	4,839		4,926
Long-term debt, current portion	1,765		1,644
Convertible note payable, current portion - related party	7,333		—
Contract liabilities, current portion	879		849
Other current liabilities	13		9
Total current liabilities	59,619		29,917
Long-term liabilities:
Operating lease liability, long-term	4,705		3,224
Note payable, excluding current portion	9,177		13,769
Long-term debt, excluding current portion	3,816		4,727
Convertible notes payable - related party	77,205		84,148
Contract liabilities, long-term	876		—
Warrants liability - related party	89		926
Other liabilities	82		17
Total long-term liabilities	95,950		106,811
Total liabilities	155,569		136,728

2

EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

	June 30, 2022		December 31, 2021
COMMITMENTS AND CONTINGENCIES (NOTE 9)
SHAREHOLDERS' EQUITY (DEFICIT)
Common Stock, $0.0001 par value, 300,000,000 and 200,000,000 shares authorized, 58,519,739 and 53,786,632 shares outstanding at June 30, 2022 and December 31, 2021, respectively	6		5
Preferred stock, $0.0001 par value, 1,000,000 shares authorized, no shares outstanding at June 30, 2022 and December 31, 2021	—		—
Additional paid in capital	461,165		448,969
Accumulated deficit	(519,005)		(416,527)
Accumulated other comprehensive income	5		—
Total shareholders' equity (deficit)	(57,829)		32,447
Total liabilities and shareholders' equity (deficit)	$	97,740	$	169,175

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

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EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except share and per share amounts)

For the three and six months ended June 30, 2022 and 2021

	Three Months Ended				Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Revenue
Total revenue	$	5,895	$	612	$	9,193	$	776
Costs and expenses
Cost of goods sold	36,866		12,364		72,443		12,453
Research and development expenses	5,464		3,647		10,427		8,700
Selling, general and administrative expenses	19,115		11,325		33,394		20,127
Loss on pre-existing agreement	—		22,516		—		30,368
Loss from write-down of property, plant and equipment	1,997		—		2,005		11
Grant (income) expense, net	(169)		(52)		4		(44)
Total costs and expenses	63,273		49,800		118,273		71,615
Operating loss	(57,378)		(49,188)		(109,080)		(70,839)
Other income (expense)
Interest expense, net	(284)		(154)		(622)		(175)
Interest expense - related party	(2,664)		—		(4,838)		—
Remeasurement of equity method investment	—		(7,480)		—		(7,480)
Change in fair value, embedded derivative - related party	3,978		—		11,673		—
Change in fair value, warrants liability - related party	270		585		837		361
Income from equity in unconsolidated joint venture	—		—		—		440
Sale of state tax attributes	—		2,194		—		2,194
Other income (expense)	(632)		—		(513)		—
Loss before income taxes	$	(56,710)	$	(54,043)	$	(102,543)	$	(75,499)
Income tax benefit	23		—		65		—
Net loss	$	(56,687)	$	(54,043)	$	(102,478)	$	(75,499)
Other comprehensive income
Foreign currency translation adjustment, net of tax	5		—		5		—
Comprehensive loss	$	(56,682)	$	(54,043)	$	(102,473)	$	(75,499)
Basic and diluted loss per share attributable to common shareholders
Basic	$	(1.01)	$	(1.04)	$	(1.86)	$	(1.46)
Diluted	$	(1.01)	$	(1.04)	$	(1.86)	$	(1.46)
Weighted average shares of common stock
Basic	56,021,185		51,792,365		54,991,475		51,630,088
Diluted	56,021,185		51,792,365		54,991,475		51,630,088

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

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EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT)

(In thousands, except share and per share amounts)

For the three months ended June 30, 2022 and 2021

	Common Stock			Additional Paid in capital		Contingently Issuable Common Stock		Accumulated Other Comprehensive Income		Accumulated Deficit		Total
	Shares	Amount
Balance at March 31, 2021	51,801,267	$	5	$	415,569	$	—	$	—	$	(313,767)	$	101,807
Stock-based compensation	—	—		3,195		—		—		—		3,195
Exercise of stock options	87,177	—		756		—		—		—		756
Exercise of warrants	1,465,414	—		16,852		—		—		—		16,852
Net loss	—	—		—		—		—		(54,043)		(54,043)
Balance at June 30, 2021	53,353,858	$	5	$	436,372	$	—	$	—	$	(367,810)	$	68,567
Balance at March 31, 2022	53,980,608	$	5	$	452,093	$	—	$	—	$	(462,318)	$	(10,220)
Stock-based compensation	—	—		3,434		—		—		—		3,434
Release of restricted stock units	121,956	—		—		—		—		—		—
Cancellation of shares used to settle payroll tax withholding	(15,881)	—		(26)		—		—		—		(26)
Issuance of common stock under SEPA	3,967,939	1		4,603		—		—		—		4,604
Commitment fee for SEPA settled by common stock	465,117	—		1,061		—		—		—		1,061
Foreign currency translation adjustment	—	—		—		—		5		—		5
Net loss	—	—		—		—		—		(56,687)		(56,687)
Balance at June 30, 2022	58,519,739	$	6	$	461,165	$	—	$	5	$	(519,005)	$	(57,829)

5

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EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT)

(In thousands, except share and per share amounts)

For the six months ended June 30, 2022 and 2021

	Common Stock			Additional Paid in capital		Contingently Issuable Common Stock		Accumulated Other Comprehensive Income		Accumulated Deficit		Total
	Shares	Amount
Balance at December 31, 2020	48,943,082	$	5	$	395,491	$	17,600	$	—	$	(292,311)	$	120,785
Stock-based compensation	—	—		5,673		—		—		—		5,673
Release of Block B Sponsor Earnout Shares from restriction	859,000	—		—		—		—		—		—
Issuance of Contingently Issuable Common Stock	1,999,185			17,600		(17,600)		—		—		—
Exercise of stock options	87,177	—		756		—		—		—		756
Exercise of warrants	1,465,414	—		16,852		—		—		—		16,852
Net loss	—	—		—		—		—		(75,499)		(75,499)
Balance at June 30, 2021	53,353,858	$	5	$	436,372	$	—	$	—	$	(367,810)	$	68,567
Balance at December 31, 2021	53,786,632	$	5	$	448,969	$	—	$	—	$	(416,527)	$	32,447
Stock-based compensation	—	—		7,377		—		—		—		7,377
Exercise of warrants	600	—		7		—		—		—		7
Release of restricted stock units	427,607	—		—		—		—		—		—
Cancellation of shares used to settle payroll tax withholding	(128,156)	—		(852)		—		—		—		(852)
Issuance of common stock under SEPA	3,967,939	1		4,603		—		—		—		4,604
Commitment fee for SEPA settled by common stock	465,117	—		1,061		—		—		—		1,061
Foreign currency translation adjustment	—	—		—		—		5		—		5
Net loss	—	—		—		—		—		(102,478)		(102,478)
Balance at June 30, 2022	58,519,739	$	6	$	461,165	$	—	$	5	$	(519,005)	$	(57,829)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands, except share and per share amounts)

For the six months ended June 30, 2022 and 2021

	June 30, 2022		June 30, 2021
Cash flows from operating activities
Net loss	$	(102,478)	$	(75,499)
Adjustment to reconcile net loss to net cash used in operating activities
Stock-based compensation	7,377		5,673
Depreciation and amortization	2,266		1,097
Loss from write-down of property, plant and equipment	2,005		11
Non-cash lease expense	409		396
Income from equity in unconsolidated joint venture	—		(440)
Remeasurement of equity method investment	—		7,480
Accreted interest on convertible notes payable - related party	1,548		—
Amortization of debt issuance cost- related party	204		—
Commitment fee for SEPA agreement settled by common stock- related party	1,061		—
Change in fair value, embedded derivative - related party	(11,673)		—
Change in fair value, warrants liability - related party	(837)		(361)
Changes in operating assets and liabilities:
Prepaid expenses	827		761
Inventory	35		(1,554)
Accounts receivable	(686)		(170)
Vendor deposits	(5,268)		(3,221)
Security deposits	13		(15)
Accounts payable	14,734		2,380
Accrued expenses	7,020		1,540
Accounts payable and accrued expenses - related parties	(1,200)		(2,517)
Provision for firm purchase commitments	—		(3,445)
Operating lease liabilities	(303)		(374)
Contract liabilities	906		1,263
Note payable	(4,679)		18,365
Other customer receivable	—		—
Other	1,727		(257)
Net cash used in operating activities	(86,992)		(48,887)
Cash flows from investing activities
Investment in notes receivable	(261)		(4,083)
Business acquisition, net of cash acquired	—		(160)
Investment in joint venture	—		(4,000)
Purchases of property, plant and equipment	(11,497)		(7,541)
Net cash used in investing activities	(11,758)		(15,784)

7

EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands, except share and per share amounts)

For the six months ended June 30, 2022 and 2021

	June 30, 2022		June 30, 2021
Cash flows from financing activities
Principal payments on finance (capital) lease obligations	(6)		(6)
Proceeds from exercise of stock options	—		756
Proceeds from exercise of public warrants	7		16,852
Proceeds from issuance of convertible notes - related party, net of issuance cost	7,225		—
Issuance of common stock under the SEPA	5,000		—
Repurchase of shares from employees for income tax withholding purposes	(852)		—
Repayment of other financing	—		(94)
Repayment of equipment financing facility	(790)		—
Net cash provided by financing activities	10,584		17,508
Effect of exchange rate changes on cash and cash equivalents	2		—
Net decrease in cash, cash equivalents and restricted cash	(88,164)		(47,163)
Cash, cash equivalents and restricted cash, beginning of the period	105,692		121,853
Cash, cash equivalents and restricted cash, end of the period	$	17,528	$	74,690
Non-cash investing and financing activities
Accrued and unpaid capital expenditures	$	2,402	$	—
Issuance of convertible notes for interest paid in kind	3,087		—
Fixed assets acquired with finance lease	70		—
Right-of-use operating lease assets in exchange for lease liabilities	$	2,112	$	4,351
Supplemental disclosures
Cash paid for interest	$	434	$	233

The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the condensed consolidated balance sheets.

	June 30, 2022		June 30, 2021
Cash and cash equivalents	$	16,273	$	74,690
Restricted cash	1,255		—
Total cash, cash equivalents and restricted cash	$	17,528	$	74,690

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

8

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

1.Nature of Operations and Summary of Significant Accounting Policies

Nature of Operations

Eos Energy Enterprises, Inc. (the “Company” or "Eos") designs, develops, manufactures, and sells innovative energy storage solutions for utility-scale microgrid, and commercial & industrial (“C&I”) applications. Eos has developed a broad range of intellectual property with multiple patents ranging from the unique battery chemistry, mechanical product design, energy block configuration and software operating system (Battery Management System). The Battery Management System (“BMS”) software uses proprietary Eos-developed algorithms and includes ambient and battery temperature sensors, as well as voltage and electrical current sensors for the strings and the system. Eos focuses on developing and selling safe, reliable, long-lasting and low-cost turn-key alternating current (“AC”) integrated systems using Eos’ direct current (“DC”) battery energy storage system. The Company has a manufacturing facility in Turtle Creek, Pennsylvania to produce DC energy blocks with an integrated BMS. The Company’s primary applications focus on integrating battery storage solutions with: (1) renewable energy systems that are connected to the utility power grid; (2) renewable energy systems that are not connected to the utility power grid; (3) energy systems utilized to relieve congestion; and (4) storage systems to assist C&I customers in reducing their peak energy usage or participating in the utilities ancillary and demand response markets. The Company’s major market is North America with opportunistic growth opportunities in Europe, Oceania, Africa, and Asia.

Unless the context otherwise requires, the use of the terms “Eos”, “the Company”, “we,” “us,” and “our” in these notes to the unaudited condensed consolidated financial statements refers to Eos Energy Enterprises, Inc. and its consolidated subsidiaries.

Liquidity and Going Concern

The Company continues to rapidly scale its operations, including deploying capital for capacity expansion to meet the current demand from customers. To date, the Company has had limited revenue generating activities. Accordingly, the Company has incurred significant recurring losses and net operating cash outflows from operations. Operating expenses consist primarily of costs related to the Company’s sales of its battery energy storage system and related services, research and development costs and recurring general and administrative expenses. Management and the Company’s Board of Directors expect the Company will eventually reach a scale of profitability through the sale of battery energy storage systems and other complementary products and services, and therefore, the Company believes the current stage of the Company’s lifecycle justifies continued intensive investment in the development and launch of products. Accordingly, the Company expects to continue to incur significant losses and net operating cash outflows from operations for the foreseeable future and to continue to require additional capital to fund the Company’s operations and obligations as they become due, including funding that is necessary to continue to scale up the Company’s operations to allow for the delivery of order backlog, to secure additional order opportunities for its battery storage systems, and to continue to invest in research and development.

As of June 30, 2022, the Company had total assets of $97,740, which includes total cash and cash equivalents of $16,273, total liabilities of $155,569, which includes the total amounts owed on the Company’s outstanding convertible notes payable of $84,538 (see Note 14), notes payable of $14,016 (see Note 15) and long-term debt of $5,581 (see Note 16) and a total accumulated deficit of $(519,005), which is primarily attributable to the significant recurring losses the Company has accumulated since inception. The Company has historically relied on outside capital to fund its cost structure and expects this reliance to continue for the foreseeable future until the Company reaches profitability through its planned revenue generating activities. However, as of the date the accompanying condensed consolidated financial statements were issued, management concluded that the Company did not have sufficient capital on hand to support its current cost structure for one year after the date the accompanying condensed consolidated financial statements were issued.

9

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

1.Nature of Operations and Summary of Significant Accounting Policies (cont.)

As previously disclosed, the Company continues its efforts to secure additional financing. In July 2022, the Company secured an $85,106 senior secured term loan credit agreement to fund the Company’s manufacturing capacity, repay an existing outstanding note, and for general corporate purposes. Based on the Company’s current financial projections, which are consistent with previous assessments, the Company will continue to seek additional capital to fund its operations or defer or reduce cash expenditures in the second half of 2022 to continue our operations.

The Company believes these uncertainties raise substantial doubt about the Company’s ability to continue as a going concern. If the Company is unable to raise additional capital, on acceptable terms, or at all, the Company may have to significantly delay, scale back or ultimately discontinue the development or commercialization of its product and/or consider a sale or other strategic transaction. The Company continues to pursue various funding options to raise additional capital to support its operations. As previously reported, the Company has moved through Part I of the application under the U.S. Department of Energy’s Loan Guarantee Solicitation for Applications for Renewable Energy Projects and Efficient Energy Projects (the “DOE Loan Program”), and submitted an application under Part II of the loan program in May 2022. In addition, on April 28, 2022, the Company entered into a $200,000 common stock standby equity purchase agreement (the “Original SEPA”) with an affiliate of Yorkville Advisors (“Yorkville”), which was subsequently amended on June 13, 2022 (the “Amendment” and, together with the Original SEPA, the “SEPA”) (see Note 12). There can be no assurance that the Company will successfully complete Part II of the DOE Loan Program or that the Company will be able to utilize the SEPA to its full $200,000 capacity, or otherwise be able to obtain new funding from other sources on terms acceptable to us, on a timely basis, or at all.

The accompanying condensed consolidated financial statements have been prepared on the basis that we will continue to operate as a going-concern, which contemplates we will be able to realize assets and settle liabilities and commitments in the normal course of business for the foreseeable future. The accompanying condensed consolidated financial statements do not include any adjustments that may result from the outcome of these uncertainties.

Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts of the Company and its 100% owned, direct and indirect subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). All intercompany transactions and balances have been eliminated in the preparation of the condensed consolidated financial statements. These statements reflect all adjustments, consisting of normal recurring adjustments, which, in the opinion of management, are necessary for fair presentation of the information contained therein. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. These interim results are not necessarily indicative of results for the full year.

Reclassification of Prior Year Presentation

Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations.

Foreign Currency Translation

10

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

1.Nature of Operations and Summary of Significant Accounting Policies (cont.)

We follow the provisions of ASC 830, Foreign Currency Matters. Our foreign subsidiaries use the local currency of their respective countries as their functional currency. The assets and liabilities of foreign operations are translated at the exchange rates in effect at the balance sheet date. The operating results of foreign operations are translated at weighted average exchange rates. The related translation gains or losses are reported as a separate component of shareholders’ equity (deficit) in accumulated other comprehensive loss. Gains and losses from foreign currency transactions, which were insignificant for the three and six months ended June 30, 2022 and 2021, are included as other income (expense) in the condensed consolidated statements of operations and comprehensive loss.

Recently Adopted Accounting Pronouncements

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), using the transition method introduced by ASU 2018-11, which does not require revisions to comparative periods. The adoption of the new standard resulted in the recording of lease assets and lease liabilities of $3,662 and $4,465, respectively, as of January 1, 2021. The difference between the lease assets and lease liabilities primarily relates to deferred rent recorded in accordance with the previous leasing guidance. The new standard did not materially impact our condensed consolidated statements of operations or statements of cash flows.

On January 1, 2021, the Company adopted ASU No. 2016-13, Financial Instruments-Credit Losses (“Topic 326”), and the subsequent amendments. The standard sets forth an expected credit loss model which requires the measurement of expected credit losses for financial instruments based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost, and certain off-balance sheet credit exposures. The adoption of this standard did not have a material impact on our condensed consolidated financial statements.

Recent Accounting Pronouncements

As of June 30, 2022, the Company implemented all applicable new accounting standards and updates issued by the Financial Accounting Standards Board (“FASB”) that were in effect. There were no new standards or updates adopted during the six months ended June 30, 2022 that had a material impact on our condensed consolidated financial statements.

2. Acquisition

As previously reported, on April 8, 2021, the Company entered into a unit purchase agreement (the “Purchase Agreement”) with Holtec Power, Inc. (“Holtec”), in accordance with the terms and conditions of which the Company purchased from Holtec the remaining 51% interest in HI-POWER, LLC (“Hi-Power”) that was not already owned by the Company. Hi-Power was incorporated as a joint venture between the Company and Holtec in 2019 (see Note 7). In connection with the transaction, the Company also entered into a transition services agreement and a sublease with Holtec. The transaction closed on April 9, 2021 (“Acquisition Date”). Following the consummation of the transactions set forth in the Purchase Agreement (the “Transactions”), Hi-Power became a 100% indirect, wholly-owned subsidiary of the Company and the obligations of the parties under the Hi-Power joint venture terminated.

The Purchase Agreement provided that the Company pay an aggregate purchase price of $25,000 for Holtec’s 51% interest in Hi-Power, pursuant to the following schedule: $5,000 on each of May 31, 2021, May 31, 2022, May 31, 2023, May 31, 2024, and May 31, 2025, evidenced by a secured promissory note secured by the assets of the Company. The Purchase Agreement also required that the Company pay to Holtec, on the closing of the Transactions, an amount in cash equal to $10,283. Payments to Holtec under this Purchase Agreement totaled $35,283. The fair value of these payments was $33,474 at the Acquisition Date and included $32,750 allocated to the termination of a pre-existing agreement with Holtec and $724 allocated to the acquisition.

11

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

2. Acquisition (cont.)

The obligations and rights of both parties under the pre-existing Joint Venture Agreement were terminated at the time of acquisition and $32,750 of the fair value of the consideration transferred was allocated to the termination of the agreement, which resulted in a loss on the pre-existing agreement of $22,516 and $30,368 for the three and six months ended June 30, 2021, respectively. The Company paid $10,283 on the date of closing and $5,000 on each of May 31, 2021 and May 31, 2022. The present value of the remaining obligation was recorded as debt, which includes a current portion of $4,839 and a long-term portion of $9,177 as of June 30, 2022.

Prior to the acquisition of the remaining 51% ownership interest in Hi-Power, the Company accounted for its initial 49% ownership interest in Hi-Power as an unconsolidated joint venture under the equity method of accounting (see Note 7). In connection with the acquisition of the remaining 51% ownership interest in Hi-Power, the Company’s condensed consolidated financial statements include all of the accounts of Hi-Power, and all intercompany balances and transactions have been eliminated in consolidation. The results of operations of Hi-Power have been included in the Company’s condensed consolidated financial statements since the date of acquisition.

The consideration transferred for the 100% ownership interest in connection with the acquisition, net of intercompany balances between the Company and Hi-Power, totaled $418, of which $205 represents the fair value of the Company’s previously held 49% ownership interest in Hi-Power. In accordance with Accounting Standards Codification (“ASC”) 805, Business Combinations, we remeasured the previously held 49% ownership interest in Hi-Power at its acquisition date fair value. As of the acquisition date, a loss of $7,480 was recognized in earnings for the remeasurement of the previously held 49% ownership interest.

The following table summarizes the final allocation of the purchase price to the fair values of the assets acquired and liabilities assumed as of the Acquisition Date.

	Amount
Inventory	$	2,666
Vendor deposits	818
Property, plant and equipment, net	74
Goodwill	4,331
Accounts payable and accrued expenses	(3,634)
Provision for firm purchase commitments	(3,890)
Net assets acquired, net of cash and cash equivalents of $53 1	$	365

The Company expects the goodwill recognized as part of the acquisition will be deductible for U.S. income tax purposes. The Company also incurred insignificant non-consideration acquisition expenses including legal and accounting services related to the acquisition, which are recorded in selling, general and administrative expenses on the Company’s condensed consolidated statements of operations.

3. Revenue Recognition

The Company primarily earns revenue from sales of its energy storage systems and services including installation, commissioning, and extended warranty services. Product revenues, which are recognized at a point in time, and service revenues, which are recognized over time, are as follows:

1 Net assets acquired exclude the intercompany balance between Eos and Hi-Power and cash acquired.

12

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

3. Revenue Recognition (cont.)

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Product revenue	$	5,771	$	599	$	9,065	$	763
Service revenue	124		13		128		13
Total	$	5,895	$	612	$	9,193	$	776

For contracts for which revenue is recognized over time, the Company performs reviews of the progress and execution of its performance obligations under these contracts periodically. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities and the related changes in estimates of revenues and costs. Based upon these reviews, if at any time management determines that in the case of a particular contract total costs will exceed total contract revenue, a provision for the entire anticipated contract loss is recorded at that time. The Company recognized losses from contracts of $1,249 for the three and six months ended June 30, 2022, respectively. No loss was recognized for the three and six months ended June 30, 2021.

For the three months ended June 30, 2022, we had one customer who accounted for 89.6% of the total revenue and for the six months ended June 30, 2022, we had two customers who accounted for 73.1% and 12.7% of the total revenue, respectively.

For the three months ended June 30, 2021, we had one customer who accounted for 100% of the total revenue and for the six months ended June 30, 2021, we had two customers who accounted for 78.8% and 21.2% of the total revenue, respectively.

Contract assets and Contract liabilities

The following table provides information about contract assets and contract liabilities from contracts with customers. Contract assets are included in other current assets and contract liabilities are included separately on the condensed consolidated balance sheets.

	June 30, 2022		December 31, 2021
Contract assets	$	938	$	1,369
Contract liabilities	$	1,755	$	849

The Company recognizes contract assets for certain contracts in which revenue recognition performance obligations have been satisfied, however, invoicing to the customer has not yet occurred. Contract liabilities primarily relate to advance consideration received from customers in advance of the Company’s satisfying performance obligations under contractual arrangements. Contract balances are reported in a net contract asset or liability position on a contract-by-contract basis at the end of each reporting period.

Contract assets decreased by $431 during the six months ended June 30, 2022 due to reclassifications to accounts receivable from billings on existing contracts. Contract liabilities increased by $906 during the six months ended June 30, 2022, reflecting $1,159 in customer billings, which were not recognized as revenue during the period, offset by the recognition of $253 of revenue during the six months ended June 30, 2022 that was included in the contract liability balance at the beginning of the period.

Contract liabilities of $879 as of June 30, 2022 are expected to be recognized within the next twelve months. $876 of long-term contract liabilities are expected to be recognized as revenue over approximately the next two years.

13

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

4. Inventory

The following table provides information about inventory balances:

	June 30, 2022		December 31, 2021
Raw materials	$	12,429	$	11,898
Work-in-process	167		43
Finished goods	345		1,035
Total Inventory, net	$	12,941	$	12,976

5. Property, Plant and Equipment, Net

As of June 30, 2022 and December 31, 2021, property, plant and equipment, net consisted of the following:

	2022		2021		Useful lives
Equipment	$	20,071	$	13,489	3	—	10 years
Finance lease	296		226		5 years
Furniture	1,396		808		5	—	10 years
Leasehold Improvements	4,114		2,933		Lesser of useful life/remaining lease
Tooling	3,385		3,053		2	—	3 years
Total	29,262		20,509
Less: Accumulated Depreciation	(8,270)		(7,619)
Total Property, Plant and Equipment, net	$	20,992	$	12,890

Depreciation and amortization expense related to property, plant and equipment was $1,261 and $602 for the three months ended June 30, 2022 and 2021, respectively, and $2,246 and $1,077 for the six months ended June 30, 2022 and 2021, respectively.

For the three and six months ended June 30, 2022, the Company recorded a loss from write-down of property, plant and equipment of $1,997 and $2,005, respectively. For the three and six months ended June 30, 2021, the loss from write-down of property, plant and equipment was $— and $11, respectively.

6. Intangible Assets

Intangible assets consist of various patents valued at $400, which represents the cost to acquire the patents. These patents are determined to have useful lives and are amortized into the results of operations over ten years. The company recorded amortization expense of $10 for each period for the three months ended June 30, 2022 and 2021, respectively, and $20 for each period for the six months ended June 30, 2022 and 2021 related to patents, respectively.

Estimated future amortization expense of intangible assets as of June 30, 2022 are as follows:

Remainder of 2022	$	20
2023	40
2024	40
2025	40
2026	40
Thereafter	80
Total	$	260

14

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EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

7. Investment in Unconsolidated Joint Venture

In August 2019, the Company entered into an agreement with Holtec to form the unconsolidated joint venture HI-POWER LLC (“Hi-Power” or “JV”). The JV was formed in order to manufacture the Company’s products for its projects in North America. Accordingly, the Company had purchased battery energy storage systems and spare parts from the JV. The facility is located in Turtle Creek, Pennsylvania. The Company’s financial commitment to the JV upon inception was $4,100 in the form of a combination of cash and special purpose manufacturing equipment. The Company’s initial ownership interest was 49%. On April 9, 2021, the Company acquired the remaining 51% ownership interest and Hi-Power became a wholly-owned subsidiary thereafter. Refer to Note 2 for the acquisition details.

For the three and six months ended June 30, 2021, contributions made to the JV were $— and $4,000, respectively. The investment income recognized from the unconsolidated joint venture under the equity method of accounting was $— and $440 for the three and six months ended June 30, 2021, respectively.

8. Notes Receivable, Net and Variable Interest Entities (“VIEs”) Consideration

Notes receivable consist primarily of amounts due to us related to the financing we offered to customers. We report notes receivable at the principal balance outstanding less an allowance for losses. The estimate of credit losses is based on historical trends, customers’ financial condition and current economic trends, all of which are subject to change. We charge interest at a fixed rate and interest income is calculated by applying the effective rate to the outstanding principal balance.

The Company had notes receivable of $3,855 and $3,650 outstanding as of June 30, 2022 and December 31, 2021, respectively. As of June 30, 2022 and December 31, 2021, the Company recorded an allowance for expected credit loss from the notes receivable of $7 and $6, respectively.

The customers to whom we offer financing through notes receivables are VIEs. However, the Company is not the primary beneficiary, because we do not have power to direct the activities of the VIEs that most significantly impact the VIEs’ economic performance. The VIEs are not consolidated into the Company’s consolidated financial statements but rather disclosed in the notes to our consolidated financial statements under ASC 810, Consolidation. The maximum loss exposure is limited to the carrying value of notes receivable as of the balances sheet dates.

9. Commitments and Contingencies

Lease Commitments

The Company has lease commitments under lease agreements. Refer to Note 19 for discussion.

Firm Purchase Commitment

To ensure adequate and timely supply of raw material for production, the Company, from time to time, enters into non-cancellable purchase and service contracts with vendors. As of June 30, 2022, the Company had open inventory purchase commitments of $173 under these contracts.

Minimum Volume Commitment

In June 2022, the Company entered into a long-term supply agreement with a minimum volume commitment with a third party, which provides services to process certain raw materials. Any purchase order issued under this supply agreement will be non-cancellable. To the extent the Company fails to order the guaranteed minimum volume defined in the contract at the end of the term, the Company is required to pay the counterparty an amount equal to the shortfall, if any, multiplied by a fee. As of June 30, 2022, the Company had an open purchase commitment of $232 under this agreement. The Company believes that the probability of failing to meet the minimum volume commitment is remote and no shortfall penalty has been accrued for.

Legal Proceedings

15

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EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

9. Commitments and Contingencies (cont.)

On July 7, 2022, the Company entered into a settlement agreement with the U.S. Department of Justice (the “DOJ”) and Vincent Icolari (“Relator”) to resolve the previously disclosed investigation by the DOJ for underpayment of certain custom duties in past years in connection with imports of batteries and battery components manufactured abroad. The investigation resulted from a qui tam lawsuit (the “Civil Action”) filed by the Relator in December 2019 alleging violations of the False Claims Act.

Pursuant to the terms of the settlement agreement, the Company has agreed to pay a total of $1,017 to the United States Department of Justice and $70 to Relator’s counsel. Upon receipt of such payments, the DOJ and the Relator have agreed to release the Company from civil monetary and administrative claims under the False Claims Act and the Relator has agreed to release the Company from any claims related to the Civil Action. The Company had estimated the settlement amount and accrued it in the previously filed financial statement and the settlement amount and legal fees were included in accrued expenses on the condensed consolidated balance sheets as of June 30, 2022.

In April 2022, the Company received a subpoena from the U.S. Securities and Exchange Commission requesting information regarding a variety of matters, including negotiations and agreements with customers and the Company’s disclosures to investors. The Company is fully cooperating with the investigation, which is at an early stage, and is endeavoring to address all inquiries raised by the SEC staff as expeditiously as possible.

10. Grant Expense, Net

From time-to-time, the Company has entered into grant agreements with the California Energy Commission (“CEC”) for conducting studies to demonstrate the benefits of certain energy-saving technologies to utility companies and consumers in the State of California. Under such agreements, the Company is entitled to receive reimbursement of costs incurred by the Company covered by the grants.

For the three and six months ended June 30, 2022, grant (income) expense, net was $(169) and $4, respectively. For the three and six months ended June 30, 2021, grant (income) expense, net was $(52) and $(44), respectively.

For the three and six months ended of June 30, 2022 and 2021, Eos has received no payments from the CEC. As of June 30, 2022 and December 31, 2021, the Company had grant receivables in the amounts of $1,250 and $1,020 which were included in other current assets, and deferred grant income of $183 and $—, which was included in accrued expenses on the condensed consolidated balance sheets, respectively. The expenses incurred by the Company related to the performance of studies in accordance with the respective grant agreements are offset, against the grants revenue received or receivable from the CEC for which the grant is intended to compensate the Company.

11. Income Taxes

For the three and six months ended June 30, 2022, the reported income tax benefit was $23 and $65, respectively. No income tax benefit or expense was recorded for the three and six months ended June 30, 2021. The income tax benefit differs from the amount computed by applying the statutory U.S. federal income tax rate of 21% to the loss before income taxes due to non-taxable gains, foreign operations, and pre-tax losses for which no tax benefit can be recognized for U.S. income tax purposes.

The Company estimates and applies the annual effective tax rate to its ordinary earnings each interim period. Any significant unusual or infrequent items, if any, are not included in the estimation of the annual effective tax rate. Rather, these items and their related income tax expense (benefit) are separately stated in the interim period in which they occur. The quarterly estimate of the annual effective tax rate and related tax expense is subject to variation due to a multitude of factors. Factors may include, but are not limited to, the inability to accurately predict the Company’s pre-tax and taxable income and loss.

16

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

11. Income Taxes (cont.)

At each balance sheet date, management assesses the likelihood that the Company will be able to realize its deferred tax assets. Management considered all available positive and negative evidence in assessing the need for a valuation allowance. The realization of deferred tax assets depends on the generation of sufficient taxable income of the appropriate character and in the appropriate taxing jurisdiction during the future periods in which the related temporary differences become deductible. Management has determined that it is unlikely that the Company will be able to utilize its U.S. deferred tax assets at June 30, 2022 and December 31, 2021 due to cumulative losses. Therefore, the Company has a valuation allowance against its net deferred tax assets.

As of June 30, 2022 and December 31, 2021, the Company has unrecognized tax benefits associated with uncertain tax positions that, if recognized, would not affect the effective tax rate on income from continuing operations. The Company is not currently under examination by any taxing jurisdiction, and none of the uncertain tax positions are expected to reverse within the next 12 months.

The Company files income tax returns in U.S. federal and various state jurisdictions, as well as Italy and India. The open tax years for federal returns is 2018 and forward, and open tax years for state returns is generally 2017 and forward. In addition, net operating losses generated in closed years and utilized in open years are subject to adjustment by the tax authorities.

12. Related Party Transactions

2021 Convertible Notes Payable

In July 2021, the Company issued $100,000 aggregate principal amount of convertible notes to Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries, Inc. (the “2021 Convertible Notes”). In connection with the 2021 Convertible Notes, the Company paid $3,000 to B. Riley Securities, Inc., a related party, who acted as a placement agent. This transaction was reviewed and approved as a related party transaction.

For the three and six months ended June 30, 2022, interest expense of $2,558 and $4,731 was recorded for the 2021 Convertible Notes, respectively. The change in fair value of the embedded derivative of $3,978 and $11,673 was recorded for the three and six months ended June 30, 2022 on the condensed consolidated statements of operations, respectively. Refer to Note 14 for more information.

Loss on pre-existing agreement

For the three and six months ended June 30, 2021, $22,516 and $30,368 was charged to loss on pre-existing agreement in connection with the acquisition of Hi-Power, respectively. Refer to Note 2 for the acquisition details.

Disgorgement of short swing profits

For the six months ended June 30, 2021, the Company received $432 from its then affiliated company B. Riley Securities, Inc. resulting from disgorgement of short swing profits under Section 16 (b) of the Exchange Act. This amount was recognized as an increase to Additional Paid in Capital as a capital contribution from stockholder when it was earned.

Warrants liability

The Company has private warrants issued to an affiliated company owned by B. Riley Financial, Inc. as of June 30, 2022 and December 31, 2021. Refer to Note 17 for details.

Settlement Agreement

As disclosed at the time of the Merger Agreement, prior to the execution and delivery of the Merger Agreement, certain unitholders (“Hellman Parties”) of Eos Energy Storage LLC (“EES”), a subsidiary of the Company, asserted claims (“Threatened Claims”) against another director and affiliated investors, including AltEnergy Storage VI, LLC (the "Securityholder Representative"), questioning the dilutive effect of certain historical security issuances on the former EES common unitholders.

17

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

12. Related Party Transactions (cont.)

Under the Merger Agreement, the Securityholder Representative had the obligation to defend against the Threatened Claims, and the Company had the obligation to advance or cause to be advanced to the Securityholder Representative up to $5,000 of defense costs, subject to a deductible of $2,000 (the "Deductible"), in connection with the investigation, defense, or settlement of any Threatened Claims. The Deductible was to be borne by the Company, and any additional amounts advanced were reimbursable by the former unitholders of EES.

On December 1, 2021, a Settlement Agreement was entered into between Hellman Parties and the Securityholder Representative pursuant to which, 300,000 Eos Shares (“Settlement Shares”) were to be transferred to the Hellman parties from the EES unitholders at the time of merger.

On December 28, 2021, the independent members of the Company’s Board of Directors approved a contribution of $1,200 towards the Settlement based on their determination that, among other reasons, this contribution (i) would ensure that the Company would not have to spend the entire $2,000 Deductible towards the costs of defense if the litigation were to continue, (ii) would avoid the distraction, uncertainty, and overhang of litigation relating to the Mergers, (iii) would benefit the Company’s future relationships with its long-term investors, and (iv) would generate future goodwill with such investors during an important growth stage of the Company. Because the Company’s contribution benefited certain Eos shareholders at the time of the Merger Agreement, including AltEnergy LLC and B. Riley Financial, Inc., this transaction was reviewed and approved as a related party transaction. On December 29, 2021, an amendment to the Settlement Agreement was entered into, pursuant to which, $1,200 of the value represented by the Settlement Shares was to be paid in cash, representing the equivalent of 140,023 of the Settlement Shares.

The Company accrued $1,200 in accounts payable and accrued expenses - related party on December 31, 2021, which has been paid on January 4, 2022. The remaining 159,977 in Settlement Shares were transferred to the Hellman Parties from the former EES unitholders, on a pro rata basis, on December 29, 2021.

Standby Equity Purchase Agreement (SEPA)

On April 28, 2022, the Company entered into the SEPA with YA II PN, Ltd. (“Yorkville”). Pursuant to the SEPA, the Company has the right, but not the obligation, to sell to Yorkville up to $200,000 of shares of its common stock at the Company’s request at any time during the commitment period, which commenced on April 28, 2022 and will end on the earlier of (i) May 1, 2024, or (ii) the date on which Yorkville shall have made payment of advances requested by the Company totaling up to the commitment amount of $200,000. Each sale the Company requests under the SEPA (an “Advance”) may be for a number of shares of common stock with an aggregate value of up to $20,000. The SEPA provides for shares to be sold to Yorkville at 97.0% of the Market Price (as defined below) and further provides that Yorkville cannot purchase any shares that would result in it owning more than 9.99% of the Company’s outstanding common stock at the time of an Advance (the "Ownership Limitation") or 19.99% of the Company's outstanding common stock as of the date of the SEPA (the "Exchange Cap"). The Exchange Cap will not apply under certain circumstances, including if the Company’s stockholders approve issuances in excess of the Exchange Cap. On June 28, 2022, shareholder approval was obtained to issue shares under the SEPA in excess of the Exchange Cap. “Market Price” is defined in the SEPA as the average of the VWAPs (as defined below) during each of the three consecutive trading days commencing on the trading day following the Company’s submission of an Advance notice to Yorkville. “VWAP” is defined in the SEPA to mean, for any trading day, the daily volume weighted average price of the Company’s common stock for such date on the Nasdaq Capital Market as reported by Bloomberg L.P. during regular trading hours.

In addition, subject to Yorkville’s consent, the Company may request one or more pre-advance loans in amounts not to exceed $50,000 (each, a “Pre-Advance Loan”) from Yorkville. Pursuant to the terms and conditions set forth in the SEPA and the accompanying promissory note, Pre-Advance Loans must be repaid with the proceeds from sales of equity to Yorkville, to the extent outstanding at the time of an Advance, or otherwise in cash. 465,117 shares were issued as consideration for its irrevocable commitment to purchase the Common Shares upon the terms and subject to the satisfaction of the conditions set forth in the SEPA.

18

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

12. Related Party Transactions (cont.)

As the Company has right, but not the obligation, to sell up to $200,000 of common stock to Yorkville, subject to certain limitations, at the time of our choosing during the term of the agreement, the Company determined that SEPA represents a derivative financial instrument under ASC 815, Derivatives and Hedging, which should be recorded at fair value at inception and each reporting date thereafter. The financial instrument was classified as a derivative asset with a fair value of zero at the inception of the SEPA and as of June 30, 2022. For the three and six months ended June 30, 2022, the Company has received cash of $5,000 from the issuance of 3,967,939 shares. Yorkville owned 4,433,056 shares of common stock or approximately 8% of the Company’s outstanding common stock after this issuance.

Supplemental Agreement to the SEPA and Promissory Note Issuance

On June 13, 2022, the Company issued and sold a convertible promissory note with an aggregate principal amount of $7,500 (the “Promissory Note” or “Yorkville Convertible Notes”) in a private placement to Yorkville under a supplemental agreement dated as of June 13, 2022 (the “Supplemental Agreement”) to the SEPA between the Company and Yorkville. The Supplemental Agreement gave Yorkville the right to deliver notices (each, an “Investor Notice”) requiring the Company to deliver an Advance notice under the SEPA for the issuance and sale of common stock for so long as there was an outstanding balance owed under the Promissory Note. The proceeds of any issuance of common stock pursuant to such Investor Notice will be used to repay amounts owed under the Promissory Note. For the three and six months ended June 30, 2022, interest expense of $108 was recorded for the Yorkville Convertible Notes. Refer to Note 14 for detail.

13. Accrued Expenses

As of June 30, 2022 and December 31, 2021, accrued expenses consisted of the following:

	June 30, 2022		December 31, 2021
Accrued payroll	$	4,602	$	3,069
Warranty reserve	3,636		2,112
Accrued legal and professional expenses	3,595		826
Provision for contract losses	1,249		—
Other	1,607		1,667
Total	$	14,689	$	7,674

The following table summarizes warranty reserve activity:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Warranty reserve - beginning of period	$	3,240	$	66	$	2,112	$	—
Additions for current period deliveries	828		774		1,501		840
Changes in the estimate of warranty reserve	366		32		1,321		32
Warranty costs incurred	(798)		—		(1,298)		—
Warranty reserve - end of period	$	3,636	$	872	$	3,636	$	872

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EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

14. Convertible Notes Payable - Related Party

Yorkville Convertible Note

On June 13, 2022, the Company issued and sold the Promissory Note with a stated principal amount of $7,500 in a private placement to Yorkville (“Yorkville” or the “Holder”) under the Supplemental Agreement. The Promissory Note has a maturity date of September 15, 2022 (the “Maturity Date”). The Promissory Note was issued with a 2% original issue discount and bears interest only upon the occurrence of an Event of Default, as discussed below. The Company shall reimburse the Holder promptly for all fees, costs and expenses, including, without limitation, attorneys’ fees and expenses incurred by the Holder in connection with the Promissory Note if the Company fails to strictly comply with the terms of the Promissory Note. Total cash proceeds of $7,350 were received upon the issuance.

Mandatory Repayments - Six installments of $1,250 shall be made starting from August 11, 2022, ending on the Maturity Date. The Company may repay each installment amount in either cash or by delivering an Advance notice under the SEPA or in a combination of these two. Refer to Note 12 for details regarding the SEPA. An additional 3% payment premium applies to any installment amount paid in cash. If an installment is repaid in shares via delivery of an Advance notice, the payment premium does not apply. The Company accounts for the payment premium as principal.

Conversion Rights - Yorkville has the right, but not the obligation, to convert principal and accrued interest into shares of the Company’s common stock at a conversion price of $2.21 (the “Conversion Price”) any time prior to the Maturity Date, subject to the terms and conditions of the Promissory Note. At any time that there is an outstanding balance owed under the Promissory Note, the Holder may, pursuant to the terms of the Supplemental Agreement, deliver Investor Notices to require the Company to issue and sell shares of common stock under the SEPA at the Conversion Price in order to repay the amounts owed by the Company to the Holder under the Promissory Note. In addition, while there is an outstanding balance owed under the Promissory Note, the Company may use any Advance requested by the Company pursuant to the SEPA to repay the amounts owed by the Company to the Holder under the Promissory Note. Prior to June 28, 2022, the shares issuable upon conversion were subject to the Exchange Cap. Refer to Note 12 for details regarding the Exchange Cap.

Optional Redemption - The Company has the right, but not the obligation, to redeem (“Optional Redemption”) early a portion or all amounts outstanding under the Promissory Note provided that (i) the Company provides the Holder with at least five trading days’ prior written notice (each, a “Redemption Notice”) of its desire to exercise an Optional Redemption, and (ii) the VWAP of the Company’s common stock on each of the ten trading days immediately prior to the Redemption Notice is less than the conversion price.

Redemption upon Event of Default - Upon the occurrence of an Event of Default (as defined in the SEPA), interest will begin to accrue at a rate of 15% per year and Yorkville may elect to accelerate the repayment of each installment.

Embedded Derivatives - The number of shares issuable for conversion of the Promissory Notes is subject to the Exchange Cap limitation under the SEPA, unless shareholder approval is obtained. Therefore, at issuance, shareholder approval is an explicit input that can adjust the number of shares issuable upon settlement. Because shareholder approval is not an input that is indexed to the Company’s shares, the conversion feature is not indexed to the Company's own stock. Therefore, the conversion feature does not qualify for the scope exception to derivative accounting and bifurcation is required at issuance. On June 28, 2022, shareholder approval was obtained to issue shares under the SEPA in excess of the Exchange Cap. As such, upon the receipt of shareholder approval, the conversion feature no longer requires bifurcation and would be classified in equity.

20

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

14. Convertible Notes Payable - Related Party (cont.)

In addition, upon the occurrence of an Event of Default, as defined in the Promissory Note, interest will begin to accrue at a rate of 15% per year and reimbursement of fees, cost and expenses incurred by the Holder in any action in connection with the Promissory Note are required if the Company fails to comply with the Promissory Note. An event of default and the nature of noncompliance includes events that are unrelated to Company’s credit worthiness and/or interest rates. Therefore, these features are not clearly and closely related to the debt host and bifurcation is required for this feature under the requirement of Accounting Standards Codification 815, Derivatives and Hedging (“ASC 815”).

Management concluded the fair value of the bifurcated embedded derivative described above as of the issuance date, June 28, 2022 and June 30, 2022 is de minimis.

Debt Issuance Costs - The Company incurred $125 of legal fees in connection with the issuance of the Promissory Note. No debt issuance costs were allocated to the embedded derivative due to the de minimis fair value and the full amount of the issuance cost were allocated to the Promissory Note. These costs were accounted for as debt issuance costs and recorded as a reduction to the initial carrying value of the Promissory Note.

The following table summarizes interest expense recognized for the three and six months ended June 30, 2022:

	For the Three and Six Months Ended June 30, 2022
Contractual interest expense	$	—
Amortization of debt discount	81
Amortization of debt issuance costs	27
Total	$	108

The Yorkville Convertible Note as of June 30, 2022 are comprised of the following:

	June 30, 2022
Principal-Installment	$	7,500
Principal- Payment Premium	225
Unamortized debt discount	(294)
Unamortized debt issuance costs	(98)
Aggregate carrying value	$	7,333

2021 Convertible Notes

As previously reported, on July 6, 2021, the Company entered into an investment agreement (the “Investment Agreement”) with Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries providing for the issuance and sale to Koch Industries of convertible notes in the aggregate principal amount of $100,000 (the “2021 Convertible Notes”). The transactions contemplated by the Investment Agreement closed on July 7, 2021 (the “Issue Date”). The maturity date of the 2021 Convertible Notes is June 30, 2026, subject to earlier conversion, redemption, or repurchase.

The Company estimated the fair value of the embedded conversion feature using a binomial lattice model at the inception and on subsequent valuation dates. This model incorporates inputs such as the stock price of the Company, dividend yield, risk-free interest rate, the effective debt yield and expected volatility. The effective debt yield and volatility involve unobservable inputs classified as Level 3 of the fair value hierarchy. Refer to Note 20 for definition of the fair value hierarchy. The assumptions used to determine the fair value of the embedded conversion feature as of June 30, 2022 and December 31, 2021 are as follows:

21

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

14. Convertible Notes Payable - Related Party (cont.)

	June 30, 2022		December 31, 2021
Term	4.0 years		4.5 years
Dividend yield	—	%	—	%
Risk-free interest rate	3.0	%	1.2	%
Volatility	80.0	%	60.0	%
Effective debt yield	25.5	%	19.0	%

As of June 30, 2022 and December 31, 2021, the fair value of the embedded conversion feature was $707 and $12,359, respectively. The Company recognized a gain of $3,978 and $11,673 attributable to the change in fair value of the embedded conversion feature for the three and six months ended June 30, 2022, respectively.

The following table summarizes interest expense recognized:

	For the Three Months Ended June 30, 2022		For the Six Months Ended June 30, 2022
Contractual interest expense	$	1,544	$	3,087
Amortization of debt discount	924		1,467
Amortization of debt issuance costs	90		177
Total	$	2,558	$	4,731

The 2021 Convertible Notes as of June 30, 2022 and December 31, 2021 was comprised of the following:

	June 30, 2022		December 31, 2021
Principal	$	105,987	$	102,900
Unamortized debt discount	(26,876)		(28,321)
Unamortized debt issuance costs	(2,613)		(2,790)
Embedded conversion feature	707		12,359
Aggregate carrying value	$	77,205	$	84,148

The Company elected to repay the contractual interest due on June 30, 2022 in-kind as an increase to the principal amount. $3,087 of contractual interest attributable to the 2021 Convertible Notes was recorded as addition to the convertible notes payable - related party balance on the condensed consolidated balance sheets.

15. Note Payable

In connection with the Hi-Power acquisition (Refer to Note 2), the Company agreed to pay an aggregate purchase price of $25,000. $5,000 of the $25,000 purchase price was paid in May 2021. The fair value of the note payable was estimated using active market quotes, based on our current incremental borrowing rates for similar types of borrowing arrangements, which were Level 2 inputs. Refer to Note 20 for definition of the fair value hierarchy. Based on the analysis performed, the carrying value of the remaining payments of the note payable was recorded as debt, which includes a current portion of $4,839 and a long-term portion of $9,177 as of June 30, 2022. As of December 31, 2021, notes payable includes a current portion of $4,926 and a long-term portion of $13,769, respectively.

16. Long-term Debt

Long-term debt consists of the outstanding balances from the previously-reported $25,000 equipment financing facility with Trinity Capital Inc. ("Trinity"). As of June 30, 2022, the Company had drawn $7,000 from the equipment financing facility with an effective interest rate of 14.3%.

22

Table of Contents

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

16. Long-term Debt (cont.)

As of June 30, 2022 and December 31, 2021, total long-term debt was $5,581 and $6,371, with $1,765 and $1,644 of the principal recorded as a current liability on the condensed consolidated balance sheets, respectively. For the three and six months ended June 30, 2022, the Company recognized $205 and $424 as interest expense attributable to the equipment financing agreement, respectively. As of June 30, 2022, the unused commitment from the equipment financing facility was $18,000.

17. Warrants Liability - Related Party

The Private Placement Warrants issued to the Sponsor of BMRG in its initial public offering on May 22, 2020 became exercisable on May 22, 2021. The Private Placement Warrants are classified as Level 2 financial instruments in the fair value hierarchy. Refer to Note 20 for definition of the fair value hierarchy. They are valued on the basis of the quoted price of the Public Warrants, adjusted for insignificant difference between the Public Warrants and Private Placement Warrants. 325,000 Private Placement Warrants were outstanding with a fair value of $89 and $926 as of June 30, 2022 and December 31, 2021, respectively.

The change in fair value for the three months ended June 30, 2022 and 2021 amounted to $270 and $585 and for the six months ended June 30, 2022 and 2021 amounted to $837 and $361, respectively. The change has been recognized in Change in fair value, warrants liability - related party in the Company’s condensed consolidated statements of operations.

18. Stock-Based Compensation

Stock-based compensation expense included in the condensed consolidated statements of operations was as follows:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Stock options	$	509	$	1,025	$	1,420	$	2,547
Restricted stock units	2,925		2,170		5,957		3,126
Total	$	3,434	$	3,195	$	7,377	$	5,673

The stock compensation expense has been recorded in cost of goods sold, research and development expenses, and selling, general and administrative expenses in the condensed consolidated statements of operations.

The following table summarizes stock option activity for the six months ended June 30, 2022:

	Units	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (years)
Options Outstanding at December 31, 2021	2,023,460	$	9.51	6.3
Granted	2,870,108	$	1.29
Cancelled/Forfeited	(135,808)	$	9.28
Options Outstanding at June 30, 2022	4,757,760	$	4.56	8.1
Options Exercisable at June 30, 2022	1,415,703	$	9.76	5.4

A summary of restricted stock units (RSUs) activity during the six months ended June 30, 2022 is as follows:

23

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

18. Stock-Based Compensation (cont.)

	Units	Weighted-Average Grant-Data Fair Value
RSUs Outstanding at December 31, 2021	2,194,756	$	16.36
Granted	1,950,734	$	3.24
Cancelled/Forfeited	(394,850)	$	11.09
Vested	(427,607)	$	17.83
RSUs Outstanding at June 30, 2022	3,323,033	$	9.09

In 2022, the Company reserved an additional 2,537,866 shares for the Amended and Restated 2020 Incentive Plan. As of June 30, 2022 and December 31, 2021, 530,588 and 2,282,906 shares remain for future issuance, respectively. Options vesting can vary from three months to five years and have a term of five to ten years. RSUs generally vest over three to four years. During the six months ended June 30, 2022, the Company granted 75,000 RSUs and 2,000,000 options with performance and service conditions. Stock compensation is recognized on a straight-line basis over the requisite service period of the award, which is generally the award vesting term. For awards with performance conditions, compensation expense is recognized using an accelerated attribution method over the vesting period. The performance conditions primarily relate to achievement of sales and financing targets. As of June 30, 2022, within the total awards outstanding, there were 2,028,818 and 75,000 performance-based stock options and RSUs, respectively, all of which are expected to vest in the next four years.

Unrecognized stock compensation expenses amounted to $26,539 and included $23,051 attributable to RSUs and $3,488 attributable to stock options. The weighted average vesting period for the stock options and RSUs was 0.8 years and 1.9 years as of June 30, 2022, respectively.

The weighted average assumptions used to determine the fair value of options granted in the six months ended June 30, 2022 and 2021 were as follows:

	2022		2021
Volatility	61.29	%	57.31	%
Risk free interest rate	3.18	%	1.09	%
Expected life (years)	4.60		6.13
Dividend yield	0	%	0	%

The RSUs issued were valued at the stock prices of the Company on the date of grant.

The weighted average grant date fair value of all options granted was $0.68 and $9.08 per option for the six months ended June 30, 2022 and 2021.

19. Leases

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), and the related amendments (collectively “ASC 842”). The Company elected the modified retrospective approach, under which results and disclosures for periods before January 1, 2021 were not adjusted for the new standard and the cumulative effect of the change in accounting, is recognized through accumulated deficit at the date of adoption.

Lessee

The Company leases machinery, manufacturing facilities, office space, land, and equipment under both operating and finance leases. Lease assets and lease liabilities as of June 30, 2022 and December 31, 2021 were as follows:

24

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

19. Leases (cont.)

	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Assets
ROU - operating lease assets	Operating lease right-of-use asset, net	$	4,772	$	3,468
Finance lease assets	Property, plant and equipment, net	89		28
Total lease assets		$	4,861	$	3,496
	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Liabilities
Current
Operating lease liability	Operating lease liability, current portion	$	1,013	$	1,084
Finance lease liability	Other current liabilities	13		8
Non-Current
Operating lease liability	Operating lease liability, long-term	4,705		3,224
Finance lease liability	Other liabilities	76		17
Total lease liabilities		$	5,807	$	4,333

Operating lease costs for the three months ended June 30, 2022 and 2021 were $352 and $280, and for the six months ended June 30, 2022 and 2021 were $677 and $473, respectively. As of June 30, 2022, the weighted average remaining term (in years) for the operating lease was 4.31 years and the weighted average discount rate was 10.4%. The weighted average remaining term (in years) for the finance lease was 4.71 years and the weighted average discount rate was 22.7%.

Future maturity of lease liability are as follows:

	Operating Lease		Financing Lease		Total
Remainder of 2022	$	730	$	15	$	745
2023	1,538		31		1,569
2024	1,617		31		1,648
2025	1,701		31		1,732
2026	1,420		25		1,445
Later years	—		12		12
Total minimum lease payments	$	7,006	$	145	$	7,151
Less amounts representing interest	1,288		56		1,344
Present value of minimum lease payments	$	5,718	$	89	$	5,807

Lessor

The Company leases battery energy storage systems to one customer with a 20-year term through sales-type leases. Leases offered by the Company include purchase options during the lease term with a bargain purchase option at the end of the term. At the time of accepting a lease that qualifies as a sales-type lease, the Company records the gross amount of lease payments receivable, estimated residual value of the leased equipment and unearned finance income. The unearned finance income is recognized interest income over the lease term using the interest method.

25

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

19. Leases (cont.)

For the three and six months ended June 30, 2022, the Company recognized revenue of $128 and $1,166 from the sales-type lease, respectively. No revenue was recognized from the sales-type lease for the three and six months ended June 30, 2021. Net sales-type lease receivables of $1,438 and $347, net of unearned finance income are recorded under other assets on the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021, respectively.

20. Fair Value Measurement

The Company’s financial instruments consist of cash and cash equivalents, restricted cash, Private Placement Warrants, accounts receivable, notes receivable, contract assets, accounts payable, note payable, convertible notes payable — related party, contract liabilities and long-term debt.

Accounting standards establish a hierarchy which prioritizes the inputs to valuation techniques used to measure fair value into three levels. The fair value hierarchy gives the highest priority to quoted market prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

Accounting standards require financial assets and liabilities to be classified based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and the exercise of this judgment may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, contract assets, contract liabilities and accounts payable are considered to be representative of their fair value due to the short maturity of these instruments.

The table below summarizes the fair values of certain liabilities that are included within our accompanying condensed consolidated balance sheets, and their designations among the three fair value measurement categories:

	June 30, 2022						December 31, 2021
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Liabilities
Private Placement Warrants	$	—	$	89	$	—	$	—	$	926	$	—
Embedded derivative liability within the 2021 Convertible Notes	$	—	$	—	$	707	$	—	$	—	$	12,359

The following table presents a roll-forward of the activity of the embedded derivative liability within the 2021 Convertible Notes. This liability was measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2022. No liabilities were measured at fair value using Level 3 inputs for the three and six months ended June 30, 2021.

	For the Three Months Ended		For the Six Months Ended
	June 30, 2022		June 30, 2022
Balance at beginning of the period	$	4,664	$	12,359
Additions	21		21
Change in fair value included in earnings	(3,978)		(11,673)
Balance at end of the period	$	707	$	707

26

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

20. Fair Value Measurement (cont.)

The estimated fair value of financial instruments not carried at fair value in the condensed consolidated balance sheets was as follows:

	Level in Fair Value Hierarchy	June 30, 2022				December 31, 2021
		Carrying Value		Fair Value		Carrying Value		Fair Value
Notes receivable	3	$	3,855	$	2,062	$	3,650	$	2,805
Note payable	3	$	14,016	$	9,867	$	18,695	$	14,607
Equipment financing facility	3	$	5,581	$	4,847	$	6,371	$	5,951
Yorkville Convertible Note	3	$	7,333	$	7,444	$	—	$	—
2021 Convertible Notes without embedded derivative liability	3	$	76,498	$	55,082	$	71,789	$	61,866

21. Shareholders’ Equity (Deficit)

Preferred Shares

The Company is authorized to issue 1,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s Board of Directors. At June 30, 2022 and December 31, 2021, there were no shares of preferred stock issued or outstanding.

Common Stock

On June 28, 2022, the Company’s shareholders approved an amendment to our Third Amended and Restated Certificate of Incorporation to increase the authorized shares of common stock with $0.0001 par value from 200,000,000 to 300,000,000. The holders of the Company’s common stock are entitled to one vote for each share. At June 30, 2022 and December 31, 2021, there were 58,519,739 and 53,786,632 shares of common stock issued and outstanding. As of June 30, 2022, the Company has generated net proceeds of $5,000 from the issuance of 3,967,939 shares at an average price of $1.26 per common share under the SEPA. In addition, upon the entry into the SEPA, 465,117 shares were issued to Yorkville as consideration for its irrevocable commitment to purchase common stock pursuant to the SEPA. Fair value of these shares of $1,061 was recorded as other expense in the condensed consolidated statements of operations and comprehensive loss.

Contingently Issuable Common Stock

Following the closing of the Merger, and as additional consideration for the transaction, the Company was obligated to issue within five years from the closing date to each unitholder of EES its pro-rata proportion of a one-time issuance of an aggregate of 2,000,000 Shares (the “Earnout Shares” or "Contingently Issuable Common Stock"), within 5 business days after (i) the closing share price of the Company's shares traded equaling or exceeding $16.00 per share for any 20 trading days within any consecutive 30-trading day period during the Earnout Period or (ii) a Change of Control (or a definitive agreement providing for a Change of Control having been entered into) during the Earnout Period (each of clauses (i) and (ii), a “Triggering Event”).

On January 22, 2021, the Triggering Event for the issuance of the Earnout Shares occurred as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period during the Earnout Period. Accordingly, 1,999,185 Earnout Shares were issued to the unitholders of EES.

27

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

21. Shareholders’ Equity (Deficit) (cont.)

Sponsor Earnout Shares

Pursuant to the Sponsor Earnout letter signed in connection with the Merger, 1,718,000 shares of common stock issued and outstanding held by BMRG ("Sponsor Earnout Shares") were subject to certain transfer and other restrictions, under which (a) 859,000 Sponsor Earnout Shares ("Block A Sponsor Earnout Shares") are restricted from being transferred unless and until either, for a period of five years after the Closing, (i) the share price of our common stock equals or exceeds $12.00 per share for any 20 trading days within any consecutive 30-trading day period or (ii) a change of control occurs for a share price equaling or exceeding $12.00 per share, and (b) the remaining 859,000 Sponsor Earnout Shares ("Block B Sponsor Earnout Shares") are subject to similar restrictions except that the threshold is increased from $12.00 to $16.00. If after the five year period, there are no Triggering Events, the Sponsor Earnout Shares will be forfeited and canceled for no consideration. If after the five year period, only the Triggering Event described in clause (a) above has occurred, the remaining 859,000 Sponsor Earnout Shares described in clause (b) will be forfeited and canceled for no consideration.

On January 22, 2021, as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period, the Block B Sponsor Earnout Shares were released from restriction.

Treasury Stock

For the three and six months ended June 30, 2022, the Company recorded treasury stock of $26 and $852 for shares withheld from employees to cover the payroll tax liability of RSUs vested. The treasury stock was immediately retired. No treasury stock was recorded for the three and six months ended June 30, 2021.

Warrants

The Company sold warrants to purchase 9,075,000 shares of the Company's common stock in the public offering and the private placement on May 22, 2020. Each warrant entitles the holder to purchase a share of common stock at a price of $11.50 per share. For the three months ended June 30, 2022 and 2021, — and 1,465,414 of Public Warrants were exercised, respectively, and for the six months ended June 30, 2022 and 2021, 600 and 1,465,414 of Public Warrants were exercised, respectively. At June 30, 2022 and December 31, 2021, there were 7,001,654 and 7,002,254 Public Warrants outstanding.

Earnings (loss) Per Share

Basic earnings per share (“EPS”) is computed by dividing earnings available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Other potentially dilutive common shares, and the related impact to earnings, are considered when calculating EPS on a diluted basis. As we incurred a net loss for the three and six months ended June 30, 2022 and 2021, the potential dilutive shares from stock options, restricted stock units, warrants, and convertible redeemable notes were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented. Therefore, basic and diluted EPS are computed using the same number of weighted average shares for the three and six months ended June 30, 2022 and 2021. The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	For the Three and Six Months Ended June 30,
	2022	2021
Stock options and restricted stock units	8,080,793	4,154,478
Warrants	7,326,654	7,609,586
Convertible Notes (if converted)	8,692,061	—

28

EOS ENERGY ENTERPRISES, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(In thousands, except share and per share amounts)

22. Subsequent Events

Senior Secured Term Loan Credit Agreement

On July 29, 2022 (the “Closing Date”), the Company entered into a Senior Secured Term Loan Credit Agreement (the “Credit Agreement”) with ACP Post Oak Credit I LLC, as lender, administrative agent and collateral agent, and the lenders from time to time party thereto (collectively, “Atlas” or the “Lender”). The Credit Agreement provides for an $85,106 term loan (the “Term Loan”), the entirety of which was funded on the Closing Date. The Credit Agreement also permits the Company to make an one-time request for an additional commitment of up to $14,894, with funding of such commitment in the sole discretion of the Lenders, under certain circumstances and under the same terms as set forth in the Credit Agreement. On the Closing Date, the Company also entered into a Guarantee and Collateral Agreement, dated as of July 29, 2022, by and among the Company, the other grantors named therein and Atlas (the “Guarantee and Collateral Agreement”).

The Term Loan is set to mature on the earlier of (i) July 29, 2026 and (ii) 91 days prior to the then-current maturity date of the 2021 Convertible Notes, which matures on June 30, 2026, after giving effect to any extension, refinancing or replacement thereof (the “Maturity Date”).

The outstanding principal balance of the Term Loan bears interest at the applicable margin plus, at the Company’s election, either (i) the benchmark secured overnight financing rate (“SOFR”), which is a per annum rate equal to the greater of (y) the Term SOFR (as defined in the Credit Agreement) plus 0.2616% and (z) 1.0%, or (ii) the alternate base rate (“ABR”), which is a per annum rate equal to the greatest of (x) the Prime Rate (as defined in the Credit Agreement), (y) the NYFRB Rate (as defined in the Credit Agreement) plus 0.5% and (z) the SOFR. The applicable margin under the Credit Agreement is 8.50% per annum with respect to SOFR loans, and 7.50% per annum with respect to ABR loans.

The Term Loan is secured by substantially all of the assets of the Company and its subsidiaries other than the assets of Hi-Power and is guaranteed by the Company’s subsidiaries other than Hi-Power. The Credit Agreement also contains customary affirmative and negative covenants. In particular, the Credit Agreement requires the Company to have liquidity of at least $9,621 as of the last day of each fiscal quarter, subject to certain adjustments set forth in the Credit Agreement. In addition, the Credit Agreement limits the Company’s and its subsidiaries’ ability to incur indebtedness, make restricted payments, including cash dividends on its common stock, make certain investments, loans and advances, enter into mergers and acquisitions, sell, assign, transfer or otherwise dispose of its assets, enter into transactions with its affiliates and engage in sale and leaseback transactions, among other restrictions. Furthermore, the limitation on the Company’s ability to incur indebtedness also (i) limits the amount of Pre-Advance Loans that the Company may have outstanding at any time to $15,000 under the SEPA and (ii) requires the payment of principal and interest in kind on each of the Pre-Advance Loans (if any) and the 2021 Convertible Notes.

Repayment of Yorkville Convertible Note

In July 2022, pursuant to the terms of the Supplemental Agreement, Yorkville delivered six Investor Notices under the SEPA requiring the Company to issue and sell an aggregate of 3,393,663 shares of common stock at a price of $2.21 per share. The total purchase price of the shares of common stock was $7,500. The proceeds from the issuance of the shares were used to repay all outstanding amounts owed to Yorkville pursuant to the Promissory Note. The shares were issued on July 22, 2022 and August 1, 2022.

29

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion should be read in conjunction with the accompanying unaudited financial statements for the six months ended June 30, 2022 and 2021 and our Annual Report on Form 10-K for the year ended December 31, 2021, including the financial statements and notes thereto.

Statement Regarding Forward-Looking Information

This report contains statements about the future, sometimes referred to as “forward-looking” statements. Forward-looking statements are typically identified by the use of the words “anticipate,” “believe,” “estimate,” “project,” “expect,” “intend,” “plan,” “should,” and similar words and expressions. Statements that describe our future strategic plans, goals, or objectives are also forward-looking statements.

Readers of this report are cautioned that any forward-looking statements, including those regarding our management’s current beliefs, expectations, anticipations, estimations, projections, proposals, plans, or intentions, are not guarantees of future performance or results of events and involve risks and uncertainties. The forward-looking information is based on present circumstances and on our predictions respecting events that have not occurred, that may not occur, or that may occur with different consequences from those now assumed or anticipated. Actual events or results may differ materially from those discussed in the forward-looking statements as a result of various factors. See also the “Risk Factors” disclosures contained in our Annual Report on Form 10-K for the year ended December 31, 2021 for additional discussion of the risks and uncertainties that could cause our actual results to differ materially from those expressed or implied in our forward-looking statements. The forward-looking statements included in this report are made only as of the date of this report. We are not obligated to update such forward-looking statements to reflect subsequent events or circumstances.

Business Overview

The Company was originally incorporated in Delaware on June 3, 2019 as a special purpose acquisition company under the name B. Riley Principal Merger Corp. II., in order to acquire, through a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination. Upon the completion of the business combination on November 16, 2020, the Company changed its name to “Eos Energy Enterprises, Inc.” The Company’s common shares started trading under the ticker NASDAQ: EOSE on November 16, 2020.

On April 9, 2021, the Company acquired, from Holtec, the 51% interest in Hi-Power that was not already owned by the Company. Following the consummation of the transaction, Hi-Power became a 100% indirect, wholly-owned subsidiary of the Company and the obligations of the parties under the Hi-Power joint venture terminated.

Eos Energy Enterprises, Inc. (the “Company” or “Eos”) designs, develops, manufactures, and markets innovative energy storage solutions for utility-scale, microgrid, and commercial & industrial (“C&I”) applications. Eos developed a broad range of intellectual property with multiple patents covering unique battery chemistry, mechanical product design, energy block configuration and a software operating system (Battery Management System). The Battery Management System (“BMS”) software uses proprietary Eos-developed algorithms and includes ambient and battery temperature sensors, as well as voltage and electric current sensors for the electrical strings and the system. Eos focuses on designing, developing, producing and selling safe, reliable, long-lasting and low-cost turn-key alternating current (“AC”) integrated systems using Eos’ direct current (“DC”) Battery Energy Storage System (“BESS”). The Company’s primary applications focus on integrating battery storage solutions with: (1) renewable energy systems that are connected to the utility power grid; (2) renewable energy systems that are not connected to the utility power grid; (3) storage systems utilized to relieve congestion; and (4) storage systems to assist C&I customers in reducing their peak energy usage or participating in the utilities ancillary and demand response markets. The Company has a manufacturing facility in Turtle Creek, Pennsylvania to produce DC energy blocks with an integrated BMS. The Company’s primary market is North America with opportunistic growth opportunities in Europe, Oceania, Africa, and Asia.

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Strategy

The Company offers an innovative Znyth™ aqueous zinc battery energy storage system designed to provide the operating flexibility to manage increased grid complexity deriving from an overall increase in renewable energy generation and a congested grid coming from an increase in electricity demand growth. Our battery energy storage system is safe, scalable, sustainable and manufactured in the United States. Our battery energy storage system is the core of our innovative systems that today provide utilities, independent power producers, renewables developers, and C&I customers with a proven, reliable energy storage alternative for 3- to 12-hour discharge durations. Our innovative spirit extends to our manufacturing strategy, which includes proprietary equipment and processes that allow us to scale quickly and with a lower capital intensity than other similar technologies. We believe our technology will continue to reduce cost and improve the operating efficiency and competitiveness of our battery energy storage systems.

Our growth strategy contemplates increasing sales of battery energy storage systems and related software and services through our direct sales team and sales channel partners. Our current and target customers include utilities, project developers, independent power producers and commercial and industrial companies.

In addition to our battery energy storage systems, we currently offer: (a) a Battery Management System, a remote asset monitoring capability and service to track the performance and health of our battery energy storage system and to proactively identify future system performance issues through predictive analytics; (b) project management services to ensure the process of implementing our battery energy storage systems are coordinated in conjunction with the customer’s overall project plans; (c) commissioning services that ensure the customer’s installation of the battery energy storage system meets the performance expected by the customer, and (d) operations and maintenance plans to maintain optimal operating performance of our systems.

Significant Factors Affecting Operating Results

Commercialization

We achieved third-party product safety certification from Underwriter Laboratories (“UL”) for the Company’s system in August 2021. Eos’ battery energy storage system now meets international UL standards for battery energy storage systems.

We continue to ramp up to full-scale production and enhance our factory testing protocols to ensure that our battery energy storage systems will operate at expected and optimized performance. While we expect the performance of our battery energy storage systems to improve as we increase our production volume, we anticipate the possibility of some supply chain disruptions because of the overall volatile supply chain environment and as a result of our suppliers rapidly ramping up their manufacturing capacity in conjunction with ours, which may affect the timing of deliveries to our customers.

Some of our customers may experience project delays in connection with site selection and preparation, permitting procedures and establishing grid connections. These delays have impacted, and may, from time to time, continue to impact the timing of our deliveries and, therefore, our results of operations.

We continue to invest in production quality and manufacturing processes as we continue to scale our manufacturing capabilities to meet current backlog demand. We expect overall cost reductions, as well as improved quality driven by: (1) scale; (2) optimization of manufacturing processes through continuous improvement efforts; (3) better training and increasing experience level of our production labor force; (4) engineering design changes to reduce manufacturing complexity while also enhancing system performance; (5) improvement in equipment uptime and equipment maintenance; and (6) executing against our strategic sourcing strategy.

Market Trends and Competition

We expect the global energy storage market to grow given the current geopolitical and economic environment. Based on recent industry studies, the global energy storage market will grow at an estimated 30% compound annual growth rate between 2022 and 2030. Simply stated, the world needs more energy. We believe the world wants to generate that energy with sustainable sources, but this objective creates imbalances in our existing energy grid. Managing and mitigating those imbalances will require multiple energy storage technologies to provide safe and reliable power. Until now, most energy storage systems have been in short durations, meaning they have reliably provided power for less than four hours. We believe the future will require longer duration (6-12 hour) battery energy storage systems that provide the flexibility to match intermittency and congestion. We believe the storage opportunity is large (the projected Total Addressable Market = 115 GWh), and the numbers are big (every 1% share = $250M). The Znyth™ battery is composed of five earth-abundant, readily available raw materials with mature supply chains that allow us to drive cost down as we scale.

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We believe the Russian-Ukrainian war has added more urgency to global efforts for energy security as the reliance on Russian gas has led European policymakers to action to accelerate the transitions to alternative sources of power, including clean energy, and to increase stationary energy storage deployments. We also believe the recent significant increase in energy prices will be a catalyst for global efforts to decarbonize the grid, which is critical for meeting climate change goals.

We believe Lithium-ion (“Li-ion”) currently has over 95% market share in the stationary energy storage market. Li-ion’s prices for energy storage systems have increased significantly as final product availability remains extremely limited due to the lack of availability and significant increases in cost of Li-ion battery raw material components, including lithium carbonate, nickel, and cobalt as well as the high demand of Li-ion batteries driven primarily by mobile device applications. We believe we are the first commercially available battery system that is not based on Li-ion chemistry. We anticipate our battery energy storage system using Znyth™ technology will gradually take market share of the stationary storage market. This considers its unique operating characteristics, including a 100% depth of discharge capability, flattened degradation curve and a 3- to 12-hour duration, as well as other characteristics related to safety and the cost of operating and maintaining our battery energy storage system. Our ability to successfully deploy our battery energy storage system technology and gain market share in the energy storage market will be important to the growth of our business.

Regulatory Landscape

In North America, geographic distribution of energy storage deployment has been driven by regulatory policy with both federal and state level programs contributing to stable revenue streams for energy storage.

Recent regulatory developments supporting the energy storage market include:

•New Jersey plans to initiate an energy storage incentive program totaling $180 million over 3 years;

•Michigan created a roadmap for the future of storage in the state, including a proposed 4 GW of energy storage by 2040 deployment target;

•Northwest Power and Conservation Council’s six-year action plan called for 3.5 GW of new renewable sources by 2027, including a 4-hour standalone and paired battery storage systems;

•California’s 2022-2023 budget includes $380 million for long duration storage as part of a $2 billion Clean Energy Funding Plan. The California Energy Storage Alliance and Strategy Consulting previously estimated that California needs 45+ GW of long duration storage in order to reach the state’s goal of 100% renewable electricity by 2045; and

•New York doubled its energy storage target from 3 GW by 2030 to 6 GW while keeping the same timeframe. Previous studies indicated the state will need at least 15 GW of storage by 2040 to support zero-emission goals.

Economic Impacts

We are currently operating in a period of global economic and geopolitical uncertainty, which has been exacerbated by the ongoing military conflict between Russia and Ukraine. Although the length and impact of the ongoing military conflict is highly unpredictable, the conflict in Ukraine has led to market disruptions, including significant volatility in commodity prices, credit and capital markets, an increase in cybersecurity incidents as well as additional supply chain disruptions. Additionally, Russia’s actions have led to sanctions and other penalties being levied by the United States, the European Union, and other countries, as well as other public and private actors and companies, against Russia and certain other geographic areas. We are continuing to monitor the situation in Ukraine, including its global effects, and assessing its potential impact on our business, including the timing of our sales as certain customers purchase safety stock for their own supply chains. Although our business has not been materially impacted by the ongoing military conflict in Ukraine as of the date of this filing, it is impossible to predict the extent to which our operations, or those of our customers or suppliers, will be impacted, or the ways in which the conflict may impact our business, cash flows or results of operations.

The novel coronavirus (“COVID-19”) outbreak has adversely affected the Company's workforce and operations, as well as the operations of its customers, distributors, suppliers and contractors. The Company has remained focused on maintaining protective measures to ensure the safety, health and welfare of our workforce and supply chain partners and delivering on commitments to our customers. The COVID-19 pandemic may impact our financial condition and results of operations in the future, which will ultimately depend on future developments, such as the ultimate duration and scope of the pandemic, its impact on our employees, customers, and supply chain partners, and the impact on the overall economy. Please see the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2021.

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The U.S. economy is experiencing broad and rapid inflation as well as supply issues in materials, service and labor due to among other factors, the effects of the pandemic and, more recently, the war in Ukraine. These impacts are likely to persist through 2022 and beyond. We cannot predict the impact on the Company’s customers or our manufacturing costs.

Company Highlights

•In February 2022, we announced the expansion of our manufacturing facility to more than triple capacity to 800 MWh and meet production demand for its Znyth™ aqueous zinc batteries. The facility is located in Turtle Creek, Pennsylvania, outside of Pittsburgh, in a state-of-the-art facility known as Keystone Commons. The planned expansion of this facility will provide the Company with more than 46,000 square feet of additional space and the ability to create more than 125 jobs. The expansion is expected to be completed by December 2022.

•In February 2022, the Company announced that it had advanced through Part I of the U.S. Department of Energy’s (“DOE”) Renewable Energy and Efficient Energy Loan Program. To be invited to submit a Part II loan application, the Company had to demonstrate to the DOE that Eos’s Znyth™ battery technology employs innovative technology and avoids or reduces greenhouse gas emissions. The Company has since proceeded to Part II of the application process to support, among other things, the previously announced expansion to triple the annualized capacity of its Turtle Creek domestic manufacturing facility to 800MWh by the end of 2022. In May 2022, the Company submitted an application under Part II of the loan program.

•In March 2022, the Company entered into a master supply agreement with Bridgelink Commodities, LLC (“Bridgelink”) for storage projects across Texas (the “Bridgelink MSA”). Bridgelink committed to purchase 240 MWh of energy storage capacity provided by Eos’ Znyth™ zinc-based battery technology, accompanied by an option to purchase long-term maintenance support, with an additional option to expand to a total of 500 MWh over a term of 3 years, representing a total order value of up to $150 million.

•In April 2022, we announced that the Company entered into a $200 million common stock Standby Equity Purchase Agreement (the “Original SEPA”) with YA II PN, Ltd., an affiliate of Yorkville Advisors (“Yorkville”), which was subsequently amended by Amendment No. 1 thereto on June 13, 2022 (the “Amendment” and, together with the Original SEPA, the “SEPA”). The SEPA gives the Company the right, but not the obligation, to sell up to $200 million of common equity to Yorkville during the two-year term of the agreement. In May 2022, the Company issued and sold 3,967,939 shares of common stock to YA II PN, Ltd. under the SEPA for $5.0 million. In June 2022, the Company issued and sold a convertible promissory note (the “Promissory Note”) with an aggregate principal amount of $7.5 million in a private placement to YA II PN, Ltd. under a supplemental agreement dated as of June 13, 2022 to the SEPA between the Company and Yorkville (“the Supplemental Agreement”). As of the date of this report, the Company has repaid all outstanding amounts owed to Yorkville pursuant to the Promissory Note by issuing and selling to Yorkville an aggregate of 3,393,663 shares of its common stock.

•In April 2022, Eos shipped its 100th Energy Block energy storage system followed by completing production of the 20,000th battery module in early June at the Company’s Turtle Creek, Pennsylvania manufacturing facility. These milestones were accomplished in large part due to incremental production yield increases for three consecutive quarters culminating with crossing the 90% throughput yield threshold in early May.

•In June 2022, Bridgelink Commodities, LLC increased the Bridgelink master supply agreement to 1 GWh of energy storage systems for deliveries over the next three years with an incremental order value of $181 million for new project installations and also issued a separate 40 MWh order valued at $13 million for fourth quarter 2022 delivery.

•In June 2022, a 300 MWh master supply agreement was signed with a leading Northeast solar developer for front of the meter stand-alone storage and solar storage applications that provide energy shifting and ancillary services with deliveries forecasted over the next three years.

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Results of Operations

Comparison of three months ended June 30, 2022 and 2021

The following table sets forth our operating results for the periods indicated:

	For the Three Months Ended
($ in thousands)	June 30, 2022		June 30, 2021		$ Change		% Change
Revenue	$	5,895	$	612	$	5,283	863
Cost and expenses:
Cost of goods sold	36,866		12,364		24,502		198
Research and development	5,464		3,647		1,817		50
Selling, general and administrative expenses	19,115		11,325		7,790		69
Loss on pre-existing agreement	—		22,516		(22,516)		(100)
Loss from write-down of property, plant and equipment	1,997		—		1,997		NM
Grant expense (income), net	(169)		(52)		(117)		225
Operating loss	(57,378)		(49,188)		(8,190)		17
Other income (expense)
Interest expense, net	(284)		(154)		(130)		84
Interest expense - related party	(2,664)		—		(2,664)		NM
Remeasurement of equity method investment	—		(7,480)		7,480		(100)
Change in fair value, embedded derivative - related party	3,978		—		3,978		NM
Change in fair value, warrant liability - related party	270		585		(315)		(54)
Sale of state tax attributes	—		2,194		(2,194)		(100)
Other income (expense)	(632)		—		(632)		NM
Loss before income taxes	$	(56,710)	$	(54,043)	$	(2,667)	5
Income tax benefit	23		—		23		NM
Net loss	$	(56,687)	$	(54,043)	$	(2,644)	5

A summary of our operating results for the three months ended June 30, 2022 is as follows:

Revenue

The Company generates revenues from the delivery of our battery energy storage systems and service-related solutions. We expect revenues to increase as we scale our production to meet customer demand.

Revenue increased by $5.3 million, or 863% from $0.6 million for the three months ended June 30, 2021 to $5.9 million for the three months ended June 30, 2022. The increase in revenue for the three months ended June 30, 2022 was primarily driven by a higher volume of battery energy storage systems delivered from our backlog compared to the same period of 2021.

Cost of goods sold

Cost of goods sold increased by $24.5 million, or 198% from $12.4 million for the three months ended June 30, 2021 to $36.9 million for the three months ended June 30, 2022. The Company began shipping battery energy storage systems to customers in 2021. As a result, we have yet to achieve our optimal operational scale. However, we are beginning to experience improvement in first-pass manufacturing yield and increased throughput, and a material cost benefit from scale. We believe we have not yet reached the cost entitlement of our product cost, manufacturing processes or system design. We have seen significantly reduced scrap rates along with increased production output as we continue to ramp our production. We expect our overall gross margin percentage to improve as we increase volume in our factory, further refine our manufacturing processes, continue to optimize our supply chain, increase our sales, and spread our overhead costs over larger production volumes.

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Research and development expenses

Research and development expenses consist primarily of salaries and other personnel-related costs, materials, third-party services, depreciation on equipment and facilities used in our research and development process, and amortization of intangible assets. We expect our research and development costs to increase for the foreseeable future as we continue to invest in research and development activities that are necessary to develop our future technologies. We are investing to optimize how we manufacture and operate our battery energy storage system in the field, using a chemistry that has been proven over the last decade. In addition, we continue to invest in a next generation product whose test results to date are showing increased performance at an overall lower system cost than our current product configuration.

Research and development costs increased by $1.8 million or 50% from $3.6 million for the three months ended June 30, 2021 to $5.5 million for the three months ended June 30, 2022. The increase in research and development costs was primarily driven by $2.1 million of outside professional services, partially offset by a $0.3 million decrease of materials and supplies purchased.

Selling, general and administrative expenses

Selling, general and administrative expenses consist mainly of personnel-related expenses including corporate, executive, finance, and other administrative functions, expenses for outside professional services, including legal, audit and accounting services, and expenses for facilities, depreciation, amortization, travel, and marketing costs. We expect selling, general and administrative expenses to increase for the foreseeable future as we implement an infrastructure that supports the growth of our business.

Selling, general and administrative expenses increased by $7.8 million or 69% from $11.3 million for the three months ended June 30, 2021 to $19.1 million for the three months ended June 30, 2022, primarily driven by increases of $3.3 million in outside consulting service expenses, primarily due to performance-based fees related to product cost reduction actions, $2.4 million in payroll and personnel costs and $1.3 million in legal and professional costs.

Loss on pre-existing agreement

The Company incurred a loss on a pre-existing agreement of $22.5 million for the three months ended June 30, 2021 from the termination of the JV agreement with Holtec.

Loss from write-down on property, plant and equipment

The Company incurred a $2.0 million loss from a write-down on property, plant and equipment for the three months ended June 30, 2022 due to the Company’s review of its assets and the resulting disposals identified for assets not in use as of June 30, 2022.

Grant (income) expense, net

Grant (income) expense, net includes our expenses net of reimbursement related to grants provided primarily by the California Energy Commission (“CEC”).

Grant (income) expense, net increased by $0.1 million from $0.1 million grant income for the three months ended June 30, 2021 to $0.2 million grant income for the three months ended June 30, 2022, which relates to grant expenses expected to be recovered from the CEC.

Interest expense, net and interest expense - related party

Interest expense, net increased by $0.1 million or 84% from $0.2 million for the three months ended June 30, 2021 to $0.3 million for the three months ended June 30, 2022. This increase is a result of interest on the equipment financing facility, which was entered into in September 2021.

Interest expense - related party increased by $2.7 million for the three months ended June 30, 2022 related to the 2021 Convertible Notes issued to Koch Industries in July 2021 and the Yorkville Convertible Notes issued in June 2022. Interest expense includes accrued interest and the amortization of debt issuance cost and the debt discount.

Remeasurement of equity method investment

For the three months ended June 30, 2021, we recognized a $7.5 million loss on our equity method investment in Hi-Power. This loss on our equity method investment resulted from remeasurement of our 49% ownership in Hi-Power on April 9, 2021 due to our acquisition of the remaining 51% interest previously held by Holtec.

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Change in fair value, embedded derivative - related party

The 2021 Convertible Notes issued in July 2021 contains a conversion feature which is precluded from being considered indexed to the Company’s stock. Therefore, the conversion feature is accounted for as an embedded derivative and remeasured at its fair value at each balance sheet date. The change in its fair value is recognized in the condensed consolidated statements of operations during the period of change. The change in fair value of $4.0 million for the three months ended June 30, 2022 reflects the change in fair value of the embedded derivative feature largely as a result of the decrease in the Company’s stock price.

Change in fair value, warrants liability - related party

The $0.3 million, or 54% change, from $0.6 million for the three months ended June 30, 2021 to $0.3 million for the three months ended June 30, 2022, reflects the change in fair value of the Private Placement Warrants classified as liability.

Sale of state tax attributes

We recognized income of $2.2 million during the three months ended June 30, 2021, related to the sale of our state net operating losses and research and development credit carryforwards under the New Jersey Economic Development Authority Technology Business Tax Certificate Transfer Program.

Other income (expense)

Other expense of $0.6 million for the three months ended June 30, 2022 included a commitment fee of $1.1 million paid upon entry into SEPA and $0.1 million of issuance costs from an Advance notice issued under the SEPA in May 2022, offset by the gain of $0.5 million from the settlement of the Advance under the SEPA.

Income tax benefit

An income tax benefit of less than 0.1 million was recorded for the three months ended June 30, 2022 in relation to the pre-tax loss from the Company’s international subsidiaries.

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Comparison of six months ended June 30, 2022 and 2021

The following table sets forth our operating results for the periods indicated:

	For the Six Months Ended
($ in thousands)	June 30, 2022		June 30, 2021		$ Change		% Change
Revenue	$	9,193	$	776	$	8,417	1,085
Cost and expenses:
Cost of goods sold	72,443		12,453		59,990		482
Research and development	10,427		8,700		1,727		20
Selling, general and administrative expenses	33,394		20,127		13,267		66
Loss on pre-existing agreement	—		30,368		(30,368)		(100)
Loss from write-down on property, plant and equipment	2,005		11		1,994		18,127
Grant expense (income), net	4		(44)		48		(109)
Operating loss	(109,080)		(70,839)		(38,241)		54
Other income (expense)
Interest expense, net	(622)		(175)		(447)		255
Interest expense - related party	(4,838)		—		(4,838)		NM
Remeasurement of equity method investment	—		(7,480)		7,480		(100)
Change in fair value, embedded derivative - related party	11,673		—		11,673		NM
Change in fair value, warrant liability - related party	837		361		476		132
Income from equity in unconsolidated joint venture	—		440		(440)		(100)
Sale of state tax attributes	—		2,194		(2,194)		(100)
Other income (expense)	(513)		—		(513)		NM
Loss before income taxes	$	(102,543)	$	(75,499)	$	(27,044)	36
Income tax benefit	65		—		65		NM
Net loss	$	(102,478)	$	(75,499)	$	(26,979)	36

A summary of our operating results for the six months ended June 30, 2022 is as follows:

Revenue

Revenue increased by $8.4 million, or 1,085% from $0.8 million for the six months ended June 30, 2021 to $9.2 million for the six months ended June 30, 2022. The increase in revenue for the six months ended June 30, 2022 was primarily driven by higher volume of battery energy storage systems delivered from our backlog compared to the same period of 2021.

Cost of goods sold

Cost of goods sold increased by $60.0 million, or 482% from $12.5 million for the six months ended June 30, 2021 to $72.4 million for the six months ended June 30, 2022. The Company began shipping battery energy storage systems to customers in 2021. As a result, we have yet to achieve our optimal operational scale. However, we are beginning to experience improvement in first-pass manufacturing yield and increased throughput, and a material cost benefit from scale. We believe we have not yet reached the cost entitlement of our product cost, manufacturing processes or system design. We have seen significantly reduced scrap rates along with increased production output as we continue to ramp our production. We expect our overall gross margin percentage to improve as we increase volume in our factory, further refine our manufacturing processes, continue to optimize our supply chain, increase our sales, and spread our overhead costs over larger production volumes.

Research and development expenses

Research and development costs increased by $1.7 million or 20% from $8.7 million for the six months ended June 30, 2021 to $10.4 million for the six months ended June 30, 2022. The increase in research and development costs was primarily driven by $2.1 million of outside professional services and $1.6 million of payroll and stock compensation costs, offset by a $2.2 million decrease of materials and supplies due to reduced battery testing.

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Selling, general and administrative expenses

Selling, general and administrative expenses increased by $13.3 million or 66% from $20.1 million for the six months ended June 30, 2021 to $33.4 million for the six months ended June 30, 2022, primarily driven by increases of $3.9 million in outside service expenses, primarily due to performance-based fees related to product cost reduction actions, $5.4 million in payroll and personnel costs, $2.4 million in legal and professional costs, $0.8 million in customs, duties and other taxes and $0.5 million in stock compensation costs.

Loss on pre-existing agreement

The company incurred a loss on pre-existing agreement of $30.4 million for the six months ended June 30, 2021 from the termination of the JV agreement with Holtec.

Loss from write-down on property, plant and equipment

The Company incurred a $2.0 million loss from a write-down on property, plant and equipment for the six months ended June 30, 2022 due to the Company’s review of its assets and the resulting disposals identified for assets not in use as of June 30, 2022.

Grant (income) expense, net

Grant expense, net increased by less than $0.1 million for the six months ended June 30, 2022, compared to the six months ended June 30, 2021, which relates to grant expenses expected to be recovered from the CEC.

Interest expense, net and interest expense - related party

Interest expense, net increased by $0.4 million or 255% from $0.2 for the six months ended June 30, 2021 to $0.6 million for the six months ended June 30, 2022. This increase is a result of interest on an equipment financing facility, which was entered into in September 2021.

Interest expense - related party increased by $4.8 million for the six months ended June 30, 2022 related to the 2021 Convertible Notes issued to Koch Industries in July 2021 and the Yorkville Convertible Note issued in June 2022. Interest expense includes accrued interest and the amortization of debt issuance costs and the debt discount.

Remeasurement of equity method investment

For the six months ended June 30, 2021, we recognized a $7.5 million loss on our equity method investment in Hi-Power. This loss on our equity method investment resulted from remeasurement of our 49% ownership in Hi-Power on April 9, 2021 due to our acquisition of the remaining 51% interest previously held by Holtec.

Change in fair value, embedded derivative - related party

The change in fair value of $11.7 million for the six months ended June 30, 2022 reflects the change in fair value of the embedded derivative feature of the 2021 Convertible Notes largely as a result of the decrease in the Company’s stock price.

Change in fair value, warrants liability - related party

The $0.5 million, or 132% change, from $0.4 million for the six months ended June 30, 2021 to $0.8 million for the six months ended June 30, 2022, reflects the change in fair value of the Private Placement Warrants classified as liability.

Income from equity in unconsolidated joint venture

The income from equity in unconsolidated joint venture is attributable to the results of our joint venture Hi-Power before the acquisition. Hi-Power became a wholly-owned subsidiary on April 9, 2021 and its operational results have been consolidated within the Company’s condensed consolidated statements of operations since the acquisition date for the six months ended June 30, 2022.

Sale of state tax attributes

We recognized income of $2.2 million during the six months ended June 30, 2021, related to the sale of our state net operating losses and research and development credit carryforwards under the New Jersey Economic Development Authority Technology Business Tax Certificate Transfer Program.

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Other income (expense)

Other expense of $0.5 million for the six months ended June 30, 2022 included a commitment fee of $1.1 million paid upon entry into the SEPA and $0.1 million of issuance costs from an Advance issued under the SEPA in May 2022, offset by the gain of $0.5 million from the settlement of the Advance under the SEPA.

Income tax benefit

An income tax benefit of less than 0.1 million was recorded for the six months ended June 30, 2022 in relation to the pre-tax loss from the Company’s international subsidiaries.

Liquidity and Capital Resources

The Company continues to increase the commercialization of its battery energy storage system and build a manufacturing footprint to meet its current demand. To date, the Company has had limited revenue generating activities. Accordingly, the Company has incurred significant recurring losses, and net operating cash outflows from operations. Operating expenses consist primarily of costs related to the Company’s sales of its battery energy storage system and related services, research and development costs, and recurring general and administrative expenses. Management and the Company’s Board of Directors anticipate the Company will eventually reach a scale of profitability through the sale of battery energy storage systems and other complementary products and services, and therefore, the Company believes the current stage of the Company’s lifecycle justifies continued intensive investment in the development and launch of products. Accordingly, the Company expects to continue to incur significant losses and net operating cash outflows from operations for the foreseeable future and to continue to require additional capital to fund the Company’s operations and obligations as they become due, including funding that is necessary to continue to scale up the Company’s operations to allow for the delivery of order backlog, to secure additional order opportunities for its battery energy storage systems, and to continue to invest in research and development.

The Company continues to pursue various funding options to raise additional capital to support its operations. As previously reported, the Company has moved through Part I of the application under the U.S. Department of Energy’s Loan Guarantee Solicitation for Applications for Renewable Energy Projects and Efficient Energy Projects (the “DOE Loan Program”), and submitted an application under Part II of the loan program in May 2022. In addition, in April 2022, the Company entered into a $200 million common stock SEPA with YA II PN, Ltd. an affiliate of Yorkville Advisors (“Yorkville”). The SEPA gives the Company the right, but not the obligation, to sell up to $200 million of common equity to Yorkville at times of the Company’s choosing during the two-year term of the agreement. The SEPA provides for shares to be issued to Yorkville at a discounted price of 97.0% of the 3-day volume-weighted average price following notification to Yorkville that the Company wishes to draw upon the facility (each, an “Advance”). Furthermore, the SEPA allows for Pre-Advance loans in the aggregate principal amount not to exceed $50 million per loan, pursuant to a promissory note subject to the mutual consent of the parties, which must be repaid with the proceeds from sales of equity to Yorkville, to the extent outstanding at the time of an Advance, or otherwise in cash. Notwithstanding the foregoing, pursuant to the terms of the Credit Agreement (as defined below), we cannot incur more than $15 million of Pre-Advance Loans pursuant to the SEPA. The Company’s option to sell shares of common stock to Yorkville remains subject to certain limitations including a requirement that Yorkville may not purchase any shares that would result in it owning more than 9.99 percent of the Company’s outstanding common stock at the time of an Advance. In May 2022, the Company issued and sold 3,967,939 shares of common stock to YA II PN, Ltd. under the SEPA for $5.0 million. In June 2022, the Company issued and sold a Promissory Note with an aggregate principal amount of $7.5 million in a private placement to Yorkville under the Supplemental Agreement to the SEPA. The Supplemental Agreement gave Yorkville the right to deliver notices (each, “Investor Notice”) requiring the Company to deliver an Advance notice under the SEPA for the issuance and sale of common stock for so long as there was an outstanding balance owed under the Promissory Note. The proceeds of any issuance of common stock pursuant to such an Advance will be used to repay amounts owed under the Promissory Note. As of August 1, 2022, we have repaid all outstanding amounts owed to Yorkville pursuant to the Promissory Note by issuing and selling to Yorkville an aggregate of 3,393,663 shares of our common stock pursuant to the Investor Notices.

There can be no assurance that the Company will successfully complete Part II of the DOE Loan Program or that the Company will be able to utilize the SEPA to its full $200.0 million capacity, or otherwise be able to obtain new funding from other sources on terms acceptable to the Company, on a timely basis, or at all.

The Company continues to believe the uncertainties mentioned above raise substantial doubt about the Company’s ability to continue as a going concern. If the Company is unable to raise additional capital, on acceptable terms or at all, the Company may have to significantly delay, scale back or ultimately discontinue the development or commercialization of its product and/or consider a sale or other strategic transaction.

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As of June 30, 2022, the Company had total assets of $97,740, which includes total cash and cash equivalents of $16,273, total liabilities of $155,569, which includes the total amounts owed on the Company’s outstanding convertible notes payable of $84,538 (see Note 14 in the Notes to the condensed consolidated financial statements), notes payable of $14,016 (see Note 15 in the Notes to the condensed consolidated financial statements) and long-term debt of $5,581 (see Note 16 in the Notes to the condensed consolidated financial statements) and a total accumulated deficit of $519,005, which is primarily attributable to the significant recurring losses the Company has accumulated since inception. The Company has historically relied on outside capital to fund its cost structure and expects this reliance to continue for the foreseeable future until the Company reaches profitability through its planned revenue generating activities. However, as of the date the accompanying condensed consolidated financial statements were issued, management concluded that the Company did not have sufficient capital on hand to support its current cost structure for one year after the date the accompanying condensed consolidated financial statements were issued. Based on our current financial projections, which are consistent with previous assessments, the Company will require additional capital to fund its operations or defer or reduce cash expenditures in the second half of 2022 to continue our operations.

As previously disclosed, since our inception, we have financed our operations primarily through funding received from the Private Placement of convertible notes and the issuance of common and preferred units. In November 2020, we received $142.3 million in connection with the consummation of the Merger and the Private Placement upon the Closing. In July 2021, we received $100.0 million in proceeds from the issuance of the 2021 Convertible Notes to Koch Industries (see Note 14 in the Notes to our condensed consolidated financial statements). In September 2021, the Company entered into a $25.0 million Equipment Financing Agreement with Trinity (the “Equipment Financing Agreement”), the proceeds of which will be used to acquire certain equipment and other property, subject to Trinity's approval. As of June 30, 2022, the Company had drawn $7.0 million from this equipment financing agreement. In May 2022, the Company received proceeds of $5.0 million from the issuance of shares under the SEPA between the Company and Yorkville, and net proceeds of $7.35 million from the issuance and sale of the Promissory Note to Yorkville under the Supplemental Agreement.

On July 29, 2022 (the “Closing Date”), the Company entered into a Senior Secured Term Loan Credit Agreement (the “Credit Agreement”) with ACP Post Oak Credit I LLC, as lender, administrative agent and collateral agent, and the lenders from time to time party thereto (collectively, “Atlas” or the “Lender”). The Credit Agreement provides for an $85.1 million term loan (the “Term Loan”), the entirety of which was funded on the Closing Date. The Credit Agreement also permits the Company to make an one-time request for an additional commitment of up to $14.9 million, with funding of such commitment in the sole discretion of the Lenders, under certain circumstances and under the same terms as set forth in the Credit Agreement. On the Closing Date, the Company also entered into a Guarantee and Collateral Agreement, dated as of July 29, 2022, by and among the Company, the other grantors named therein and Atlas (the “Guarantee and Collateral Agreement”).

The Term Loan is set to mature on the earlier of (i) July 29, 2026 and (ii) 91 days prior to the then-current maturity date of the 2021 Convertible Notes, which matures on June 30, 2026, after giving effect to any extension, refinancing or replacement thereof (the “Maturity Date”).

The outstanding principal balance of the Term Loan bears interest at the applicable margin plus, at the Company’s election, either (i) the benchmark secured overnight financing rate (“SOFR”), which is a per annum rate equal to the greater of (y) the Term SOFR (as defined in the Credit Agreement) plus 0.2616% and (z) 1.0%, or (ii) the alternate base rate (“ABR”), which is a per annum rate equal to the greatest of (x) the Prime Rate (as defined in the Credit Agreement), (y) the NYFRB Rate (as defined in the Credit Agreement) plus 0.5% and (z) the SOFR. The applicable margin under the Credit Agreement is 8.50% per annum with respect to SOFR loans, and 7.50% per annum with respect to ABR loans.

The Term Loan is secured by substantially all of the assets of the Company and its subsidiaries other than the assets of Hi-Power and is guaranteed by the Company’s subsidiaries other than Hi-Power. The Credit Agreement also contains customary affirmative and negative covenants. In particular, the Credit Agreement requires the Company to have liquidity of at least $9.6 million as of the last day of each fiscal quarter, subject to certain adjustments set forth in the Credit Agreement. In addition, the Credit Agreement limits the Company’s and its subsidiaries’ ability to incur indebtedness, make restricted payments, including cash dividends on its common stock, make certain investments, loans and advances, enter into mergers and acquisitions, sell, assign, transfer or otherwise dispose of its assets, enter into transactions with its affiliates and engage in sale and leaseback transactions, among other restrictions. Furthermore, the limitation on the Company’s ability to incur indebtedness also (i) limits the amount of Pre-Advance Loans that the Company may have outstanding at any time to $15.0 million under the SEPA and (ii) requires the payment of principal and interest in kind on each of the Pre-Advance Loans (if any) and the 2021 Convertible Notes.

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We expect capital expenditures and working capital requirements to increase as we seek to execute on our growth strategy. We currently anticipate that total capital expenditures for fiscal 2022 will be approximately $25.0 million to $35.0 million, which will be used primarily for additional equipment, automation, and other infrastructure to expand our capacity to meet our customer’s needs. Our capital expenditure and working capital requirements in the foreseeable future may change depending on many factors, including but not limited to equipment requirements to support the next generation(s) of our battery energy storage systems and growth in our backlog, our operating results, our ability to secure funding and any adjustments in our operating plan needed in response to industry conditions, competition or unexpected events.

The following table summarizes our cash flows from operating, investing, and financing activities for the periods presented.

	Six Months Ended June 30,
($ in thousands)	2022		2021
Net cash used in operating activities	$	(86,992)	$	(48,887)
Net cash used in investing activities	$	(11,758)	$	(15,784)
Net cash provided by financing activities	$	10,584	$	17,508

Cash flows from operating activities:

Cash flows used in operating activities to date have been primarily comprised of costs related to research and development, manufacturing of our products, and other general and administrative activities. As we expand the commercial-grade production of our battery energy storage systems, we expect our expenses related to personnel, manufacturing, research and development and selling, general and administrative activities to increase.

Net cash used in operating activities was $87.0 million for the six months ended June 30, 2022 which was comprised of a net loss of $102.5 million, adjusted for non-cash charges, including stock-based compensation of $7.4 million, depreciation and amortization of $2.3 million, change in fair value of embedded derivative of $11.7 million, change in fair value of warrants liability of $0.8 million, accreted interest on convertible notes payable of $1.5 million, and loss on write-down of property, plant and equipment of $2.0 million. The net cash inflow from changes in operating assets and liabilities was $13.1 million, primarily driven by an increase in accounts payable and accrued expenses of $20.6 million and increase in contract liabilities of $0.9 million, partially offset by an increase in accounts receivable of $0.7 million, an increase in vendor deposits of $5.3 million, and a decrease in notes payable of $4.7 million.

Net cash used in operating activities was $48.9 million for the six months ended June 30, 2021, which was comprised of a net loss of $75.5 million, adjusted for non-cash charges, including stock-based compensation of $5.7 million, depreciation and amortization of $1.1 million, loss from remeasurement of equity investment of $7.5 million, and a change in fair value of warrants liability of $0.4 million. The net cash inflow from changes in operating assets and liabilities was $12.8 million, primarily driven by an increase in notes payable of $18.4 million, increase in contract liability of $1.3 million, increase in accounts payable and accrued expenses of $1.4 million, partially offset by a decrease in the provision for firm purchase commitments of $3.4 million, increase in vendor deposits of $3.2 million, and an increase in inventory of $1.6 million. The cash used in operating activities includes $15.1 million in payments made to Holtec in connection with the termination of the JV agreement. In addition, a significant amount of cash was spent on materials to refine and improve our manufacturing process as well as research and development activities to improve quality consistency.

Cash flows from investing activities:

Cash flows used in investing activities for the six months ended June 30, 2022 were comprised primarily of payment made for purchases of property, plant and equipment of $11.5 million and notes receivable advanced to customers of $0.3 million.

Our cash flows used in investing activities for the six months ended June 30, 2021 were composed primarily of payments made for the Hi-Power acquisition of $0.2 million, purchases of property, plant and equipment of $7.5 million, investment in joint venture of $4.0 million, and notes receivable advanced to customers of $4.1 million.

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Cash flows from financing activities:

Net cash provided by financing activities was $10.6 million for the six months ended June 30, 2022, primarily due to the net proceeds received from issuance of convertible notes of $7.2 million and proceeds received from issuance of common stock under SEPA of $5.0 million, partially offset by payments on the equipment financing facility of $0.8 million and $0.9 million for share repurchases from employees for tax withholding purposes.

Net cash provided by financing activities was $17.5 million for the six months ended June 30, 2021, primarily due to the proceeds received from warrants exercised of $16.9 million and from options exercised of $0.8 million.

We have certain obligations and commitments to make future payments under contracts. The following table sets forth our estimates of future payments at June 30, 2022. See Note 9, Note 14, Note 15, Note 16, and Note 19 for further information of these obligations and commitments.

($ in thousands)	Total		Less than 1 year		1-3 years		3-5 years		More than 5 years
2021 Convertible Notes, including interest (1)	$	128,271	$	2,729	$	10,917	$	114,625	$	—
Yorkville Convertible Note, including interest (2)	7,725		7,725		—		—		—
Note payable, including interest	15,000		5,000		10,000		—		—
Operating and capital lease	7,151		1,519		3,297		2,335		—
Firm purchase commitment	405		405		—		—		—
Equipment financing, including interest	6,815		2,453		4,362		—		—
Total	$	165,367	$	19,831	$	28,576	$	116,960	$	—

(1) The methods of interest payments for the 2021 Convertible Notes are based on the Company's current intentions, which are subject to change. As of June 30, 2022, the Company intended to repay the contractual interest due on December 30, 2022 in-kind and remaining interest in cash. However, the Credit Agreement the Company entered into on July 29, 2022 limits the interest payment due in the future to be paid in-kind.

(2) As of the date of this report, the Company has repaid all outstanding amounts owed to Yorkville under the Promissory Note by issuing and selling 3,393,663 shares of common stock pursuant to Investor Notices delivered pursuant to the SEPA and the Supplemental Agreement.

Critical Accounting Estimates

Our condensed consolidated financial statements are prepared in conformity with U.S. generally accepted accounting principles. In preparing our condensed consolidated financial statements, we make assumptions, judgments, and estimates on historical experience and various other factors that we believe to be reasonable under the circumstances. Actual results could differ materially from these estimates under different assumptions or conditions. We regularly reevaluate our assumptions, judgments, and estimates.

Our significant accounting policies are described in Note 1 in the Notes to the audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021. Our most significant accounting policies, which reflect significant management estimates and judgment in determining amounts reported in our financial statements for the quarter ended June 30, 2022 were product warranty and fair value of the embedded conversion feature. There have been no material changes to our critical accounting estimates as compared to our critical accounting policies and estimates included in our Annual Report on Form 10-K for the year ended December 31, 2021.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes in our market risk exposures for the six months ended June 30, 2022, as compared to those discussed in our Annual Report on Form 10-K for the year ended December 31, 2021.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, under the supervision of our Chief Executive Officer (CEO) and our Chief Financial Officer (CFO), evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based upon that evaluation, and consistent with the evaluations previously reported in prior periods, the CEO and CFO have concluded that our disclosure controls and procedures were not effective as of June 30, 2022 because of material weaknesses resulting from our lack of a formalized internal control framework in accordance with COSO, inadequate segregation of duties in the financial reporting process, lack of review and approval of journal entries, and a lack of management review controls.

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed in our reports filed under the Exchange Act is accumulated and communicated to management, including our CEO and our CFO, to allow timely decisions regarding required disclosure.

In light of these material weaknesses, we performed additional analyses, reconciliations, and other post-closing procedures to determine that our condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles. Accordingly, management concluded that the condensed consolidated financial statements included in this report fairly present in all material respects our financial condition, results of operations and cash flows for the periods presented.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934) during our most recent quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Part II - Other information

Item 1. Legal Proceedings

From time to time, we may be involved in litigation relating to claims arising out of our operations.

As disclosed in Note 9 of the Notes to our condensed consolidated financial statements, the Company was under a previously-reported investigation by the U.S. Department of Justice (the “DOJ”) for underpayment of certain custom duties in past years in connection with imports of batteries and battery components manufactured abroad. On July 7, 2022, the Company entered into a settlement agreement (the “Settlement Agreement”) with the DOJ and Vincent Icolari (“Relator”) to resolve the investigation. The investigation resulted from a qui tam lawsuit (the “Civil Action”) filed by the Relator in December 2019 alleging violations of the False Claims Act, which is currently pending in the United States District Court for the District of New Jersey.

Pursuant to the terms of the Settlement Agreement, Eos Energy has agreed to pay a total of $1.0 million to the United States and $0.1 million to Relator’s counsel. The Company had estimated the settlement amount and accrued it in the previously filed financial statement and the final settlement amount and legal fee were included in accrued expenses on the condensed consolidated balance sheets as of June 30, 2022.

As disclosed in Note 9 of the Notes to our condensed consolidated financial statements, in April 2022, the Company received a subpoena from the U.S. Securities and Exchange Commission requesting information regarding a variety of matters, including negotiations and agreements with customers and the Company’s disclosures to investors. The Company is fully cooperating with the investigation, which is at an early stage, and is endeavoring to address all inquiries raised by the SEC staff as expeditiously as possible.

Item 1A. Risk Factors

In addition to the other information set forth in the Quarterly Report on Form 10-Q, you should carefully consider the factors discussed in Part I, Item 1A, “Risk Factors” in our Annual Report on Form 10-K, for the fiscal year ended December 31, 2021, as further supplemented by the following updated risk factor related to potential legal proceedings.

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The nature of our business exposes us to potential legal proceedings or claims that could adversely affect our operating results. These claims could conceivably exceed the level of our liability insurance coverage.

We are a party to lawsuits in the normal course of our business. Litigation can be expensive, lengthy and disruptive to normal business operations. Moreover, the results of complex legal proceedings are difficult to predict. Responding to lawsuits brought against us, or legal actions that we may initiate, can be expensive and time-consuming. Unfavorable outcomes from these claims and/or lawsuits could adversely affect our business, results of operations, or financial condition, and we could incur substantial monetary liability and/or be required to change our business practices.

Our business may expose us to claims for personal injury, death or property damage resulting from the use of our products or from employee related matters. Additionally, we could be subject to potential litigation associated with compliance with various laws and governmental regulations at the federal, state or local levels, such as those relating to the protection of persons with disabilities, employment, health, safety, security and other regulations under which we operate.

In April 2022, the Company received a subpoena from the U.S. Securities and Exchange Commission requesting information regarding a variety of matters, including negotiations and agreements with customers and the Company’s disclosures to investors. The Company is fully cooperating with the investigation, which is at an early stage, and is endeavoring to address all inquiries raised by the SEC staff as expeditiously as possible.

We carry comprehensive insurance, subject to deductibles, at levels we believe are sufficient to cover existing and future claims made during the respective policy periods. However, we may be exposed to multiple claims, and, as a result, could incur significant out-of-pocket costs before reaching the deductible amount, which could adversely affect our financial condition and results of operations. In addition, the cost of such insurance policies may increase significantly upon renewal of those policies as a result of general rate increases for the type of insurance we carry as well as our historical experience and experience in our industry. Although we have not experienced any material losses that were not covered by insurance, our existing or future claims may exceed the coverage level of our insurance, and such insurance may not continue to be available on economically reasonable terms, or at all. If we are required to pay significantly higher premiums for insurance, are not able to maintain insurance coverage at affordable rates or must pay amounts in excess of claims covered by our insurance, then we could experience higher costs that could adversely affect our financial condition and results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None

Item 3. Defaults Upon Senior Securities

None

Item 4. Mine Safety Disclosures

None

Item 5. Other Information

None

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(a) Exhibits

		Incorporated by Reference
Exhibit Number	Description of Document	Schedule/Form	File Number	Exhibits	Filing Date
4.1	Indenture, dated April 7, 2022, between the Company and Wilmington Trust, National Association, as trustee (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed with the SEC on April 13, 2022)	Form 8-K	File No. 001-39291	10.1	April 13, 2022
4.2	Convertible Promissory Note, dated as of June 13, 2022, between Eos Energy Enterprises, Inc. and YA II PN, LTD.	Form 8-K	File No. 001-39291	4.1	June 13, 2022
10.1	Standby Equity Purchase Agreement, dated April 28, 2022, by and between Eos Energy Enterprises, Inc. and YA II PN, Ltd. (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed with the SEC on April 28, 2022)	Form 8-K	File No. 001-39291	10.1	April 28, 2022
10.2*	Joinder to Investment Agreement, dated May 1, 2022 among Eos Energy Enterprises, Inc., Spring Creek Capital, LLC and Wood River Capital, LLC
10.3	Amendment No. 1 to the Standby Equity Purchase Agreement, dated as of April 28, 2022, between Eos Energy Enterprises, Inc. and YA II PN, LTD.	Form 8-K	File No. 001-39291	10.1	June 13, 2022
10.4	Supplemental Agreement, dated as of June 13, 2022, to the Standby Equity Purchase Agreement dated as of April 28, 2022 between Eos Energy Enterprises, Inc. and YA II PN, LTD.	Form 8-K	File No. 001-39291	10.2	June 13, 2022
10.5	Senior Secured Term Loan Credit Agreement, dated as of July 29, 2022, by and among Eos Energy Enterprises, Inc., the lenders party thereto, and ACP Post Oak Credit I LLC, as administrative agent and collateral agent.	Form 8-K	File No. 001-39291	10.1	August 1, 2022
31.1*	Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2*	Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32*	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document

45

		Incorporated by Reference
Exhibit Number	Description of Document	Schedule/Form	File Number	Exhibits	Filing Date
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

____________________________

†Certain of the exhibits and schedules to this Exhibit have been omitted in accordance with Regulation S-K Item 601(a)(5). The Registrant agrees to furnish a copy of all omitted exhibits and schedules to the SEC upon its request.

*Filed herewith.

(b)Financial Statements. The financial statements filed as part of this registration statement are listed in the index to the financial statements immediately preceding such financial statements, which index to the financial statements is incorporated herein by reference.

46

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	EOS ENERGY ENTERPRISES, INC.
Date: August 1, 2022	By:	/s/ Joe Mastrangelo
	Name:	Joe Mastrangelo
	Title:	Chief Executive Officer and Director (Principal Executive Officer)

Date: August 1, 2022	By:	/s/ Randall Gonzales
	Name:	Randall Gonzales
	Title:	Chief Financial Officer (Principal Financial Officer)

47

EX-10.2

JOINDER TO INVESTMENT AGREEMENT This joinder (this “Joinder”) to the Investment Agreement (as defined below) is made as of the end of day May 1, 2022 between Spring Creek Capital, LLC (“Original Purchaser”) and Wood River Capital, LLC (“Succeeding Purchaser”). WHEREAS, the Original Purchaser is a party to that certain Investment Agreement, dated as of July 6, 2021 (the “Investment Agreement”), between Eos Energy Enterprises, Inc., a Delaware Corporation, and the Original Purchaser, attached hereto as Exhibit A; WHEREAS, pursuant to Section 4.02(a)(i) to the Investment Agreement, the Original Purchaser is transferring its rights and obligations under the Investment Agreement to its Affiliate, the Succeeding Purchaser (“Permitted Transfer”); and WHEREAS, Succeeding Purchaser is required, at the time of and as a condition to such Assignment, to become a party to the Investment Agreement by executing and delivering this Joinder, whereupon such Succeeding Purchaser will be treated as a Purchaser (with the rights and obligations as the Original Purchaser) for all purposes of the Investment Agreement. NOW, THEREFORE, in consideration of the foregoing and the respective covenants and agreements set forth herein, and intending to be legally bound hereby, the parties hereto agree as follows: Section 1.1 Definitions. To the extent capitalized terms used but not otherwise defined herein shall have the meanings provided in the Investment Agreement. Section 1.2 Assignment and Joinder. The Original Purchaser hereby assigns to the Succeeding Purchaser all of its rights and obligations under the Investment Agreement, and Succeeding Purchaser, by executing and delivering this Joinder, and upon acceptance hereof by the Company, agrees to become a party to, to be bound by and to comply with the Investment Agreement as an Investor, and shall be deemed to make all of the representations, warranties and covenants, as a Purchaser, in the same manner as if it were the original signatory of the Investment Agreement; provided, however, that such assignment will not relieve Original Purchaser of its obligations under the Investment Agreement in the event the Succeeding Purchaser fails to fully perform its obligations under the Investment Agreement. Section 1.3 Notice. Any notice, demand or other communication under the Investment Agreement to Succeeding Purchaser shall be given to Succeeding Purchaser at the address set forth on the signature page hereto in accordance with the Investment Agreement. Section 1.4 Counterparts; Electronic Delivery. This Joinder may be executed and delivered in one or more counterparts, by fax, email or other electronic transmission, each of which shall be deemed an original and all of which shall be considered one and the same agreement. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Joinder or any document to be signed in connection with this Joinder shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means. DocuSign Envelope ID: B934B1DC-FBC5-42A3-AC97-31428F834B40D5EC04A9 1875-4ABB 914D-4112C1 A6F97

In Witness Whereof, this Joinder has been duly executed and delivered by the parties as of the date first above written. SPRING CREEK CAPITAL, LLC By: Name: Eric Butcher Title: President WOOD RIVER CAPITAL, LLC By: Name: Eric Butcher Title: President Address for Notices: 4111 E 37th St N. Wichita, KS 67220 DocuSign Envelope ID: B934B1DC-FBC5-42A3-AC97-31428F834B40D5EC04A9 1875-4ABB 914D-4112C1 A6F97

Agreed and Accepted as of May 1, 2022 EOS ENERGY ENTERPRISES, INC. By: Name: Randall Gonzales Title: Chief Financial Officer DocuSign Envelope ID: B934B1DC-FBC5-42A3-AC97-31428F834B40D5EC04A9 1875-4ABB 914D-4112C1 A6F97

DocuSign Envelope ID: B934B1DC-FBC5-42A3-AC97-31428F834B40D5EC04A9 1875-4ABB 914D-4112C1 A6F97

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph Mastrangelo, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Eos Energy Enterprises, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 1, 2022	By:	/s/ Joseph Mastrangelo
		Joseph Mastrangelo
		Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF

THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Randall Gonzales, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Eos Energy Enterprises, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 1, 2022	By:	/s/ Randall Gonzales
		Randall Gonzales
		Chief Financial Officer
		(Principal Financial Officer)

EX-32

EXHIBIT 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Eos Energy Enterprises, Inc., for the quarterly period ended June 30, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Joseph Mastrangelo, as Chief Executive Officer of Eos Energy Enterprises, Inc., hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Eos Energy Enterprises, Inc.

Date: August 1, 2022	By:	/s/ Joseph Mastrangelo
		Joseph Mastrangelo
		Chief Executive Officer
		(Principal Executive Officer)

In connection with the Quarterly Report on Form 10-Q of Eos Energy Enterprises, Inc., for the quarterly period ended June 30, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Randall Gonzales, as Chief Financial Officer of Eos Energy Enterprises, Inc., hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Eos Energy Enterprises, Inc.

Date: August 1, 2022	By:	/s/ Randall Gonzales
		Randall Gonzales
		Chief Financial Officer
		(Principal Financial Officer)

XML

Cover - shares	6 Months Ended
	Jun. 30, 2022	Jul. 27, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-39291
Entity Registrant Name	EOS ENERGY ENTERPRISES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-4290188
Entity Address, Address Line One	3920 Park Avenue
Entity Address, City or Town	Edison
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08820
City Area Code	732
Local Phone Number	225-8400
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		59,650,960
Entity Central Index Key	0001805077
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Common stock
Document Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.0001 per share
Trading Symbol	EOSE
Security Exchange Name	NASDAQ
Warrants
Document Information [Line Items]
Title of 12(b) Security	Warrants, each exercisable for one share of common stock
Trading Symbol	EOSEW
Security Exchange Name	NASDAQ

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 16,273	$ 104,831
Restricted cash	1,255	861
Accounts receivable, net	2,596	1,916
Inventory, net	12,941	12,976
Vendor deposits	22,961	16,653
Notes receivable, net	115	103
Prepaid expenses	1,767	2,595
Other current assets	2,548	2,637
Total current assets	60,456	142,572
Property, plant and equipment, net	20,992	12,890
Intangible assets, net	260	280
Goodwill	4,331	4,331
Security deposits, net	1,226	1,239
Notes receivable, long-term, net	3,740	3,547
Operating lease right-of-use asset, net	4,772	3,468
Other assets, net	1,963	848
Total assets	97,740	169,175
Current liabilities:
Accounts payable	29,088	12,531
Accrued expenses	14,689	7,674
Accounts payable and accrued expenses - related parties	0	1,200
Operating lease liability, current portion	1,013	1,084
Note payable, current portion	4,839	4,926
Long-term debt, current portion	1,765	1,644
Convertible note payable, current portion - related party	7,333	0
Contract liabilities, current portion	879	849
Other current liabilities	13	9
Total current liabilities	59,619	29,917
Long-term liabilities:
Operating lease liability, long-term	4,705	3,224
Note payable, excluding current portion	9,177	13,769
Long-term debt, excluding current portion	3,816	4,727
Convertible notes payable - related party	77,205	84,148
Contract liabilities, long-term	876	0
Warrants liability - related party	89	926
Other liabilities	82	17
Total long-term liabilities	95,950	106,811
Total liabilities	155,569	136,728
COMMITMENTS AND CONTINGENCIES (NOTE 9)
SHAREHOLDERS' EQUITY (DEFICIT)
Common Stock, $0.0001 par value, 300,000,000 and 200,000,000 shares authorized, 58,519,739 and 53,786,632 shares outstanding at June 30, 2022 and December 31, 2021, respectively	6	5
Preferred stock, $0.0001 par value, 1,000,000 shares authorized, no shares outstanding at June 30, 2022 and December 31, 2021	0	0
Additional paid in capital	461,165	448,969
Accumulated deficit	(519,005)	(416,527)
Accumulated other comprehensive income	5	0
Total shareholders' equity (deficit)	(57,829)	32,447
Total liabilities and shareholders' equity (deficit)	$ 97,740	$ 169,175

XML

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	300,000,000	200,000,000
Common stock, shares issued (in shares)	58,519,739	53,786,632
Common stock, shares outstanding (in shares)	58,519,739	53,786,632
Preferred stock issued per unit (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue
Total revenue	$ 5,895	$ 612	$ 9,193	$ 776
Costs and expenses
Cost of goods sold	36,866	12,364	72,443	12,453
Research and development expenses	5,464	3,647	10,427	8,700
Selling, general and administrative expenses	19,115	11,325	33,394	20,127
Loss on pre-existing agreement	0	22,516	0	30,368
Loss from write-down of property, plant and equipment	1,997	0	2,005	11
Grant (income) expense, net	(169)	(52)	4	(44)
Total costs and expenses	63,273	49,800	118,273	71,615
Operating loss	(57,378)	(49,188)	(109,080)	(70,839)
Other income (expense)
Interest expense, net	(284)	(154)	(622)	(175)
Interest expense - related party	(2,664)	0	(4,838)	0
Remeasurement of equity method investment	0	(7,480)	0	(7,480)
Change in fair value, embedded derivative - related party	3,978	0	11,673	0
Change in fair value, warrants liability - related party	270	585	837	361
Income from equity in unconsolidated joint venture	0	0	0	440
Sale of state tax attributes	0	2,194	0	2,194
Other income (expense)	(632)	0	(513)	0
Loss before income taxes	(56,710)	(54,043)	(102,543)	(75,499)
Income tax benefit	23	0	65	0
Net loss	(56,687)	(54,043)	(102,478)	(75,499)
Other comprehensive income
Foreign currency translation adjustment, net of tax	5	0	5	0
Comprehensive loss	$ (56,682)	$ (54,043)	$ (102,473)	$ (75,499)
Basic and diluted loss per share attributable to common shareholders
Basic (in dollars per share)	$ (1.01)	$ (1.04)	$ (1.86)	$ (1.46)
Diluted (in dollars per share)	$ (1.01)	$ (1.04)	$ (1.86)	$ (1.46)
Weighted average shares of common stock
Basic (in shares)	56,021,185	51,792,365	54,991,475	51,630,088
Diluted (in shares)	56,021,185	51,792,365	54,991,475	51,630,088

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Total	Common stock	Additional Paid-in Capital	Contingently Issuable Common Stock	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		48,943,082
Beginning balance at Dec. 31, 2020	$ 120,785,000	$ 5,000	$ 395,491,000	$ 17,600,000	$ 0	$ (292,311,000)
Increase (decrease) in stockholders' equity [Roll Forward]
Stock-based compensation	5,673,000		5,673,000
Release of Block B Sponsor Earnout Shares from restriction (in shares)		859,000
Issuance of contingently issuable common stock (in shares)		1,999,185
Issuance of Contingently Issuable Common Stock			17,600,000	(17,600,000)
Exercise of stock options (in shares)		87,177
Exercise of warrants	756,000		756,000
Exercise of warrants (in shares)		1,465,414
Exercise of warrants	16,852,000		16,852,000
Cancellation of shares used to settle payroll tax withholding	0
Foreign currency translation adjustment, net of tax	0
Net loss	(75,499,000)					(75,499,000)
Ending balance (in shares) at Jun. 30, 2021		53,353,858
Ending balance at Jun. 30, 2021	68,567,000	$ 5,000	436,372,000	0	0	(367,810,000)
Beginning balance (in shares) at Mar. 31, 2021		51,801,267
Beginning balance at Mar. 31, 2021	101,807,000	$ 5,000	415,569,000	0	0	(313,767,000)
Increase (decrease) in stockholders' equity [Roll Forward]
Stock-based compensation	3,195,000		3,195,000
Exercise of stock options (in shares)		87,177
Exercise of warrants	756,000		756,000
Exercise of warrants (in shares)		1,465,414
Exercise of warrants	16,852,000		16,852,000
Cancellation of shares used to settle payroll tax withholding	0
Foreign currency translation adjustment, net of tax	0
Net loss	(54,043,000)					(54,043,000)
Ending balance (in shares) at Jun. 30, 2021		53,353,858
Ending balance at Jun. 30, 2021	$ 68,567,000	$ 5,000	436,372,000	0	0	(367,810,000)
Beginning balance (in shares) at Dec. 31, 2021	53,786,632	53,786,632
Beginning balance at Dec. 31, 2021	$ 32,447,000	$ 5,000	448,969,000	0	0	(416,527,000)
Increase (decrease) in stockholders' equity [Roll Forward]
Stock-based compensation	7,377,000		7,377,000
Exercise of warrants (in shares)		600
Exercise of warrants	7,000		7,000
Release of restricted stock units (in shares)		427,607
Cancellation of shares used to settle payroll tax withholding (in shares)		(128,156)
Cancellation of shares used to settle payroll tax withholding	(852,000)		(852,000)
Issuance of common stock under SEPA (in shares)		3,967,939
Issuance of common stock under SEPA	4,604,000	$ 1,000	4,603,000
Commitment fee for SEPA settled by common stock (in shares)		465,117
Commitment fee for SEPA settled by common stock	1,061,000		1,061,000
Foreign currency translation adjustment, net of tax	5,000				5,000
Net loss	$ (102,478,000)					(102,478,000)
Ending balance (in shares) at Jun. 30, 2022	58,519,739	58,519,739
Ending balance at Jun. 30, 2022	$ (57,829,000)	$ 6,000	461,165,000	0	5,000	(519,005,000)
Beginning balance (in shares) at Mar. 31, 2022		53,980,608
Beginning balance at Mar. 31, 2022	(10,220,000)	$ 5,000	452,093,000	0	0	(462,318,000)
Increase (decrease) in stockholders' equity [Roll Forward]
Stock-based compensation	3,434,000		3,434,000
Exercise of warrants (in shares)		0
Release of restricted stock units (in shares)		121,956
Cancellation of shares used to settle payroll tax withholding (in shares)		(15,881)
Cancellation of shares used to settle payroll tax withholding	(26,000)		(26,000)
Issuance of common stock under SEPA (in shares)		3,967,939
Issuance of common stock under SEPA	4,604,000	$ 1,000	4,603,000
Commitment fee for SEPA settled by common stock (in shares)		465,117
Commitment fee for SEPA settled by common stock	1,061,000		1,061,000
Foreign currency translation adjustment, net of tax	5,000				5,000
Net loss	$ (56,687,000)					(56,687,000)
Ending balance (in shares) at Jun. 30, 2022	58,519,739	58,519,739
Ending balance at Jun. 30, 2022	$ (57,829,000)	$ 6,000	$ 461,165,000	$ 0	$ 5,000	$ (519,005,000)

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (102,478)	$ (75,499)
Adjustment to reconcile net loss to net cash used in operating activities
Stock-based compensation	7,377	5,673
Depreciation and amortization	2,266	1,097
Loss from write-down of property, plant and equipment	2,005	11
Non-cash lease expense	409	396
Income from equity in unconsolidated joint venture	0	(440)
Remeasurement of equity method investment	0	7,480
Amortization of debt discount	1,548	0
Amortization of debt issuance cost- related party	204	0
Commitment fee for SEPA agreement settled by common stock- related party	1,061	0
Change in fair value, embedded derivative - related party	(11,673)	0
Change in fair value, warrants liability - related party	(837)	(361)
Changes in operating assets and liabilities:
Prepaid expenses	827	761
Inventory	35	(1,554)
Accounts receivable	(686)	(170)
Vendor deposits	(5,268)	(3,221)
Security deposits	13	(15)
Accounts payable	14,734	2,380
Accrued expenses	7,020	1,540
Accounts payable and accrued expenses - related parties	(1,200)	(2,517)
Provision for firm purchase commitments	0	(3,445)
Operating lease liabilities	(303)	(374)
Contract liabilities	906	1,263
Note payable	(4,679)	18,365
Other customer receivable	0	0
Other	1,727	(257)
Net cash used in operating activities	(86,992)	(48,887)
Cash flows from investing activities
Investment in notes receivable	(261)	(4,083)
Business acquisition, net of cash acquired	0	(160)
Investment in joint venture	0	(4,000)
Purchases of property, plant and equipment	(11,497)	(7,541)
Net cash used in investing activities	(11,758)	(15,784)
Cash flows from financing activities
Principal payments on finance (capital) lease obligations	(6)
Principal payments on finance (capital) lease obligations		(6)
Proceeds from exercise of stock options	0	756
Proceeds from exercise of public warrants	7	16,852
Proceeds from issuance of convertible notes - related party, net of issuance cost	7,225	0
Issuance of common stock under the SEPA	5,000	0
Repurchase of shares from employees for income tax withholding purposes	(852)	0
Repayment of other financing	0	(94)
Repayment of equipment financing facility	(790)	0
Net cash provided by financing activities	10,584	17,508
Effect of exchange rate changes on cash and cash equivalents	2	0
Net decrease in cash, cash equivalents and restricted cash	(88,164)	(47,163)
Cash, cash equivalents and restricted cash, beginning of the period	105,692	121,853
Cash, cash equivalents and restricted cash, end of the period	17,528	74,690
Non-cash investing and financing activities
Accrued and unpaid capital expenditures	2,402	0
Issuance of convertible notes for interest paid in kind	3,087	0
Fixed assets acquired with finance lease	70	0
Right-of-use operating lease assets in exchange for lease liabilities	2,112	4,351
Supplemental disclosures
Cash paid for interest	$ 434	$ 233

XML

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 16,273	$ 104,831	$ 74,690
Restricted cash	1,255	861	0
Total cash, cash equivalents and restricted cash	$ 17,528	$ 105,692	$ 74,690	$ 121,853

XML

Nature of Operations and Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2022

Accounting Policies [Abstract]

Nature of Operations and Summary of Significant Accounting Policies

Nature of Operations and Summary of Significant Accounting Policies

Nature of Operations

Eos Energy Enterprises, Inc. (the “Company” or "Eos") designs, develops, manufactures, and sells innovative energy storage solutions for utility-scale microgrid, and commercial & industrial (“C&I”) applications. Eos has developed a broad range of intellectual property with multiple patents ranging from the unique battery chemistry, mechanical product design, energy block configuration and software operating system (Battery Management System). The Battery Management System (“BMS”) software uses proprietary Eos-developed algorithms and includes ambient and battery temperature sensors, as well as voltage and electrical current sensors for the strings and the system. Eos focuses on developing and selling safe, reliable, long-lasting and low-cost turn-key alternating current (“AC”) integrated systems using Eos’ direct current (“DC”) battery energy storage system. The Company has a manufacturing facility in Turtle Creek, Pennsylvania to produce DC energy blocks with an integrated BMS. The Company’s primary applications focus on integrating battery storage solutions with: (1) renewable energy systems that are connected to the utility power grid; (2) renewable energy systems that are not connected to the utility power grid; (3) energy systems utilized to relieve congestion; and (4) storage systems to assist C&I customers in reducing their peak energy usage or participating in the utilities ancillary and demand response markets. The Company’s major market is North America with opportunistic growth opportunities in Europe, Oceania, Africa, and Asia.

Unless the context otherwise requires, the use of the terms “Eos”, “the Company”, “we,” “us,” and “our” in these notes to the unaudited condensed consolidated financial statements refers to Eos Energy Enterprises, Inc. and its consolidated subsidiaries.

Liquidity and Going Concern

The Company continues to rapidly scale its operations, including deploying capital for capacity expansion to meet the current demand from customers. To date, the Company has had limited revenue generating activities. Accordingly, the Company has incurred significant recurring losses and net operating cash outflows from operations. Operating expenses consist primarily of costs related to the Company’s sales of its battery energy storage system and related services, research and development costs and recurring general and administrative expenses. Management and the Company’s Board of Directors expect the Company will eventually reach a scale of profitability through the sale of battery energy storage systems and other complementary products and services, and therefore, the Company believes the current stage of the Company’s lifecycle justifies continued intensive investment in the development and launch of products. Accordingly, the Company expects to continue to incur significant losses and net operating cash outflows from operations for the foreseeable future and to continue to require additional capital to fund the Company’s operations and obligations as they become due, including funding that is necessary to continue to scale up the Company’s operations to allow for the delivery of order backlog, to secure additional order opportunities for its battery storage systems, and to continue to invest in research and development.

As of June 30, 2022, the Company had total assets of $97,740, which includes total cash and cash equivalents of $16,273, total liabilities of $155,569, which includes the total amounts owed on the Company’s outstanding convertible notes payable of $84,538 (see Note 14), notes payable of $14,016 (see Note 15) and long-term debt of $5,581 (see Note 16) and a total accumulated deficit of $(519,005), which is primarily attributable to the significant recurring losses the Company has accumulated since inception. The Company has historically relied on outside capital to fund its cost structure and expects this reliance to continue for the foreseeable future until the Company reaches profitability through its planned revenue generating activities. However, as of the date the accompanying condensed consolidated financial statements were issued, management concluded that the Company did not have sufficient capital on hand to support its current cost structure for one year after the date the accompanying condensed consolidated financial statements were issued.

As previously disclosed, the Company continues its efforts to secure additional financing. In July 2022, the Company secured an $85,106 senior secured term loan credit agreement to fund the Company’s manufacturing capacity, repay an existing outstanding note, and for general corporate purposes. Based on the Company’s current financial projections, which are consistent with previous assessments, the Company will continue to seek additional capital to fund its operations or defer or reduce cash expenditures in the second half of 2022 to continue our operations.

The Company believes these uncertainties raise substantial doubt about the Company’s ability to continue as a going concern. If the Company is unable to raise additional capital, on acceptable terms, or at all, the Company may have to significantly delay, scale back or ultimately discontinue the development or commercialization of its product and/or consider a sale or other strategic transaction. The Company continues to pursue various funding options to raise additional capital to support its operations. As previously reported, the Company has moved through Part I of the application under the U.S. Department of Energy’s Loan Guarantee Solicitation for Applications for Renewable Energy Projects and Efficient Energy Projects (the “DOE Loan Program”), and submitted an application under Part II of the loan program in May 2022. In addition, on April 28, 2022, the Company entered into a $200,000 common stock standby equity purchase agreement (the “Original SEPA”) with an affiliate of Yorkville Advisors (“Yorkville”), which was subsequently amended on June 13, 2022 (the “Amendment” and, together with the Original SEPA, the “SEPA”) (see Note 12). There can be no assurance that the Company will successfully complete Part II of the DOE Loan Program or that the Company will be able to utilize the SEPA to its full $200,000 capacity, or otherwise be able to obtain new funding from other sources on terms acceptable to us, on a timely basis, or at all.

The accompanying condensed consolidated financial statements have been prepared on the basis that we will continue to operate as a going-concern, which contemplates we will be able to realize assets and settle liabilities and commitments in the normal course of business for the foreseeable future. The accompanying condensed consolidated financial statements do not include any adjustments that may result from the outcome of these uncertainties.

Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts of the Company and its 100% owned, direct and indirect subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). All intercompany transactions and balances have been eliminated in the preparation of the condensed consolidated financial statements. These statements reflect all adjustments, consisting of normal recurring adjustments, which, in the opinion of management, are necessary for fair presentation of the information contained therein. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. These interim results are not necessarily indicative of results for the full year.

Reclassification of Prior Year Presentation

Certain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations.

Foreign Currency Translation

We follow the provisions of ASC 830, Foreign Currency Matters. Our foreign subsidiaries use the local currency of their respective countries as their functional currency. The assets and liabilities of foreign operations are translated at the exchange rates in effect at the balance sheet date. The operating results of foreign operations are translated at weighted average exchange rates. The related translation gains or losses are reported as a separate component of shareholders’ equity (deficit) in accumulated other comprehensive loss. Gains and losses from foreign currency transactions, which were insignificant for the three and six months ended June 30, 2022 and 2021, are included as other income (expense) in the condensed consolidated statements of operations and comprehensive loss.

Recently Adopted Accounting Pronouncements

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), using the transition method introduced by ASU 2018-11, which does not require revisions to comparative periods. The adoption of the new standard resulted in the recording of lease assets and lease liabilities of $3,662 and $4,465, respectively, as of January 1, 2021. The difference between the lease assets and lease liabilities primarily relates to deferred rent recorded in accordance with the previous leasing guidance. The new standard did not materially impact our condensed consolidated statements of operations or statements of cash flows.

On January 1, 2021, the Company adopted ASU No. 2016-13, Financial Instruments-Credit Losses (“Topic 326”), and the subsequent amendments. The standard sets forth an expected credit loss model which requires the measurement of expected credit losses for financial instruments based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost, and certain off-balance sheet credit exposures. The adoption of this standard did not have a material impact on our condensed consolidated financial statements.

Recent Accounting Pronouncements

As of June 30, 2022, the Company implemented all applicable new accounting standards and updates issued by the Financial Accounting Standards Board (“FASB”) that were in effect. There were no new standards or updates adopted during the six months ended June 30, 2022 that had a material impact on our condensed consolidated financial statements.

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Acquisition

6 Months Ended

Jun. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisition

Acquisition

As previously reported, on April 8, 2021, the Company entered into a unit purchase agreement (the “Purchase Agreement”) with Holtec Power, Inc. (“Holtec”), in accordance with the terms and conditions of which the Company purchased from Holtec the remaining 51% interest in HI-POWER, LLC (“Hi-Power”) that was not already owned by the Company. Hi-Power was incorporated as a joint venture between the Company and Holtec in 2019 (see Note 7). In connection with the transaction, the Company also entered into a transition services agreement and a sublease with Holtec. The transaction closed on April 9, 2021 (“Acquisition Date”). Following the consummation of the transactions set forth in the Purchase Agreement (the “Transactions”), Hi-Power became a 100% indirect, wholly-owned subsidiary of the Company and the obligations of the parties under the Hi-Power joint venture terminated.

The Purchase Agreement provided that the Company pay an aggregate purchase price of $25,000 for Holtec’s 51% interest in Hi-Power, pursuant to the following schedule: $5,000 on each of May 31, 2021, May 31, 2022, May 31, 2023, May 31, 2024, and May 31, 2025, evidenced by a secured promissory note secured by the assets of the Company. The Purchase Agreement also required that the Company pay to Holtec, on the closing of the Transactions, an amount in cash equal to $10,283. Payments to Holtec under this Purchase Agreement totaled $35,283. The fair value of these payments was $33,474 at the Acquisition Date and included $32,750 allocated to the termination of a pre-existing agreement with Holtec and $724 allocated to the acquisition.

The obligations and rights of both parties under the pre-existing Joint Venture Agreement were terminated at the time of acquisition and $32,750 of the fair value of the consideration transferred was allocated to the termination of the agreement, which resulted in a loss on the pre-existing agreement of $22,516 and $30,368 for the three and six months ended June 30, 2021, respectively. The Company paid $10,283 on the date of closing and $5,000 on each of May 31, 2021 and May 31, 2022. The present value of the remaining obligation was recorded as debt, which includes a current portion of $4,839 and a long-term portion of $9,177 as of June 30, 2022.

Prior to the acquisition of the remaining 51% ownership interest in Hi-Power, the Company accounted for its initial 49% ownership interest in Hi-Power as an unconsolidated joint venture under the equity method of accounting (see Note 7). In connection with the acquisition of the remaining 51% ownership interest in Hi-Power, the Company’s condensed consolidated financial statements include all of the accounts of Hi-Power, and all intercompany balances and transactions have been eliminated in consolidation. The results of operations of Hi-Power have been included in the Company’s condensed consolidated financial statements since the date of acquisition.

The consideration transferred for the 100% ownership interest in connection with the acquisition, net of intercompany balances between the Company and Hi-Power, totaled $418, of which $205 represents the fair value of the Company’s previously held 49% ownership interest in Hi-Power. In accordance with Accounting Standards Codification (“ASC”) 805, Business Combinations, we remeasured the previously held 49% ownership interest in Hi-Power at its acquisition date fair value. As of the acquisition date, a loss of $7,480 was recognized in earnings for the remeasurement of the previously held 49% ownership interest.

The following table summarizes the final allocation of the purchase price to the fair values of the assets acquired and liabilities assumed as of the Acquisition Date.

	Amount
Inventory	$	2,666
Vendor deposits	818
Property, plant and equipment, net	74
Goodwill	4,331
Accounts payable and accrued expenses	(3,634)
Provision for firm purchase commitments	(3,890)
Net assets acquired, net of cash and cash equivalents of $53 1	$	365

The Company expects the goodwill recognized as part of the acquisition will be deductible for U.S. income tax purposes. The Company also incurred insignificant non-consideration acquisition expenses including legal and accounting services related to the acquisition, which are recorded in selling, general and administrative expenses on the Company’s condensed consolidated statements of operations.

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Revenue Recognition

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue RecognitionThe Company primarily earns revenue from sales of its energy storage systems and services including installation, commissioning, and extended warranty services. Product revenues, which are recognized at a point in time, and service revenues, which are recognized over time, are as follows:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Product revenue	$	5,771	$	599	$	9,065	$	763
Service revenue	124		13		128		13
Total	$	5,895	$	612	$	9,193	$	776

For contracts for which revenue is recognized over time, the Company performs reviews of the progress and execution of its performance obligations under these contracts periodically. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities and the related changes in estimates of revenues and costs. Based upon these reviews, if at any time management determines that in the case of a particular contract total costs will exceed total contract revenue, a provision for the entire anticipated contract loss is recorded at that time. The Company recognized losses from contracts of $1,249 for the three and six months ended June 30, 2022, respectively. No loss was recognized for the three and six months ended June 30, 2021.

For the three months ended June 30, 2022, we had one customer who accounted for 89.6% of the total revenue and for the six months ended June 30, 2022, we had two customers who accounted for 73.1% and 12.7% of the total revenue, respectively.

For the three months ended June 30, 2021, we had one customer who accounted for 100% of the total revenue and for the six months ended June 30, 2021, we had two customers who accounted for 78.8% and 21.2% of the total revenue, respectively.

Contract assets and Contract liabilities

The following table provides information about contract assets and contract liabilities from contracts with customers. Contract assets are included in other current assets and contract liabilities are included separately on the condensed consolidated balance sheets.

	June 30, 2022		December 31, 2021
Contract assets	$	938	$	1,369
Contract liabilities	$	1,755	$	849

The Company recognizes contract assets for certain contracts in which revenue recognition performance obligations have been satisfied, however, invoicing to the customer has not yet occurred. Contract liabilities primarily relate to advance consideration received from customers in advance of the Company’s satisfying performance obligations under contractual arrangements. Contract balances are reported in a net contract asset or liability position on a contract-by-contract basis at the end of each reporting period.

Contract assets decreased by $431 during the six months ended June 30, 2022 due to reclassifications to accounts receivable from billings on existing contracts. Contract liabilities increased by $906 during the six months ended June 30, 2022, reflecting $1,159 in customer billings, which were not recognized as revenue during the period, offset by the recognition of $253 of revenue during the six months ended June 30, 2022 that was included in the contract liability balance at the beginning of the period.

Contract liabilities of $879 as of June 30, 2022 are expected to be recognized within the next twelve months. $876 of long-term contract liabilities are expected to be recognized as revenue over approximately the next two years.

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Inventory

6 Months Ended

Jun. 30, 2022

Inventory Disclosure [Abstract]

Inventory

Inventory

The following table provides information about inventory balances:

	June 30, 2022		December 31, 2021
Raw materials	$	12,429	$	11,898
Work-in-process	167		43
Finished goods	345		1,035
Total Inventory, net	$	12,941	$	12,976

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Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

As of June 30, 2022 and December 31, 2021, property, plant and equipment, net consisted of the following:

	2022		2021		Useful lives
Equipment	$	20,071	$	13,489	3	—	10 years
Finance lease	296		226		5 years
Furniture	1,396		808		5	—	10 years
Leasehold Improvements	4,114		2,933		Lesser of useful life/remaining lease
Tooling	3,385		3,053		2	—	3 years
Total	29,262		20,509
Less: Accumulated Depreciation	(8,270)		(7,619)
Total Property, Plant and Equipment, net	$	20,992	$	12,890

Depreciation and amortization expense related to property, plant and equipment was $1,261 and $602 for the three months ended June 30, 2022 and 2021, respectively, and $2,246 and $1,077 for the six months ended June 30, 2022 and 2021, respectively.

For the three and six months ended June 30, 2022, the Company recorded a loss from write-down of property, plant and equipment of $1,997 and $2,005, respectively. For the three and six months ended June 30, 2021, the loss from write-down of property, plant and equipment was $— and $11, respectively.

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Intangible Assets

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets consist of various patents valued at $400, which represents the cost to acquire the patents. These patents are determined to have useful lives and are amortized into the results of operations over ten years. The company recorded amortization expense of $10 for each period for the three months ended June 30, 2022 and 2021, respectively, and $20 for each period for the six months ended June 30, 2022 and 2021 related to patents, respectively.

Estimated future amortization expense of intangible assets as of June 30, 2022 are as follows:

Remainder of 2022	$	20
2023	40
2024	40
2025	40
2026	40
Thereafter	80
Total	$	260

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Investment in Unconsolidated Joint Venture

6 Months Ended

Jun. 30, 2022

Equity Method Investments and Joint Ventures [Abstract]

Investment in Unconsolidated Joint Venture

Investment in Unconsolidated Joint Venture

In August 2019, the Company entered into an agreement with Holtec to form the unconsolidated joint venture HI-POWER LLC (“Hi-Power” or “JV”). The JV was formed in order to manufacture the Company’s products for its projects in North America. Accordingly, the Company had purchased battery energy storage systems and spare parts from the JV. The facility is located in Turtle Creek, Pennsylvania. The Company’s financial commitment to the JV upon inception was $4,100 in the form of a combination of cash and special purpose manufacturing equipment. The Company’s initial ownership interest was 49%. On April 9, 2021, the Company acquired the remaining 51% ownership interest and Hi-Power became a wholly-owned subsidiary thereafter. Refer to Note 2 for the acquisition details.

For the three and six months ended June 30, 2021, contributions made to the JV were $— and $4,000, respectively. The investment income recognized from the unconsolidated joint venture under the equity method of accounting was $— and $440 for the three and six months ended June 30, 2021, respectively.

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Notes Receivable, Net and Variable Interest Entities (“VIEs”) Consideration

6 Months Ended

Jun. 30, 2022

Receivables [Abstract]

Notes Receivable, Net and Variable Interest Entities (“VIEs”) Consideration

Notes Receivable, Net and Variable Interest Entities (“VIEs”) Consideration

Notes receivable consist primarily of amounts due to us related to the financing we offered to customers. We report notes receivable at the principal balance outstanding less an allowance for losses. The estimate of credit losses is based on historical trends, customers’ financial condition and current economic trends, all of which are subject to change. We charge interest at a fixed rate and interest income is calculated by applying the effective rate to the outstanding principal balance.

The Company had notes receivable of $3,855 and $3,650 outstanding as of June 30, 2022 and December 31, 2021, respectively. As of June 30, 2022 and December 31, 2021, the Company recorded an allowance for expected credit loss from the notes receivable of $7 and $6, respectively.

The customers to whom we offer financing through notes receivables are VIEs. However, the Company is not the primary beneficiary, because we do not have power to direct the activities of the VIEs that most significantly impact the VIEs’ economic performance. The VIEs are not consolidated into the Company’s consolidated financial statements but rather disclosed in the notes to our consolidated financial statements under ASC 810, Consolidation. The maximum loss exposure is limited to the carrying value of notes receivable as of the balances sheet dates.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Lease Commitments

The Company has lease commitments under lease agreements. Refer to Note 19 for discussion.

Firm Purchase Commitment

To ensure adequate and timely supply of raw material for production, the Company, from time to time, enters into non-cancellable purchase and service contracts with vendors. As of June 30, 2022, the Company had open inventory purchase commitments of $173 under these contracts.

Minimum Volume Commitment

In June 2022, the Company entered into a long-term supply agreement with a minimum volume commitment with a third party, which provides services to process certain raw materials. Any purchase order issued under this supply agreement will be non-cancellable. To the extent the Company fails to order the guaranteed minimum volume defined in the contract at the end of the term, the Company is required to pay the counterparty an amount equal to the shortfall, if any, multiplied by a fee. As of June 30, 2022, the Company had an open purchase commitment of $232 under this agreement. The Company believes that the probability of failing to meet the minimum volume commitment is remote and no shortfall penalty has been accrued for.

Legal Proceedings

On July 7, 2022, the Company entered into a settlement agreement with the U.S. Department of Justice (the “DOJ”) and Vincent Icolari (“Relator”) to resolve the previously disclosed investigation by the DOJ for underpayment of certain custom duties in past years in connection with imports of batteries and battery components manufactured abroad. The investigation resulted from a qui tam lawsuit (the “Civil Action”) filed by the Relator in December 2019 alleging violations of the False Claims Act.

Pursuant to the terms of the settlement agreement, the Company has agreed to pay a total of $1,017 to the United States Department of Justice and $70 to Relator’s counsel. Upon receipt of such payments, the DOJ and the Relator have agreed to release the Company from civil monetary and administrative claims under the False Claims Act and the Relator has agreed to release the Company from any claims related to the Civil Action. The Company had estimated the settlement amount and accrued it in the previously filed financial statement and the settlement amount and legal fees were included in accrued expenses on the condensed consolidated balance sheets as of June 30, 2022.

In April 2022, the Company received a subpoena from the U.S. Securities and Exchange Commission requesting information regarding a variety of matters, including negotiations and agreements with customers and the Company’s disclosures to investors. The Company is fully cooperating with the investigation, which is at an early stage, and is endeavoring to address all inquiries raised by the SEC staff as expeditiously as possible.

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Grant Expense, Net

6 Months Ended

Jun. 30, 2022

Other Income and Expenses [Abstract]

Grant Expense, Net

Grant Expense, Net

From time-to-time, the Company has entered into grant agreements with the California Energy Commission (“CEC”) for conducting studies to demonstrate the benefits of certain energy-saving technologies to utility companies and consumers in the State of California. Under such agreements, the Company is entitled to receive reimbursement of costs incurred by the Company covered by the grants.

For the three and six months ended June 30, 2022, grant (income) expense, net was $(169) and $4, respectively. For the three and six months ended June 30, 2021, grant (income) expense, net was $(52) and $(44), respectively.

For the three and six months ended of June 30, 2022 and 2021, Eos has received no payments from the CEC. As of June 30, 2022 and December 31, 2021, the Company had grant receivables in the amounts of $1,250 and $1,020 which were included in other current assets, and deferred grant income of $183 and $—, which was included in accrued expenses on the condensed consolidated balance sheets, respectively. The expenses incurred by the Company related to the performance of studies in accordance with the respective grant agreements are offset, against the grants revenue received or receivable from the CEC for which the grant is intended to compensate the Company.

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Income Taxes

6 Months Ended

Jun. 30, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

For the three and six months ended June 30, 2022, the reported income tax benefit was $23 and $65, respectively. No income tax benefit or expense was recorded for the three and six months ended June 30, 2021. The income tax benefit differs from the amount computed by applying the statutory U.S. federal income tax rate of 21% to the loss before income taxes due to non-taxable gains, foreign operations, and pre-tax losses for which no tax benefit can be recognized for U.S. income tax purposes.

The Company estimates and applies the annual effective tax rate to its ordinary earnings each interim period. Any significant unusual or infrequent items, if any, are not included in the estimation of the annual effective tax rate. Rather, these items and their related income tax expense (benefit) are separately stated in the interim period in which they occur. The quarterly estimate of the annual effective tax rate and related tax expense is subject to variation due to a multitude of factors. Factors may include, but are not limited to, the inability to accurately predict the Company’s pre-tax and taxable income and loss.

At each balance sheet date, management assesses the likelihood that the Company will be able to realize its deferred tax assets. Management considered all available positive and negative evidence in assessing the need for a valuation allowance. The realization of deferred tax assets depends on the generation of sufficient taxable income of the appropriate character and in the appropriate taxing jurisdiction during the future periods in which the related temporary differences become deductible. Management has determined that it is unlikely that the Company will be able to utilize its U.S. deferred tax assets at June 30, 2022 and December 31, 2021 due to cumulative losses. Therefore, the Company has a valuation allowance against its net deferred tax assets.

As of June 30, 2022 and December 31, 2021, the Company has unrecognized tax benefits associated with uncertain tax positions that, if recognized, would not affect the effective tax rate on income from continuing operations. The Company is not currently under examination by any taxing jurisdiction, and none of the uncertain tax positions are expected to reverse within the next 12 months.

The Company files income tax returns in U.S. federal and various state jurisdictions, as well as Italy and India. The open tax years for federal returns is 2018 and forward, and open tax years for state returns is generally 2017 and forward. In addition, net operating losses generated in closed years and utilized in open years are subject to adjustment by the tax authorities.

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Related Party Transactions

6 Months Ended

Jun. 30, 2022

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

2021 Convertible Notes Payable

In July 2021, the Company issued $100,000 aggregate principal amount of convertible notes to Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries, Inc. (the “2021 Convertible Notes”). In connection with the 2021 Convertible Notes, the Company paid $3,000 to B. Riley Securities, Inc., a related party, who acted as a placement agent. This transaction was reviewed and approved as a related party transaction.

For the three and six months ended June 30, 2022, interest expense of $2,558 and $4,731 was recorded for the 2021 Convertible Notes, respectively. The change in fair value of the embedded derivative of $3,978 and $11,673 was recorded for the three and six months ended June 30, 2022 on the condensed consolidated statements of operations, respectively. Refer to Note 14 for more information.

Loss on pre-existing agreement

For the three and six months ended June 30, 2021, $22,516 and $30,368 was charged to loss on pre-existing agreement in connection with the acquisition of Hi-Power, respectively. Refer to Note 2 for the acquisition details.

Disgorgement of short swing profits

For the six months ended June 30, 2021, the Company received $432 from its then affiliated company B. Riley Securities, Inc. resulting from disgorgement of short swing profits under Section 16 (b) of the Exchange Act. This amount was recognized as an increase to Additional Paid in Capital as a capital contribution from stockholder when it was earned.

Warrants liability

The Company has private warrants issued to an affiliated company owned by B. Riley Financial, Inc. as of June 30, 2022 and December 31, 2021. Refer to Note 17 for details.

Settlement Agreement

As disclosed at the time of the Merger Agreement, prior to the execution and delivery of the Merger Agreement, certain unitholders (“Hellman Parties”) of Eos Energy Storage LLC (“EES”), a subsidiary of the Company, asserted claims (“Threatened Claims”) against another director and affiliated investors, including AltEnergy Storage VI, LLC (the "Securityholder Representative"), questioning the dilutive effect of certain historical security issuances on the former EES common unitholders.

Under the Merger Agreement, the Securityholder Representative had the obligation to defend against the Threatened Claims, and the Company had the obligation to advance or cause to be advanced to the Securityholder Representative up to $5,000 of defense costs, subject to a deductible of $2,000 (the "Deductible"), in connection with the investigation, defense, or settlement of any Threatened Claims. The Deductible was to be borne by the Company, and any additional amounts advanced were reimbursable by the former unitholders of EES.

On December 1, 2021, a Settlement Agreement was entered into between Hellman Parties and the Securityholder Representative pursuant to which, 300,000 Eos Shares (“Settlement Shares”) were to be transferred to the Hellman parties from the EES unitholders at the time of merger.

On December 28, 2021, the independent members of the Company’s Board of Directors approved a contribution of $1,200 towards the Settlement based on their determination that, among other reasons, this contribution (i) would ensure that the Company would not have to spend the entire $2,000 Deductible towards the costs of defense if the litigation were to continue, (ii) would avoid the distraction, uncertainty, and overhang of litigation relating to the Mergers, (iii) would benefit the Company’s future relationships with its long-term investors, and (iv) would generate future goodwill with such investors during an important growth stage of the Company. Because the Company’s contribution benefited certain Eos shareholders at the time of the Merger Agreement, including AltEnergy LLC and B. Riley Financial, Inc., this transaction was reviewed and approved as a related party transaction. On December 29, 2021, an amendment to the Settlement Agreement was entered into, pursuant to which, $1,200 of the value represented by the Settlement Shares was to be paid in cash, representing the equivalent of 140,023 of the Settlement Shares.

The Company accrued $1,200 in accounts payable and accrued expenses - related party on December 31, 2021, which has been paid on January 4, 2022. The remaining 159,977 in Settlement Shares were transferred to the Hellman Parties from the former EES unitholders, on a pro rata basis, on December 29, 2021.

Standby Equity Purchase Agreement (SEPA)

On April 28, 2022, the Company entered into the SEPA with YA II PN, Ltd. (“Yorkville”). Pursuant to the SEPA, the Company has the right, but not the obligation, to sell to Yorkville up to $200,000 of shares of its common stock at the Company’s request at any time during the commitment period, which commenced on April 28, 2022 and will end on the earlier of (i) May 1, 2024, or (ii) the date on which Yorkville shall have made payment of advances requested by the Company totaling up to the commitment amount of $200,000. Each sale the Company requests under the SEPA (an “Advance”) may be for a number of shares of common stock with an aggregate value of up to $20,000. The SEPA provides for shares to be sold to Yorkville at 97.0% of the Market Price (as defined below) and further provides that Yorkville cannot purchase any shares that would result in it owning more than 9.99% of the Company’s outstanding common stock at the time of an Advance (the "Ownership Limitation") or 19.99% of the Company's outstanding common stock as of the date of the SEPA (the "Exchange Cap"). The Exchange Cap will not apply under certain circumstances, including if the Company’s stockholders approve issuances in excess of the Exchange Cap. On June 28, 2022, shareholder approval was obtained to issue shares under the SEPA in excess of the Exchange Cap. “Market Price” is defined in the SEPA as the average of the VWAPs (as defined below) during each of the three consecutive trading days commencing on the trading day following the Company’s submission of an Advance notice to Yorkville. “VWAP” is defined in the SEPA to mean, for any trading day, the daily volume weighted average price of the Company’s common stock for such date on the Nasdaq Capital Market as reported by Bloomberg L.P. during regular trading hours.

In addition, subject to Yorkville’s consent, the Company may request one or more pre-advance loans in amounts not to exceed $50,000 (each, a “Pre-Advance Loan”) from Yorkville. Pursuant to the terms and conditions set forth in the SEPA and the accompanying promissory note, Pre-Advance Loans must be repaid with the proceeds from sales of equity to Yorkville, to the extent outstanding at the time of an Advance, or otherwise in cash. 465,117 shares were issued as consideration for its irrevocable commitment to purchase the Common Shares upon the terms and subject to the satisfaction of the conditions set forth in the SEPA.

As the Company has right, but not the obligation, to sell up to $200,000 of common stock to Yorkville, subject to certain limitations, at the time of our choosing during the term of the agreement, the Company determined that SEPA represents a derivative financial instrument under ASC 815, Derivatives and Hedging, which should be recorded at fair value at inception and each reporting date thereafter. The financial instrument was classified as a derivative asset with a fair value of zero at the inception of the SEPA and as of June 30, 2022. For the three and six months ended June 30, 2022, the Company has received cash of $5,000 from the issuance of 3,967,939 shares. Yorkville owned 4,433,056 shares of common stock or approximately 8% of the Company’s outstanding common stock after this issuance.

Supplemental Agreement to the SEPA and Promissory Note Issuance

On June 13, 2022, the Company issued and sold a convertible promissory note with an aggregate principal amount of $7,500 (the “Promissory Note” or “Yorkville Convertible Notes”) in a private placement to Yorkville under a supplemental agreement dated as of June 13, 2022 (the “Supplemental Agreement”) to the SEPA between the Company and Yorkville. The Supplemental Agreement gave Yorkville the right to deliver notices (each, an “Investor Notice”) requiring the Company to deliver an Advance notice under the SEPA for the issuance and sale of common stock for so long as there was an outstanding balance owed under the Promissory Note. The proceeds of any issuance of common stock pursuant to such Investor Notice will be used to repay amounts owed under the Promissory Note. For the three and six months ended June 30, 2022, interest expense of $108 was recorded for the Yorkville Convertible Notes. Refer to Note 14 for detail.

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Accrued Expenses

6 Months Ended

Jun. 30, 2022

Payables and Accruals [Abstract]

Accrued Expenses

Accrued Expenses

As of June 30, 2022 and December 31, 2021, accrued expenses consisted of the following:

	June 30, 2022		December 31, 2021
Accrued payroll	$	4,602	$	3,069
Warranty reserve	3,636		2,112
Accrued legal and professional expenses	3,595		826
Provision for contract losses	1,249		—
Other	1,607		1,667
Total	$	14,689	$	7,674

The following table summarizes warranty reserve activity:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Warranty reserve - beginning of period	$	3,240	$	66	$	2,112	$	—
Additions for current period deliveries	828		774		1,501		840
Changes in the estimate of warranty reserve	366		32		1,321		32
Warranty costs incurred	(798)		—		(1,298)		—
Warranty reserve - end of period	$	3,636	$	872	$	3,636	$	872

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Convertible Notes Payable - Related Party

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Convertible Notes Payable - Related Party

Convertible Notes Payable - Related Party

Yorkville Convertible Note

On June 13, 2022, the Company issued and sold the Promissory Note with a stated principal amount of $7,500 in a private placement to Yorkville (“Yorkville” or the “Holder”) under the Supplemental Agreement. The Promissory Note has a maturity date of September 15, 2022 (the “Maturity Date”). The Promissory Note was issued with a 2% original issue discount and bears interest only upon the occurrence of an Event of Default, as discussed below. The Company shall reimburse the Holder promptly for all fees, costs and expenses, including, without limitation, attorneys’ fees and expenses incurred by the Holder in connection with the Promissory Note if the Company fails to strictly comply with the terms of the Promissory Note. Total cash proceeds of $7,350 were received upon the issuance.

Mandatory Repayments - Six installments of $1,250 shall be made starting from August 11, 2022, ending on the Maturity Date. The Company may repay each installment amount in either cash or by delivering an Advance notice under the SEPA or in a combination of these two. Refer to Note 12 for details regarding the SEPA. An additional 3% payment premium applies to any installment amount paid in cash. If an installment is repaid in shares via delivery of an Advance notice, the payment premium does not apply. The Company accounts for the payment premium as principal.

Conversion Rights - Yorkville has the right, but not the obligation, to convert principal and accrued interest into shares of the Company’s common stock at a conversion price of $2.21 (the “Conversion Price”) any time prior to the Maturity Date, subject to the terms and conditions of the Promissory Note. At any time that there is an outstanding balance owed under the Promissory Note, the Holder may, pursuant to the terms of the Supplemental Agreement, deliver Investor Notices to require the Company to issue and sell shares of common stock under the SEPA at the Conversion Price in order to repay the amounts owed by the Company to the Holder under the Promissory Note. In addition, while there is an outstanding balance owed under the Promissory Note, the Company may use any Advance requested by the Company pursuant to the SEPA to repay the amounts owed by the Company to the Holder under the Promissory Note. Prior to June 28, 2022, the shares issuable upon conversion were subject to the Exchange Cap. Refer to Note 12 for details regarding the Exchange Cap.

Optional Redemption - The Company has the right, but not the obligation, to redeem (“Optional Redemption”) early a portion or all amounts outstanding under the Promissory Note provided that (i) the Company provides the Holder with at least five trading days’ prior written notice (each, a “Redemption Notice”) of its desire to exercise an Optional Redemption, and (ii) the VWAP of the Company’s common stock on each of the ten trading days immediately prior to the Redemption Notice is less than the conversion price.

Redemption upon Event of Default - Upon the occurrence of an Event of Default (as defined in the SEPA), interest will begin to accrue at a rate of 15% per year and Yorkville may elect to accelerate the repayment of each installment.

Embedded Derivatives - The number of shares issuable for conversion of the Promissory Notes is subject to the Exchange Cap limitation under the SEPA, unless shareholder approval is obtained. Therefore, at issuance, shareholder approval is an explicit input that can adjust the number of shares issuable upon settlement. Because shareholder approval is not an input that is indexed to the Company’s shares, the conversion feature is not indexed to the Company's own stock. Therefore, the conversion feature does not qualify for the scope exception to derivative accounting and bifurcation is required at issuance. On June 28, 2022, shareholder approval was obtained to issue shares under the SEPA in excess of the Exchange Cap. As such, upon the receipt of shareholder approval, the conversion feature no longer requires bifurcation and would be classified in equity.

In addition, upon the occurrence of an Event of Default, as defined in the Promissory Note, interest will begin to accrue at a rate of 15% per year and reimbursement of fees, cost and expenses incurred by the Holder in any action in connection with the Promissory Note are required if the Company fails to comply with the Promissory Note. An event of default and the nature of noncompliance includes events that are unrelated to Company’s credit worthiness and/or interest rates. Therefore, these features are not clearly and closely related to the debt host and bifurcation is required for this feature under the requirement of Accounting Standards Codification 815, Derivatives and Hedging (“ASC 815”).

Management concluded the fair value of the bifurcated embedded derivative described above as of the issuance date, June 28, 2022 and June 30, 2022 is de minimis.

Debt Issuance Costs - The Company incurred $125 of legal fees in connection with the issuance of the Promissory Note. No debt issuance costs were allocated to the embedded derivative due to the de minimis fair value and the full amount of the issuance cost were allocated to the Promissory Note. These costs were accounted for as debt issuance costs and recorded as a reduction to the initial carrying value of the Promissory Note.

The following table summarizes interest expense recognized for the three and six months ended June 30, 2022:

	For the Three and Six Months Ended June 30, 2022
Contractual interest expense	$	—
Amortization of debt discount	81
Amortization of debt issuance costs	27
Total	$	108

The Yorkville Convertible Note as of June 30, 2022 are comprised of the following:

	June 30, 2022
Principal-Installment	$	7,500
Principal- Payment Premium	225
Unamortized debt discount	(294)
Unamortized debt issuance costs	(98)
Aggregate carrying value	$	7,333

2021 Convertible Notes

As previously reported, on July 6, 2021, the Company entered into an investment agreement (the “Investment Agreement”) with Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries providing for the issuance and sale to Koch Industries of convertible notes in the aggregate principal amount of $100,000 (the “2021 Convertible Notes”). The transactions contemplated by the Investment Agreement closed on July 7, 2021 (the “Issue Date”). The maturity date of the 2021 Convertible Notes is June 30, 2026, subject to earlier conversion, redemption, or repurchase.

The Company estimated the fair value of the embedded conversion feature using a binomial lattice model at the inception and on subsequent valuation dates. This model incorporates inputs such as the stock price of the Company, dividend yield, risk-free interest rate, the effective debt yield and expected volatility. The effective debt yield and volatility involve unobservable inputs classified as Level 3 of the fair value hierarchy. Refer to Note 20 for definition of the fair value hierarchy. The assumptions used to determine the fair value of the embedded conversion feature as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022		December 31, 2021
Term	4.0 years		4.5 years
Dividend yield	—	%	—	%
Risk-free interest rate	3.0	%	1.2	%
Volatility	80.0	%	60.0	%
Effective debt yield	25.5	%	19.0	%

As of June 30, 2022 and December 31, 2021, the fair value of the embedded conversion feature was $707 and $12,359, respectively. The Company recognized a gain of $3,978 and $11,673 attributable to the change in fair value of the embedded conversion feature for the three and six months ended June 30, 2022, respectively.

The following table summarizes interest expense recognized:

	For the Three Months Ended June 30, 2022		For the Six Months Ended June 30, 2022
Contractual interest expense	$	1,544	$	3,087
Amortization of debt discount	924		1,467
Amortization of debt issuance costs	90		177
Total	$	2,558	$	4,731

The 2021 Convertible Notes as of June 30, 2022 and December 31, 2021 was comprised of the following:

	June 30, 2022		December 31, 2021
Principal	$	105,987	$	102,900
Unamortized debt discount	(26,876)		(28,321)
Unamortized debt issuance costs	(2,613)		(2,790)
Embedded conversion feature	707		12,359
Aggregate carrying value	$	77,205	$	84,148

The Company elected to repay the contractual interest due on June 30, 2022 in-kind as an increase to the principal amount. $3,087 of contractual interest attributable to the 2021 Convertible Notes was recorded as addition to the convertible notes payable - related party balance on the condensed consolidated balance sheets.

Long-term DebtLong-term debt consists of the outstanding balances from the previously-reported $25,000 equipment financing facility with Trinity Capital Inc. ("Trinity"). As of June 30, 2022, the Company had drawn $7,000 from the equipment financing facility with an effective interest rate of 14.3%. As of June 30, 2022 and December 31, 2021, total long-term debt was $5,581 and $6,371, with $1,765 and $1,644 of the principal recorded as a current liability on the condensed consolidated balance sheets, respectively. For the three and six months ended June 30, 2022, the Company recognized $205 and $424 as interest expense attributable to the equipment financing agreement, respectively. As of June 30, 2022, the unused commitment from the equipment financing facility was $18,000.

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Note Payable	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Note Payable	Note PayableIn connection with the Hi-Power acquisition (Refer to Note 2), the Company agreed to pay an aggregate purchase price of $25,000. $5,000 of the $25,000 purchase price was paid in May 2021. The fair value of the note payable was estimated using active market quotes, based on our current incremental borrowing rates for similar types of borrowing arrangements, which were Level 2 inputs. Refer to Note 20 for definition of the fair value hierarchy. Based on the analysis performed, the carrying value of the remaining payments of the note payable was recorded as debt, which includes a current portion of $4,839 and a long-term portion of $9,177 as of June 30, 2022. As of December 31, 2021, notes payable includes a current portion of $4,926 and a long-term portion of $13,769, respectively.

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Long-term Debt

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Long-term Debt

Convertible Notes Payable - Related Party

Yorkville Convertible Note

On June 13, 2022, the Company issued and sold the Promissory Note with a stated principal amount of $7,500 in a private placement to Yorkville (“Yorkville” or the “Holder”) under the Supplemental Agreement. The Promissory Note has a maturity date of September 15, 2022 (the “Maturity Date”). The Promissory Note was issued with a 2% original issue discount and bears interest only upon the occurrence of an Event of Default, as discussed below. The Company shall reimburse the Holder promptly for all fees, costs and expenses, including, without limitation, attorneys’ fees and expenses incurred by the Holder in connection with the Promissory Note if the Company fails to strictly comply with the terms of the Promissory Note. Total cash proceeds of $7,350 were received upon the issuance.

Mandatory Repayments - Six installments of $1,250 shall be made starting from August 11, 2022, ending on the Maturity Date. The Company may repay each installment amount in either cash or by delivering an Advance notice under the SEPA or in a combination of these two. Refer to Note 12 for details regarding the SEPA. An additional 3% payment premium applies to any installment amount paid in cash. If an installment is repaid in shares via delivery of an Advance notice, the payment premium does not apply. The Company accounts for the payment premium as principal.

Conversion Rights - Yorkville has the right, but not the obligation, to convert principal and accrued interest into shares of the Company’s common stock at a conversion price of $2.21 (the “Conversion Price”) any time prior to the Maturity Date, subject to the terms and conditions of the Promissory Note. At any time that there is an outstanding balance owed under the Promissory Note, the Holder may, pursuant to the terms of the Supplemental Agreement, deliver Investor Notices to require the Company to issue and sell shares of common stock under the SEPA at the Conversion Price in order to repay the amounts owed by the Company to the Holder under the Promissory Note. In addition, while there is an outstanding balance owed under the Promissory Note, the Company may use any Advance requested by the Company pursuant to the SEPA to repay the amounts owed by the Company to the Holder under the Promissory Note. Prior to June 28, 2022, the shares issuable upon conversion were subject to the Exchange Cap. Refer to Note 12 for details regarding the Exchange Cap.

Optional Redemption - The Company has the right, but not the obligation, to redeem (“Optional Redemption”) early a portion or all amounts outstanding under the Promissory Note provided that (i) the Company provides the Holder with at least five trading days’ prior written notice (each, a “Redemption Notice”) of its desire to exercise an Optional Redemption, and (ii) the VWAP of the Company’s common stock on each of the ten trading days immediately prior to the Redemption Notice is less than the conversion price.

Redemption upon Event of Default - Upon the occurrence of an Event of Default (as defined in the SEPA), interest will begin to accrue at a rate of 15% per year and Yorkville may elect to accelerate the repayment of each installment.

Embedded Derivatives - The number of shares issuable for conversion of the Promissory Notes is subject to the Exchange Cap limitation under the SEPA, unless shareholder approval is obtained. Therefore, at issuance, shareholder approval is an explicit input that can adjust the number of shares issuable upon settlement. Because shareholder approval is not an input that is indexed to the Company’s shares, the conversion feature is not indexed to the Company's own stock. Therefore, the conversion feature does not qualify for the scope exception to derivative accounting and bifurcation is required at issuance. On June 28, 2022, shareholder approval was obtained to issue shares under the SEPA in excess of the Exchange Cap. As such, upon the receipt of shareholder approval, the conversion feature no longer requires bifurcation and would be classified in equity.

In addition, upon the occurrence of an Event of Default, as defined in the Promissory Note, interest will begin to accrue at a rate of 15% per year and reimbursement of fees, cost and expenses incurred by the Holder in any action in connection with the Promissory Note are required if the Company fails to comply with the Promissory Note. An event of default and the nature of noncompliance includes events that are unrelated to Company’s credit worthiness and/or interest rates. Therefore, these features are not clearly and closely related to the debt host and bifurcation is required for this feature under the requirement of Accounting Standards Codification 815, Derivatives and Hedging (“ASC 815”).

Management concluded the fair value of the bifurcated embedded derivative described above as of the issuance date, June 28, 2022 and June 30, 2022 is de minimis.

Debt Issuance Costs - The Company incurred $125 of legal fees in connection with the issuance of the Promissory Note. No debt issuance costs were allocated to the embedded derivative due to the de minimis fair value and the full amount of the issuance cost were allocated to the Promissory Note. These costs were accounted for as debt issuance costs and recorded as a reduction to the initial carrying value of the Promissory Note.

The following table summarizes interest expense recognized for the three and six months ended June 30, 2022:

	For the Three and Six Months Ended June 30, 2022
Contractual interest expense	$	—
Amortization of debt discount	81
Amortization of debt issuance costs	27
Total	$	108

The Yorkville Convertible Note as of June 30, 2022 are comprised of the following:

	June 30, 2022
Principal-Installment	$	7,500
Principal- Payment Premium	225
Unamortized debt discount	(294)
Unamortized debt issuance costs	(98)
Aggregate carrying value	$	7,333

2021 Convertible Notes

As previously reported, on July 6, 2021, the Company entered into an investment agreement (the “Investment Agreement”) with Spring Creek Capital, LLC, a wholly-owned, indirect subsidiary of Koch Industries providing for the issuance and sale to Koch Industries of convertible notes in the aggregate principal amount of $100,000 (the “2021 Convertible Notes”). The transactions contemplated by the Investment Agreement closed on July 7, 2021 (the “Issue Date”). The maturity date of the 2021 Convertible Notes is June 30, 2026, subject to earlier conversion, redemption, or repurchase.

The Company estimated the fair value of the embedded conversion feature using a binomial lattice model at the inception and on subsequent valuation dates. This model incorporates inputs such as the stock price of the Company, dividend yield, risk-free interest rate, the effective debt yield and expected volatility. The effective debt yield and volatility involve unobservable inputs classified as Level 3 of the fair value hierarchy. Refer to Note 20 for definition of the fair value hierarchy. The assumptions used to determine the fair value of the embedded conversion feature as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022		December 31, 2021
Term	4.0 years		4.5 years
Dividend yield	—	%	—	%
Risk-free interest rate	3.0	%	1.2	%
Volatility	80.0	%	60.0	%
Effective debt yield	25.5	%	19.0	%

As of June 30, 2022 and December 31, 2021, the fair value of the embedded conversion feature was $707 and $12,359, respectively. The Company recognized a gain of $3,978 and $11,673 attributable to the change in fair value of the embedded conversion feature for the three and six months ended June 30, 2022, respectively.

The following table summarizes interest expense recognized:

	For the Three Months Ended June 30, 2022		For the Six Months Ended June 30, 2022
Contractual interest expense	$	1,544	$	3,087
Amortization of debt discount	924		1,467
Amortization of debt issuance costs	90		177
Total	$	2,558	$	4,731

The 2021 Convertible Notes as of June 30, 2022 and December 31, 2021 was comprised of the following:

	June 30, 2022		December 31, 2021
Principal	$	105,987	$	102,900
Unamortized debt discount	(26,876)		(28,321)
Unamortized debt issuance costs	(2,613)		(2,790)
Embedded conversion feature	707		12,359
Aggregate carrying value	$	77,205	$	84,148

The Company elected to repay the contractual interest due on June 30, 2022 in-kind as an increase to the principal amount. $3,087 of contractual interest attributable to the 2021 Convertible Notes was recorded as addition to the convertible notes payable - related party balance on the condensed consolidated balance sheets.

Long-term DebtLong-term debt consists of the outstanding balances from the previously-reported $25,000 equipment financing facility with Trinity Capital Inc. ("Trinity"). As of June 30, 2022, the Company had drawn $7,000 from the equipment financing facility with an effective interest rate of 14.3%. As of June 30, 2022 and December 31, 2021, total long-term debt was $5,581 and $6,371, with $1,765 and $1,644 of the principal recorded as a current liability on the condensed consolidated balance sheets, respectively. For the three and six months ended June 30, 2022, the Company recognized $205 and $424 as interest expense attributable to the equipment financing agreement, respectively. As of June 30, 2022, the unused commitment from the equipment financing facility was $18,000.

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Warrants Liability - Related Party

6 Months Ended

Jun. 30, 2022

Other Liabilities Disclosure [Abstract]

Warrants Liability - Related Party

Warrants Liability - Related Party

The Private Placement Warrants issued to the Sponsor of BMRG in its initial public offering on May 22, 2020 became exercisable on May 22, 2021. The Private Placement Warrants are classified as Level 2 financial instruments in the fair value hierarchy. Refer to Note 20 for definition of the fair value hierarchy. They are valued on the basis of the quoted price of the Public Warrants, adjusted for insignificant difference between the Public Warrants and Private Placement Warrants. 325,000 Private Placement Warrants were outstanding with a fair value of $89 and $926 as of June 30, 2022 and December 31, 2021, respectively.

The change in fair value for the three months ended June 30, 2022 and 2021 amounted to $270 and $585 and for the six months ended June 30, 2022 and 2021 amounted to $837 and $361, respectively. The change has been recognized in Change in fair value, warrants liability - related party in the Company’s condensed consolidated statements of operations.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

Stock-Based Compensation

Stock-based compensation expense included in the condensed consolidated statements of operations was as follows:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Stock options	$	509	$	1,025	$	1,420	$	2,547
Restricted stock units	2,925		2,170		5,957		3,126
Total	$	3,434	$	3,195	$	7,377	$	5,673

The stock compensation expense has been recorded in cost of goods sold, research and development expenses, and selling, general and administrative expenses in the condensed consolidated statements of operations.

The following table summarizes stock option activity for the six months ended June 30, 2022:

	Units	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (years)
Options Outstanding at December 31, 2021	2,023,460	$	9.51	6.3
Granted	2,870,108	$	1.29
Cancelled/Forfeited	(135,808)	$	9.28
Options Outstanding at June 30, 2022	4,757,760	$	4.56	8.1
Options Exercisable at June 30, 2022	1,415,703	$	9.76	5.4

A summary of restricted stock units (RSUs) activity during the six months ended June 30, 2022 is as follows:

	Units	Weighted-Average Grant-Data Fair Value
RSUs Outstanding at December 31, 2021	2,194,756	$	16.36
Granted	1,950,734	$	3.24
Cancelled/Forfeited	(394,850)	$	11.09
Vested	(427,607)	$	17.83
RSUs Outstanding at June 30, 2022	3,323,033	$	9.09

In 2022, the Company reserved an additional 2,537,866 shares for the Amended and Restated 2020 Incentive Plan. As of June 30, 2022 and December 31, 2021, 530,588 and 2,282,906 shares remain for future issuance, respectively. Options vesting can vary from three months to five years and have a term of five to ten years. RSUs generally vest over three to four years. During the six months ended June 30, 2022, the Company granted 75,000 RSUs and 2,000,000 options with performance and service conditions. Stock compensation is recognized on a straight-line basis over the requisite service period of the award, which is generally the award vesting term. For awards with performance conditions, compensation expense is recognized using an accelerated attribution method over the vesting period. The performance conditions primarily relate to achievement of sales and financing targets. As of June 30, 2022, within the total awards outstanding, there were 2,028,818 and 75,000 performance-based stock options and RSUs, respectively, all of which are expected to vest in the next four years.

Unrecognized stock compensation expenses amounted to $26,539 and included $23,051 attributable to RSUs and $3,488 attributable to stock options. The weighted average vesting period for the stock options and RSUs was 0.8 years and 1.9 years as of June 30, 2022, respectively.

The weighted average assumptions used to determine the fair value of options granted in the six months ended June 30, 2022 and 2021 were as follows:

	2022		2021
Volatility	61.29	%	57.31	%
Risk free interest rate	3.18	%	1.09	%
Expected life (years)	4.60		6.13
Dividend yield	0	%	0	%

The RSUs issued were valued at the stock prices of the Company on the date of grant.

The weighted average grant date fair value of all options granted was $0.68 and $9.08 per option for the six months ended June 30, 2022 and 2021.

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Leases

6 Months Ended

Jun. 30, 2022

Leases [Abstract]

Leases

Leases

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), and the related amendments (collectively “ASC 842”). The Company elected the modified retrospective approach, under which results and disclosures for periods before January 1, 2021 were not adjusted for the new standard and the cumulative effect of the change in accounting, is recognized through accumulated deficit at the date of adoption.

Lessee

The Company leases machinery, manufacturing facilities, office space, land, and equipment under both operating and finance leases. Lease assets and lease liabilities as of June 30, 2022 and December 31, 2021 were as follows:

	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Assets
ROU - operating lease assets	Operating lease right-of-use asset, net	$	4,772	$	3,468
Finance lease assets	Property, plant and equipment, net	89		28
Total lease assets		$	4,861	$	3,496
	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Liabilities
Current
Operating lease liability	Operating lease liability, current portion	$	1,013	$	1,084
Finance lease liability	Other current liabilities	13		8
Non-Current
Operating lease liability	Operating lease liability, long-term	4,705		3,224
Finance lease liability	Other liabilities	76		17
Total lease liabilities		$	5,807	$	4,333

Operating lease costs for the three months ended June 30, 2022 and 2021 were $352 and $280, and for the six months ended June 30, 2022 and 2021 were $677 and $473, respectively. As of June 30, 2022, the weighted average remaining term (in years) for the operating lease was 4.31 years and the weighted average discount rate was 10.4%. The weighted average remaining term (in years) for the finance lease was 4.71 years and the weighted average discount rate was 22.7%.

Future maturity of lease liability are as follows:

	Operating Lease		Financing Lease		Total
Remainder of 2022	$	730	$	15	$	745
2023	1,538		31		1,569
2024	1,617		31		1,648
2025	1,701		31		1,732
2026	1,420		25		1,445
Later years	—		12		12
Total minimum lease payments	$	7,006	$	145	$	7,151
Less amounts representing interest	1,288		56		1,344
Present value of minimum lease payments	$	5,718	$	89	$	5,807

Lessor

The Company leases battery energy storage systems to one customer with a 20-year term through sales-type leases. Leases offered by the Company include purchase options during the lease term with a bargain purchase option at the end of the term. At the time of accepting a lease that qualifies as a sales-type lease, the Company records the gross amount of lease payments receivable, estimated residual value of the leased equipment and unearned finance income. The unearned finance income is recognized interest income over the lease term using the interest method.

For the three and six months ended June 30, 2022, the Company recognized revenue of $128 and $1,166 from the sales-type lease, respectively. No revenue was recognized from the sales-type lease for the three and six months ended June 30, 2021. Net sales-type lease receivables of $1,438 and $347, net of unearned finance income are recorded under other assets on the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021, respectively.

Leases

Leases

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), and the related amendments (collectively “ASC 842”). The Company elected the modified retrospective approach, under which results and disclosures for periods before January 1, 2021 were not adjusted for the new standard and the cumulative effect of the change in accounting, is recognized through accumulated deficit at the date of adoption.

Lessee

The Company leases machinery, manufacturing facilities, office space, land, and equipment under both operating and finance leases. Lease assets and lease liabilities as of June 30, 2022 and December 31, 2021 were as follows:

	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Assets
ROU - operating lease assets	Operating lease right-of-use asset, net	$	4,772	$	3,468
Finance lease assets	Property, plant and equipment, net	89		28
Total lease assets		$	4,861	$	3,496
	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Liabilities
Current
Operating lease liability	Operating lease liability, current portion	$	1,013	$	1,084
Finance lease liability	Other current liabilities	13		8
Non-Current
Operating lease liability	Operating lease liability, long-term	4,705		3,224
Finance lease liability	Other liabilities	76		17
Total lease liabilities		$	5,807	$	4,333

Operating lease costs for the three months ended June 30, 2022 and 2021 were $352 and $280, and for the six months ended June 30, 2022 and 2021 were $677 and $473, respectively. As of June 30, 2022, the weighted average remaining term (in years) for the operating lease was 4.31 years and the weighted average discount rate was 10.4%. The weighted average remaining term (in years) for the finance lease was 4.71 years and the weighted average discount rate was 22.7%.

Future maturity of lease liability are as follows:

	Operating Lease		Financing Lease		Total
Remainder of 2022	$	730	$	15	$	745
2023	1,538		31		1,569
2024	1,617		31		1,648
2025	1,701		31		1,732
2026	1,420		25		1,445
Later years	—		12		12
Total minimum lease payments	$	7,006	$	145	$	7,151
Less amounts representing interest	1,288		56		1,344
Present value of minimum lease payments	$	5,718	$	89	$	5,807

Lessor

The Company leases battery energy storage systems to one customer with a 20-year term through sales-type leases. Leases offered by the Company include purchase options during the lease term with a bargain purchase option at the end of the term. At the time of accepting a lease that qualifies as a sales-type lease, the Company records the gross amount of lease payments receivable, estimated residual value of the leased equipment and unearned finance income. The unearned finance income is recognized interest income over the lease term using the interest method.

For the three and six months ended June 30, 2022, the Company recognized revenue of $128 and $1,166 from the sales-type lease, respectively. No revenue was recognized from the sales-type lease for the three and six months ended June 30, 2021. Net sales-type lease receivables of $1,438 and $347, net of unearned finance income are recorded under other assets on the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021, respectively.

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Fair Value Measurement

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurement

Fair Value Measurement

The Company’s financial instruments consist of cash and cash equivalents, restricted cash, Private Placement Warrants, accounts receivable, notes receivable, contract assets, accounts payable, note payable, convertible notes payable — related party, contract liabilities and long-term debt.

Accounting standards establish a hierarchy which prioritizes the inputs to valuation techniques used to measure fair value into three levels. The fair value hierarchy gives the highest priority to quoted market prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.

Accounting standards require financial assets and liabilities to be classified based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and the exercise of this judgment may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels.

The carrying value of cash and cash equivalents, restricted cash, accounts receivable, contract assets, contract liabilities and accounts payable are considered to be representative of their fair value due to the short maturity of these instruments.

The table below summarizes the fair values of certain liabilities that are included within our accompanying condensed consolidated balance sheets, and their designations among the three fair value measurement categories:

	June 30, 2022						December 31, 2021
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Liabilities
Private Placement Warrants	$	—	$	89	$	—	$	—	$	926	$	—
Embedded derivative liability within the 2021 Convertible Notes	$	—	$	—	$	707	$	—	$	—	$	12,359

The following table presents a roll-forward of the activity of the embedded derivative liability within the 2021 Convertible Notes. This liability was measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2022. No liabilities were measured at fair value using Level 3 inputs for the three and six months ended June 30, 2021.

	For the Three Months Ended		For the Six Months Ended
	June 30, 2022		June 30, 2022
Balance at beginning of the period	$	4,664	$	12,359
Additions	21		21
Change in fair value included in earnings	(3,978)		(11,673)
Balance at end of the period	$	707	$	707

The estimated fair value of financial instruments not carried at fair value in the condensed consolidated balance sheets was as follows:

	Level in Fair Value Hierarchy	June 30, 2022				December 31, 2021
		Carrying Value		Fair Value		Carrying Value		Fair Value
Notes receivable	3	$	3,855	$	2,062	$	3,650	$	2,805
Note payable	3	$	14,016	$	9,867	$	18,695	$	14,607
Equipment financing facility	3	$	5,581	$	4,847	$	6,371	$	5,951
Yorkville Convertible Note	3	$	7,333	$	7,444	$	—	$	—
2021 Convertible Notes without embedded derivative liability	3	$	76,498	$	55,082	$	71,789	$	61,866

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Shareholders’ Equity (Deficit)

6 Months Ended

Jun. 30, 2022

Equity [Abstract]

Shareholders’ Equity (Deficit)

Shareholders’ Equity (Deficit)

Preferred Shares

The Company is authorized to issue 1,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s Board of Directors. At June 30, 2022 and December 31, 2021, there were no shares of preferred stock issued or outstanding.

Common Stock

On June 28, 2022, the Company’s shareholders approved an amendment to our Third Amended and Restated Certificate of Incorporation to increase the authorized shares of common stock with $0.0001 par value from 200,000,000 to 300,000,000. The holders of the Company’s common stock are entitled to one vote for each share. At June 30, 2022 and December 31, 2021, there were 58,519,739 and 53,786,632 shares of common stock issued and outstanding. As of June 30, 2022, the Company has generated net proceeds of $5,000 from the issuance of 3,967,939 shares at an average price of $1.26 per common share under the SEPA. In addition, upon the entry into the SEPA, 465,117 shares were issued to Yorkville as consideration for its irrevocable commitment to purchase common stock pursuant to the SEPA. Fair value of these shares of $1,061 was recorded as other expense in the condensed consolidated statements of operations and comprehensive loss.

Contingently Issuable Common Stock

Following the closing of the Merger, and as additional consideration for the transaction, the Company was obligated to issue within five years from the closing date to each unitholder of EES its pro-rata proportion of a one-time issuance of an aggregate of 2,000,000 Shares (the “Earnout Shares” or "Contingently Issuable Common Stock"), within 5 business days after (i) the closing share price of the Company's shares traded equaling or exceeding $16.00 per share for any 20 trading days within any consecutive 30-trading day period during the Earnout Period or (ii) a Change of Control (or a definitive agreement providing for a Change of Control having been entered into) during the Earnout Period (each of clauses (i) and (ii), a “Triggering Event”).

On January 22, 2021, the Triggering Event for the issuance of the Earnout Shares occurred as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period during the Earnout Period. Accordingly, 1,999,185 Earnout Shares were issued to the unitholders of EES.

Sponsor Earnout Shares

Pursuant to the Sponsor Earnout letter signed in connection with the Merger, 1,718,000 shares of common stock issued and outstanding held by BMRG ("Sponsor Earnout Shares") were subject to certain transfer and other restrictions, under which (a) 859,000 Sponsor Earnout Shares ("Block A Sponsor Earnout Shares") are restricted from being transferred unless and until either, for a period of five years after the Closing, (i) the share price of our common stock equals or exceeds $12.00 per share for any 20 trading days within any consecutive 30-trading day period or (ii) a change of control occurs for a share price equaling or exceeding $12.00 per share, and (b) the remaining 859,000 Sponsor Earnout Shares ("Block B Sponsor Earnout Shares") are subject to similar restrictions except that the threshold is increased from $12.00 to $16.00. If after the five year period, there are no Triggering Events, the Sponsor Earnout Shares will be forfeited and canceled for no consideration. If after the five year period, only the Triggering Event described in clause (a) above has occurred, the remaining 859,000 Sponsor Earnout Shares described in clause (b) will be forfeited and canceled for no consideration.

On January 22, 2021, as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period, the Block B Sponsor Earnout Shares were released from restriction.

Treasury Stock

For the three and six months ended June 30, 2022, the Company recorded treasury stock of $26 and $852 for shares withheld from employees to cover the payroll tax liability of RSUs vested. The treasury stock was immediately retired. No treasury stock was recorded for the three and six months ended June 30, 2021.

Warrants

The Company sold warrants to purchase 9,075,000 shares of the Company's common stock in the public offering and the private placement on May 22, 2020. Each warrant entitles the holder to purchase a share of common stock at a price of $11.50 per share. For the three months ended June 30, 2022 and 2021, — and 1,465,414 of Public Warrants were exercised, respectively, and for the six months ended June 30, 2022 and 2021, 600 and 1,465,414 of Public Warrants were exercised, respectively. At June 30, 2022 and December 31, 2021, there were 7,001,654 and 7,002,254 Public Warrants outstanding.

Earnings (loss) Per Share

Basic earnings per share (“EPS”) is computed by dividing earnings available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Other potentially dilutive common shares, and the related impact to earnings, are considered when calculating EPS on a diluted basis. As we incurred a net loss for the three and six months ended June 30, 2022 and 2021, the potential dilutive shares from stock options, restricted stock units, warrants, and convertible redeemable notes were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented. Therefore, basic and diluted EPS are computed using the same number of weighted average shares for the three and six months ended June 30, 2022 and 2021. The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	For the Three and Six Months Ended June 30,
	2022	2021
Stock options and restricted stock units	8,080,793	4,154,478
Warrants	7,326,654	7,609,586
Convertible Notes (if converted)	8,692,061	—

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Subsequent Events

6 Months Ended

Jun. 30, 2022

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Senior Secured Term Loan Credit Agreement

On July 29, 2022 (the “Closing Date”), the Company entered into a Senior Secured Term Loan Credit Agreement (the “Credit Agreement”) with ACP Post Oak Credit I LLC, as lender, administrative agent and collateral agent, and the lenders from time to time party thereto (collectively, “Atlas” or the “Lender”). The Credit Agreement provides for an $85,106 term loan (the “Term Loan”), the entirety of which was funded on the Closing Date. The Credit Agreement also permits the Company to make an one-time request for an additional commitment of up to $14,894, with funding of such commitment in the sole discretion of the Lenders, under certain circumstances and under the same terms as set forth in the Credit Agreement. On the Closing Date, the Company also entered into a Guarantee and Collateral Agreement, dated as of July 29, 2022, by and among the Company, the other grantors named therein and Atlas (the “Guarantee and Collateral Agreement”).

The Term Loan is set to mature on the earlier of (i) July 29, 2026 and (ii) 91 days prior to the then-current maturity date of the 2021 Convertible Notes, which matures on June 30, 2026, after giving effect to any extension, refinancing or replacement thereof (the “Maturity Date”).

The outstanding principal balance of the Term Loan bears interest at the applicable margin plus, at the Company’s election, either (i) the benchmark secured overnight financing rate (“SOFR”), which is a per annum rate equal to the greater of (y) the Term SOFR (as defined in the Credit Agreement) plus 0.2616% and (z) 1.0%, or (ii) the alternate base rate (“ABR”), which is a per annum rate equal to the greatest of (x) the Prime Rate (as defined in the Credit Agreement), (y) the NYFRB Rate (as defined in the Credit Agreement) plus 0.5% and (z) the SOFR. The applicable margin under the Credit Agreement is 8.50% per annum with respect to SOFR loans, and 7.50% per annum with respect to ABR loans.

The Term Loan is secured by substantially all of the assets of the Company and its subsidiaries other than the assets of Hi-Power and is guaranteed by the Company’s subsidiaries other than Hi-Power. The Credit Agreement also contains customary affirmative and negative covenants. In particular, the Credit Agreement requires the Company to have liquidity of at least $9,621 as of the last day of each fiscal quarter, subject to certain adjustments set forth in the Credit Agreement. In addition, the Credit Agreement limits the Company’s and its subsidiaries’ ability to incur indebtedness, make restricted payments, including cash dividends on its common stock, make certain investments, loans and advances, enter into mergers and acquisitions, sell, assign, transfer or otherwise dispose of its assets, enter into transactions with its affiliates and engage in sale and leaseback transactions, among other restrictions. Furthermore, the limitation on the Company’s ability to incur indebtedness also (i) limits the amount of Pre-Advance Loans that the Company may have outstanding at any time to $15,000 under the SEPA and (ii) requires the payment of principal and interest in kind on each of the Pre-Advance Loans (if any) and the 2021 Convertible Notes.

Repayment of Yorkville Convertible Note

In July 2022, pursuant to the terms of the Supplemental Agreement, Yorkville delivered six Investor Notices under the SEPA requiring the Company to issue and sell an aggregate of 3,393,663 shares of common stock at a price of $2.21 per share. The total purchase price of the shares of common stock was $7,500. The proceeds from the issuance of the shares were used to repay all outstanding amounts owed to Yorkville pursuant to the Promissory Note. The shares were issued on July 22, 2022 and August 1, 2022.

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Nature of Operations and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements include the accounts of the Company and its 100% owned, direct and indirect subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). All intercompany transactions and balances have been eliminated in the preparation of the condensed consolidated financial statements. These statements reflect all adjustments, consisting of normal recurring adjustments, which, in the opinion of management, are necessary for fair presentation of the information contained therein. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. These interim results are not necessarily indicative of results for the full year.

Reclassification of Prior Year Presentation

Reclassification of Prior Year PresentationCertain prior year amounts have been reclassified for consistency with the current year presentation. These reclassifications had no effect on the reported results of operations.

Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements

On January 1, 2021, the Company adopted ASU 2016-02, Leases (“Topic 842”), using the transition method introduced by ASU 2018-11, which does not require revisions to comparative periods. The adoption of the new standard resulted in the recording of lease assets and lease liabilities of $3,662 and $4,465, respectively, as of January 1, 2021. The difference between the lease assets and lease liabilities primarily relates to deferred rent recorded in accordance with the previous leasing guidance. The new standard did not materially impact our condensed consolidated statements of operations or statements of cash flows.

On January 1, 2021, the Company adopted ASU No. 2016-13, Financial Instruments-Credit Losses (“Topic 326”), and the subsequent amendments. The standard sets forth an expected credit loss model which requires the measurement of expected credit losses for financial instruments based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost, and certain off-balance sheet credit exposures. The adoption of this standard did not have a material impact on our condensed consolidated financial statements.

Recent Accounting Pronouncements

As of June 30, 2022, the Company implemented all applicable new accounting standards and updates issued by the Financial Accounting Standards Board (“FASB”) that were in effect. There were no new standards or updates adopted during the six months ended June 30, 2022 that had a material impact on our condensed consolidated financial statements.

Foreign Currency Translation

Foreign Currency TranslationWe follow the provisions of ASC 830, Foreign Currency Matters. Our foreign subsidiaries use the local currency of their respective countries as their functional currency. The assets and liabilities of foreign operations are translated at the exchange rates in effect at the balance sheet date. The operating results of foreign operations are translated at weighted average exchange rates. The related translation gains or losses are reported as a separate component of shareholders’ equity (deficit) in accumulated other comprehensive loss. Gains and losses from foreign currency transactions, which were insignificant for the three and six months ended June 30, 2022 and 2021, are included as other income (expense) in the condensed consolidated statements of operations and comprehensive loss.

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Acquisition (Tables)

6 Months Ended

Jun. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the final allocation of the purchase price to the fair values of the assets acquired and liabilities assumed as of the Acquisition Date.

	Amount
Inventory	$	2,666
Vendor deposits	818
Property, plant and equipment, net	74
Goodwill	4,331
Accounts payable and accrued expenses	(3,634)
Provision for firm purchase commitments	(3,890)
Net assets acquired, net of cash and cash equivalents of $53 1	$	365

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Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Product revenues, which are recognized at a point in time, and service revenues, which are recognized over time, are as follows:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Product revenue	$	5,771	$	599	$	9,065	$	763
Service revenue	124		13		128		13
Total	$	5,895	$	612	$	9,193	$	776

Information about Contract Liabilities from Contracts with Customers

The following table provides information about contract assets and contract liabilities from contracts with customers. Contract assets are included in other current assets and contract liabilities are included separately on the condensed consolidated balance sheets.

	June 30, 2022		December 31, 2021
Contract assets	$	938	$	1,369
Contract liabilities	$	1,755	$	849

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Inventory (Tables)

6 Months Ended

Jun. 30, 2022

Inventory Disclosure [Abstract]

Components of Inventories

The following table provides information about inventory balances:

	June 30, 2022		December 31, 2021
Raw materials	$	12,429	$	11,898
Work-in-process	167		43
Finished goods	345		1,035
Total Inventory, net	$	12,941	$	12,976

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Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Components of Property and Equipment

As of June 30, 2022 and December 31, 2021, property, plant and equipment, net consisted of the following:

	2022		2021		Useful lives
Equipment	$	20,071	$	13,489	3	—	10 years
Finance lease	296		226		5 years
Furniture	1,396		808		5	—	10 years
Leasehold Improvements	4,114		2,933		Lesser of useful life/remaining lease
Tooling	3,385		3,053		2	—	3 years
Total	29,262		20,509
Less: Accumulated Depreciation	(8,270)		(7,619)
Total Property, Plant and Equipment, net	$	20,992	$	12,890

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Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Estimated Future Amortization Expense of Intangible Assets

Estimated future amortization expense of intangible assets as of June 30, 2022 are as follows:

Remainder of 2022	$	20
2023	40
2024	40
2025	40
2026	40
Thereafter	80
Total	$	260

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Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2022

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

As of June 30, 2022 and December 31, 2021, accrued expenses consisted of the following:

	June 30, 2022		December 31, 2021
Accrued payroll	$	4,602	$	3,069
Warranty reserve	3,636		2,112
Accrued legal and professional expenses	3,595		826
Provision for contract losses	1,249		—
Other	1,607		1,667
Total	$	14,689	$	7,674

Schedule of Product Warranty Liability

The following table summarizes warranty reserve activity:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Warranty reserve - beginning of period	$	3,240	$	66	$	2,112	$	—
Additions for current period deliveries	828		774		1,501		840
Changes in the estimate of warranty reserve	366		32		1,321		32
Warranty costs incurred	(798)		—		(1,298)		—
Warranty reserve - end of period	$	3,636	$	872	$	3,636	$	872

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Convertible Notes Payable - Related Party (Tables)

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Interest Income and Interest Expense Disclosure

The following table summarizes interest expense recognized for the three and six months ended June 30, 2022:

	For the Three and Six Months Ended June 30, 2022
Contractual interest expense	$	—
Amortization of debt discount	81
Amortization of debt issuance costs	27
Total	$	108

The following table summarizes interest expense recognized:

	For the Three Months Ended June 30, 2022		For the Six Months Ended June 30, 2022
Contractual interest expense	$	1,544	$	3,087
Amortization of debt discount	924		1,467
Amortization of debt issuance costs	90		177
Total	$	2,558	$	4,731

Summary of Balances Recognized upon Issuance of Convertible Notes

The Yorkville Convertible Note as of June 30, 2022 are comprised of the following:

	June 30, 2022
Principal-Installment	$	7,500
Principal- Payment Premium	225
Unamortized debt discount	(294)
Unamortized debt issuance costs	(98)
Aggregate carrying value	$	7,333

The 2021 Convertible Notes as of June 30, 2022 and December 31, 2021 was comprised of the following:

	June 30, 2022		December 31, 2021
Principal	$	105,987	$	102,900
Unamortized debt discount	(26,876)		(28,321)
Unamortized debt issuance costs	(2,613)		(2,790)
Embedded conversion feature	707		12,359
Aggregate carrying value	$	77,205	$	84,148

Debt Instrument, Fair Value Assumptions

The assumptions used to determine the fair value of the embedded conversion feature as of June 30, 2022 and December 31, 2021 are as follows:

	June 30, 2022		December 31, 2021
Term	4.0 years		4.5 years
Dividend yield	—	%	—	%
Risk-free interest rate	3.0	%	1.2	%
Volatility	80.0	%	60.0	%
Effective debt yield	25.5	%	19.0	%

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Cost by Plan

Stock-based compensation expense included in the condensed consolidated statements of operations was as follows:

	For the Three Months Ended				For the Six Months Ended
	June 30, 2022		June 30, 2021		June 30, 2022		June 30, 2021
Stock options	$	509	$	1,025	$	1,420	$	2,547
Restricted stock units	2,925		2,170		5,957		3,126
Total	$	3,434	$	3,195	$	7,377	$	5,673

Summary of Outstanding Stock Option Activity

The following table summarizes stock option activity for the six months ended June 30, 2022:

	Units	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (years)
Options Outstanding at December 31, 2021	2,023,460	$	9.51	6.3
Granted	2,870,108	$	1.29
Cancelled/Forfeited	(135,808)	$	9.28
Options Outstanding at June 30, 2022	4,757,760	$	4.56	8.1
Options Exercisable at June 30, 2022	1,415,703	$	9.76	5.4

Share-based Payment Arrangement, Restricted Stock Unit, Activity

A summary of restricted stock units (RSUs) activity during the six months ended June 30, 2022 is as follows:

	Units	Weighted-Average Grant-Data Fair Value
RSUs Outstanding at December 31, 2021	2,194,756	$	16.36
Granted	1,950,734	$	3.24
Cancelled/Forfeited	(394,850)	$	11.09
Vested	(427,607)	$	17.83
RSUs Outstanding at June 30, 2022	3,323,033	$	9.09

Weighted-Average Assumptions Used to Determine the Fair Value of Options Granted

The weighted average assumptions used to determine the fair value of options granted in the six months ended June 30, 2022 and 2021 were as follows:

	2022		2021
Volatility	61.29	%	57.31	%
Risk free interest rate	3.18	%	1.09	%
Expected life (years)	4.60		6.13
Dividend yield	0	%	0	%

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Leases (Tables)

6 Months Ended

Jun. 30, 2022

Leases [Abstract]

Assets And Liabilities, Lessee

Lease assets and lease liabilities as of June 30, 2022 and December 31, 2021 were as follows:

	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Assets
ROU - operating lease assets	Operating lease right-of-use asset, net	$	4,772	$	3,468
Finance lease assets	Property, plant and equipment, net	89		28
Total lease assets		$	4,861	$	3,496
	Classification on Balance Sheet	June 30, 2022		December 31, 2021
Liabilities
Current
Operating lease liability	Operating lease liability, current portion	$	1,013	$	1,084
Finance lease liability	Other current liabilities	13		8
Non-Current
Operating lease liability	Operating lease liability, long-term	4,705		3,224
Finance lease liability	Other liabilities	76		17
Total lease liabilities		$	5,807	$	4,333

Lessee, Operating Lease, Liability, Maturity

Future maturity of lease liability are as follows:

	Operating Lease		Financing Lease		Total
Remainder of 2022	$	730	$	15	$	745
2023	1,538		31		1,569
2024	1,617		31		1,648
2025	1,701		31		1,732
2026	1,420		25		1,445
Later years	—		12		12
Total minimum lease payments	$	7,006	$	145	$	7,151
Less amounts representing interest	1,288		56		1,344
Present value of minimum lease payments	$	5,718	$	89	$	5,807

Finance Lease, Liability, Fiscal Year Maturity

Future maturity of lease liability are as follows:

	Operating Lease		Financing Lease		Total
Remainder of 2022	$	730	$	15	$	745
2023	1,538		31		1,569
2024	1,617		31		1,648
2025	1,701		31		1,732
2026	1,420		25		1,445
Later years	—		12		12
Total minimum lease payments	$	7,006	$	145	$	7,151
Less amounts representing interest	1,288		56		1,344
Present value of minimum lease payments	$	5,718	$	89	$	5,807

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Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2022

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The table below summarizes the fair values of certain liabilities that are included within our accompanying condensed consolidated balance sheets, and their designations among the three fair value measurement categories:

	June 30, 2022						December 31, 2021
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Liabilities
Private Placement Warrants	$	—	$	89	$	—	$	—	$	926	$	—
Embedded derivative liability within the 2021 Convertible Notes	$	—	$	—	$	707	$	—	$	—	$	12,359

Liabilities measured at fair value on recurring basis using significant unobservable inputs (Level 3)

The following table presents a roll-forward of the activity of the embedded derivative liability within the 2021 Convertible Notes. This liability was measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2022. No liabilities were measured at fair value using Level 3 inputs for the three and six months ended June 30, 2021.

	For the Three Months Ended		For the Six Months Ended
	June 30, 2022		June 30, 2022
Balance at beginning of the period	$	4,664	$	12,359
Additions	21		21
Change in fair value included in earnings	(3,978)		(11,673)
Balance at end of the period	$	707	$	707

Fair Value, Liabilities Measured on Recurring Basis

The estimated fair value of financial instruments not carried at fair value in the condensed consolidated balance sheets was as follows:

	Level in Fair Value Hierarchy	June 30, 2022				December 31, 2021
		Carrying Value		Fair Value		Carrying Value		Fair Value
Notes receivable	3	$	3,855	$	2,062	$	3,650	$	2,805
Note payable	3	$	14,016	$	9,867	$	18,695	$	14,607
Equipment financing facility	3	$	5,581	$	4,847	$	6,371	$	5,951
Yorkville Convertible Note	3	$	7,333	$	7,444	$	—	$	—
2021 Convertible Notes without embedded derivative liability	3	$	76,498	$	55,082	$	71,789	$	61,866

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Shareholders’ Equity (Deficit) (Tables)

6 Months Ended

Jun. 30, 2022

Equity [Abstract]

Antidilutive Shares Excluded from Calculation of Earnings Per Share

The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:

	For the Three and Six Months Ended June 30,
	2022	2021
Stock options and restricted stock units	8,080,793	4,154,478
Warrants	7,326,654	7,609,586
Convertible Notes (if converted)	8,692,061	—

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Nature of Operations and Summary of Significant Accounting Policies (Details) - USD ($)	Jul. 31, 2022	Jun. 30, 2022	Apr. 28, 2022	Dec. 31, 2021	Jun. 30, 2021	Jan. 01, 2021
Product Warranty Liability [Line Items]
Assets		$ 97,740,000		$ 169,175,000
Cash and cash equivalents		16,273,000		104,831,000	$ 74,690,000
Liabilities		155,569,000		136,728,000
Convertible notes payable		84,538,000
Notes payable		14,016,000
Other long-term debt		5,581,000
Accumulated deficit		(519,005,000)		(416,527,000)
Operating lease right-of-use asset, net		4,772,000		$ 3,468,000		$ 3,662,000
Present value of minimum lease payments		$ 5,718,000				$ 4,465,000
Atlas Senior Term Loan Facility | Subsequent event
Product Warranty Liability [Line Items]
Maximum borrowing capacity	$ 85,106,000
Standby Equity Purchase Agreement
Product Warranty Liability [Line Items]
Common stock standby equity purchase agreement			$ 200,000,000

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Acquisition - Narrative (Details) - USD ($) $ in Thousands					3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	Apr. 09, 2021	Apr. 08, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Aug. 31, 2019
Business Acquisition [Line Items]
Business acquisition, net of cash acquired							$ 0	$ 160
Loss on pre-existing agreement					$ 0	$ 22,516	0	$ 30,368
Long-term debt, current portion					1,765		1,765		$ 1,644
Long-term debt, excluding current portion					$ 3,816		$ 3,816		$ 4,727
Hi-Power
Business Acquisition [Line Items]
Initial ownership interest			100.00%	49.00%	49.00%		49.00%			49.00%
Notes Payable | Hi-Power Purchase Agreement
Business Acquisition [Line Items]
Long-term debt, current portion					$ 4,839		$ 4,839
Long-term debt, excluding current portion					$ 9,177		$ 9,177
Hi-Power
Business Acquisition [Line Items]
Percentage of voting interests acquired			51.00%	51.00%	51.00%		51.00%
Aggregate purchase price			$ 25,000
Consideration transferred, liabilities incurred	$ 5,000	$ 5,000
Payment to terminate agreement			724
Consideration transferred				$ 418
Fair value of previously held ownership interest				205
Loss on remeasurement				$ 7,480
Hi-Power | Holtec Power, Inc.
Business Acquisition [Line Items]
Aggregate purchase price			35,283
Business acquisition, net of cash acquired			10,283
Fair value			33,474
Payment to terminate agreement			$ 32,750

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Acquisition - Related Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Apr. 09, 2021
Business Acquisition [Line Items]
Goodwill	$ 4,331	$ 4,331
Hi-Power
Business Acquisition [Line Items]
Inventory			$ 2,666
Vendor deposits			818
Property, plant and equipment, net			74
Goodwill			4,331
Accounts payable and accrued expenses			(3,634)
Provision for firm purchase commitments			(3,890)
Net assets acquired, net of cash and cash equivalents of $53			365
Cash and cash equivalents			$ 53

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Revenue Recognition - Revenue Recognition Table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 5,895	$ 612	$ 9,193	$ 776
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Total revenue	5,771	599	9,065	763
Transferred over Time
Disaggregation of Revenue [Line Items]
Total revenue	$ 124	$ 13	$ 128	$ 13

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Revenue Recognition - Narratives (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Loss on contracts	$ 1,249,000	$ 0	$ 1,249,000	$ 0
Increase (decrease) in contract asset			(431,000)
Increase (decrease) in contract liabilities			906,000	$ 1,263,000
Contract liabilities, due to billings			1,159,000
Revenue recognized in contract liabilities			253,000
Contract liabilities, current portion	879,000		879,000		$ 849,000
Contract liabilities, long-term	$ 876,000		$ 876,000		$ 0
Revenue Benchmark | Customer 1 | Customer Concentration Risk
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Concentration risk percentage	89.60%	100.00%	73.10%	78.80%
Revenue Benchmark | Customer 2 | Customer Concentration Risk
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Concentration risk percentage			12.70%	21.20%

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Revenue Recognition - Information about Contract Liabilities from Contracts with Customers (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract assets	$ 938	$ 1,369
Contract liabilities	$ 1,755	$ 849

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Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 12,429	$ 11,898
Work-in-process	167	43
Finished goods	345	1,035
Total Inventory, net	$ 12,941	$ 12,976

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Property, Plant and Equipment, Net - Components of Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 29,262	$ 20,509
Less: Accumulated Depreciation	(8,270)	(7,619)
Property and equipment, net	20,992	12,890
Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 20,071	13,489
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful lives	10 years
Finance lease
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 296	226
Useful lives	5 years
Furniture
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 1,396	808
Furniture | Minimum
Property, Plant and Equipment [Line Items]
Useful lives	5 years
Furniture | Maximum
Property, Plant and Equipment [Line Items]
Useful lives	10 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 4,114	2,933
Tooling
Property, Plant and Equipment [Line Items]
Property, plant, and equipment and finance lease right-of-use asset	$ 3,385	$ 3,053
Tooling | Minimum
Property, Plant and Equipment [Line Items]
Useful lives	2 years
Tooling | Maximum
Property, Plant and Equipment [Line Items]
Useful lives	3 years

XML

Property, Plant and Equipment, Net - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Depreciation expense related to property and equipment	$ 1,261	$ 602	$ 2,246	$ 1,077
Write down of property, plant and equipment	$ 1,997	$ 0	$ 2,005	$ 11

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Intangible Assets - Narratives (Details) - Patents - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Gross patents value	$ 400		$ 400
Patents useful lives			10 years
Patents amortization expenses	$ 10	$ 10	$ 20	$ 20

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Intangible Assets - Estimated Future Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 20
2023	40
2024	40
2025	40
2026	40
Thereafter	80
Total	$ 260	$ 280

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Investment in Unconsolidated Joint Venture (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 09, 2021	Apr. 08, 2021	Aug. 31, 2019
Schedule of Equity Method Investments [Line Items]
Contribution made to the JV		$ 0		$ 4,000
Investment income (loss) from unconsolidated joint venture under the equity method of accounting	$ 0	$ 0	$ 0	$ 440
Hi-Power
Schedule of Equity Method Investments [Line Items]
Percentage of voting interests acquired	51.00%		51.00%		51.00%	51.00%
Hi-Power
Schedule of Equity Method Investments [Line Items]
Initial estimated financial commitment							$ 4,100
Initial ownership interest	49.00%		49.00%		100.00%	49.00%	49.00%

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Notes Receivable, Net and Variable Interest Entities (“VIEs”) Consideration (Details) - Variable Interest Entity, not primary beneficiary - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Loan commitment on the consolidated balance sheet	$ 3,855	$ 3,650
Financing receivable, allowance for credit loss	$ 7	$ 6

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Commitments and Contingencies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
U.S. Department of Justice
Other Commitments [Line Items]
Settlement, amount awarded to other party	$ 1,017
Relator
Other Commitments [Line Items]
Settlement, amount awarded to other party	70
Firm Commitment
Other Commitments [Line Items]
Non-cancellable purchase commitment	173
Minimum Volume Commitment
Other Commitments [Line Items]
Non-cancellable purchase commitment	$ 232

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Grant Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Other Income and Expenses [Abstract]
Grant (income) expense, net	$ (169)	$ (52)	$ 4	$ (44)
Grant payments received	0	$ 0	0	$ 0
Grants receivable, current	1,250		1,250		$ 1,020
Deferred grant income, current	$ 183		$ 183		$ 0

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Income Taxes - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Tax provision (benefit)	$ (23)	$ 0	$ (65)	$ 0

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Related Party Transactions (Details) - USD ($)					3 Months Ended		6 Months Ended
	Apr. 28, 2022	Dec. 29, 2021	Dec. 01, 2021	Jul. 06, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 13, 2022	Dec. 31, 2021	Dec. 28, 2021	Jul. 31, 2021	Apr. 08, 2021
Related Party Transaction [Line Items]
Selling, general and administrative expenses					$ 19,115,000	$ 11,325,000	$ 33,394,000	$ 20,127,000
Standby Equity Purchase Agreement
Related Party Transaction [Line Items]
Common stock standby equity purchase agreement	$ 200,000,000
Each sale aggregate value	$ 20,000,000
Share price as percentage of market price	97.00%
Sale of stock, percentage of ownership after transaction	9.99%
Sale of stock ownership threshold after exchange cap percent	19.99%
Maximum borrowing capacity under agreement	$ 50,000,000
Equity interests issued or issuable number of shares issued (in shares)	465,117
Derivative instruments in hedges, assets, at fair value	$ 0				0		0
Cash received on issuance of shares							$ 5,000,000
Sale of stock, number of shares issued in transaction (in shares)							3,967,939
Standby Equity Purchase Agreement | Yorkville
Related Party Transaction [Line Items]
Sale of stock, number of shares issued in transaction (in shares)							4,433,056
Ownership interest							8.00%
2021 Convertible Notes without embedded derivative liability
Related Party Transaction [Line Items]
Interest expense					2,558,000		$ 4,731,000
Gain (loss) on beneficial conversion feature					3,978,000		11,673,000
Principal-Installment				$ 100,000,000
Yorkville Convertible Note
Related Party Transaction [Line Items]
Payment made for debt issuance cost							125,000
Interest expense					108,000		108,000
Principal-Installment					7,500,000		7,500,000		$ 7,500,000
Interest expense					$ 108,000		$ 108,000
Hellman Parties | Dilutive Effect Prior to Merger Agreement
Related Party Transaction [Line Items]
Equity interest issued or issuable (in shares)		159,977	300,000
Spring Creek Capital, LLC
Related Party Transaction [Line Items]
Notes receivable, related parties												$ 100,000,000
B. Riley Securities, Inc
Related Party Transaction [Line Items]
Payment made for debt issuance cost				$ 3,000,000
Equity Method Investee | Holtec International
Related Party Transaction [Line Items]
Selling, general and administrative expenses						22,516,000		30,368,000
Affiliated Entity | B. Riley Securities, Inc
Related Party Transaction [Line Items]
Due from related parties, current						$ 432,000		$ 432,000
Hellman Parties | Dilutive Effect Prior to Merger Agreement
Related Party Transaction [Line Items]
Estimated litigation liability													$ 5,000,000
Settlement deductible													$ 2,000,000
Loss contingency accrual										$ 1,200,000	$ 1,200,000
Loss contingency accrual, payments		$ 1,200,000
Loss contingency accrual, share equivalent (in shares)											140,023

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Accrued Expenses - Schedule of Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued payroll	$ 4,602	$ 3,069
Warranty reserve	3,636	2,112
Accrued legal and professional expenses	3,595	826
Provision for contract losses	1,249	0
Other	1,607	1,667
Total	$ 14,689	$ 7,674

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Accrued Expenses - Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty reserve - beginning of period	$ 3,240	$ 66	$ 2,112	$ 0
Additions for current period deliveries	828	774	1,501	840
Changes in the estimate of warranty reserve	366	32	1,321	32
Warranty costs incurred	(798)	0	(1,298)	0
Warranty reserve - end of period	$ 3,636	$ 872	$ 3,636	$ 872

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Convertible Notes Payable - Related Party - Narrative (Details)		3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 13, 2022 USD ($)	Jun. 30, 2022 USD ($) $ / shares	Jun. 30, 2022 USD ($) tradingDay installment $ / shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Jul. 06, 2021 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes			$ 7,225,000	$ 0
Issuance of convertible notes for interest paid in kind			3,087,000	$ 0
Yorkville Convertible Note
Debt Instrument [Line Items]
Principal-Installment	$ 7,500,000	$ 7,500,000	$ 7,500,000
Discount rate percentage	2.00%
Proceeds from issuance of convertible notes	$ 7,350,000
Debt instrument, number of installments | installment			6
Note periodic payment			$ 1,250,000
Payment premium rate		3.00%	3.00%
Conversion price per unit (in dollars per share) | $ / shares		$ 2.21	$ 2.21
Threshold trading days | tradingDay			5
Interest rate upon default		15.00%	15.00%
Payment made for debt issuance cost			$ 125,000
Interest expense		$ 108,000	108,000
2021 Convertible Notes without embedded derivative liability
Debt Instrument [Line Items]
Principal-Installment						$ 100,000,000
Embedded conversion feature			707,000		$ 12,359,000
Gain (loss) on beneficial conversion feature		3,978,000	11,673,000
Interest expense		2,558,000	4,731,000
Issuance of convertible notes for interest paid in kind			3,087,000
Senior Notes | 2021 Convertible Notes without embedded derivative liability
Debt Instrument [Line Items]
Principal-Installment		$ 105,987,000	$ 105,987,000		$ 102,900,000

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Convertible Notes Payable - Related Party - Debt Assumptions (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Annual effective interest rates in excess	14.30%
2021 Convertible Notes without embedded derivative liability
Debt Instrument [Line Items]
Debt instrument, term	4 years	4 years 6 months
Annual effective interest rates in excess	25.50%	19.00%
2021 Convertible Notes without embedded derivative liability | Dividend yield
Debt Instrument [Line Items]
Debt Instrument, measurement input	0	0
2021 Convertible Notes without embedded derivative liability | Risk-free interest rate
Debt Instrument [Line Items]
Debt Instrument, measurement input	0.030	0.012
2021 Convertible Notes without embedded derivative liability | Volatility
Debt Instrument [Line Items]
Debt Instrument, measurement input	0.800	0.600

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Convertible Notes Payable - Related Party - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Amortization of debt discount		$ 1,548	$ 0
Amortization of debt issuance costs		204	$ 0
Yorkville Convertible Note
Debt Instrument [Line Items]
Contractual interest expense	$ 0	0
Amortization of debt discount	81	81
Amortization of debt issuance costs	27	27
Total	108	108
2021 Convertible Notes without embedded derivative liability
Debt Instrument [Line Items]
Contractual interest expense	1,544	3,087
Amortization of debt discount	924	1,467
Amortization of debt issuance costs	90	177
Total	$ 2,558	$ 4,731

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Convertible Notes Payable - Related Party - Net Carrying Value (Details) - USD ($)	Jun. 30, 2022	Jun. 13, 2022	Dec. 31, 2021	Jul. 06, 2021
Senior Notes
Debt Instrument [Line Items]
Aggregate carrying value	$ 5,581,000		$ 6,371,000
Yorkville Convertible Note
Debt Instrument [Line Items]
Principal-Installment	7,500,000	$ 7,500,000
Principal- Payment Premium	225,000
Unamortized debt discount	(294,000)
Unamortized debt issuance costs	(98,000)
Aggregate carrying value	7,333,000
2021 Convertible Notes without embedded derivative liability
Debt Instrument [Line Items]
Principal-Installment				$ 100,000,000
2021 Convertible Notes without embedded derivative liability | Senior Notes
Debt Instrument [Line Items]
Principal-Installment	105,987,000		102,900,000
Unamortized debt discount	(26,876,000)		(28,321,000)
Unamortized debt issuance costs	(2,613,000)		(2,790,000)
Embedded conversion feature	707,000		12,359,000
Aggregate carrying value	$ 77,205,000		$ 84,148,000

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Note Payable (Details) - USD ($) $ in Thousands	May 01, 2021	Apr. 09, 2021	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, current portion			$ 1,765	$ 1,644
Long-term debt, excluding current portion			3,816	$ 4,727
Hi-Power Purchase Agreement | Note payable
Debt Instrument [Line Items]
Long-term debt, current portion			4,839
Long-term debt, excluding current portion			$ 9,177
Hi-Power
Debt Instrument [Line Items]
Aggregate purchase price		$ 25,000
Business acquisition, net of cash acquired	$ 5,000

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Long-term Debt - Narratives (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Annual effective interest rates in excess	14.30%	14.30%
Long-term debt, current portion	$ 1,765,000	$ 1,765,000	$ 1,644,000
Senior Notes
Debt Instrument [Line Items]
Long-term debt	5,581,000	5,581,000	$ 6,371,000
Equipment financing facility
Debt Instrument [Line Items]
Maximum borrowing capacity	25,000,000	25,000,000
Long-term line of credit	7,000	7,000
Interest expense	205,000	424,000
Remaining borrowing capacity	$ 18,000,000	$ 18,000,000

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Warrants Liability - Related Party (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	7,001,654		7,001,654		7,002,254
Warrants liability - related party	$ 89		$ 89		$ 926
Change in fair value, warrants liability - related party	$ 270	$ 585	$ 837	$ 361
Private Placement
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)	325,000		325,000		325,000

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Stock-Based Compensation - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized for issuance (in shares)	2,537,866
Number of shares remain for future issuance (in shares)	530,588		2,282,906
Grants in period (in shares)	2,870,108
Unrecognized stock compensation expense	$ 26,539
Unrecognized stock compensation expense attributable to RUs	$ 3,488
Weighted average grant date fair value of options granted (in dollars per share)	$ 0.68	$ 9.08
Share-Based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	4 years
Options, vested and expected to vest, outstanding, number (in shares)	2,028,818
Share-Based Payment Arrangement, Option | Performance and Service Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	2,000,000
Share-Based Payment Arrangement, Option | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	3 months
Options term	5 years
Share-Based Payment Arrangement, Option | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	5 years
Options term	10 years
Share-Based Payment Arrangement, Option | Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	9 months 18 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,950,734
Awards outstanding (in shares)	75,000
Unrecognized stock compensation expense attributable to stock option	$ 23,051
Restricted Stock Units (RSUs) | Performance and Service Conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	75,000
Restricted Stock Units (RSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	3 years
Restricted Stock Units (RSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	4 years
Restricted Stock Units (RSUs) | Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting term	1 year 10 months 24 days

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Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 3,434	$ 3,195	$ 7,377	$ 5,673
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	509	1,025	1,420	2,547
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 2,925	$ 2,170	$ 5,957	$ 3,126

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Stock-Based Compensation - Summary of Stock Option Activity (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Units
Beginning outstanding balance (in shares)	2,023,460
Grants in period (in shares)	2,870,108
Cancelled/Forfeited (in shares)	(135,808)
Ending outstanding balance (in shares)	4,757,760	2,023,460
Exercisable (in shares)	1,415,703
Weighted-Average Grant-Data Fair Value
Beginning outstanding balance (in dollars per share)	$ 9.51
Granted (in dollars per share)	1.29
Cancelled/Forfeited (in dollars per share)	9.28
Ending outstanding balance (in dollars per share)	4.56	$ 9.51
Exercisable (in dollars per share)	$ 9.76
Weighted-Average Remaining Contractual Term (years)
Options outstanding	8 years 1 month 6 days	6 years 3 months 18 days
Options exercisable	5 years 4 months 24 days

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Stock-Based Compensation - Summary of Restricted Unit Activity (Details) - Restricted stock units	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Units
Beginning outstanding balance (in shares) | shares	2,194,756
Granted (in shares) | shares	1,950,734
Cancelled/ Forfeited (in shares) | shares	(394,850)
Vested (in shares) | shares	(427,607)
Ending outstanding balance (in shares) | shares	3,323,033
Weighted-Average Grant-Data Fair Value
Beginning outstanding balance (in dollars per share) | $ / shares	$ 16.36
Granted (in dollars per share) | $ / shares	3.24
Forfeited (in dollars per share) | $ / shares	11.09
Vested (in dollars per share) | $ / shares	17.83
Ending outstanding balance (in dollars per share) | $ / shares	$ 9.09

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Stock-Based Compensation - Weighted-Average Assumptions Used to Determine the Fair Value of Options Granted (Details)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Share-Based Payment Arrangement [Abstract]
Volatility	61.29%	57.31%
Risk free interest rate	3.18%	1.09%
Expected life (years)	4 years 7 months 6 days	6 years 1 month 17 days
Dividend yield	0.00%	0.00%

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Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Leases [Abstract]
Operating lease, cost	$ 352	$ 280	$ 677	$ 473
Operating lease, weighted average remaining lease term	4 years 3 months 21 days		4 years 3 months 21 days
Operating lease, weighted average discount rate, percent	10.40%		10.40%
Finance lease, weighted average remaining lease term	4 years 8 months 15 days		4 years 8 months 15 days
Finance lease, weighted average discount rate, percent	22.70%		22.70%
Sales-type lease, term of contract	20 years		20 years
Sales-type lease, interest income, lease receivable	$ 128	$ 0	$ 1,166	$ 0
Sales-type lease, lease receivable	$ 1,438		$ 1,438		$ 347

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Leases - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Leases [Abstract]
Operating lease right-of-use asset, net	$ 4,772	$ 3,468	$ 3,662
Finance lease assets	89	28
Total lease assets	4,861	3,496
Liabilities
Operating lease liability, current portion	1,013	1,084
Finance lease liability	13	8
Operating lease liability, long-term	4,705	3,224
Finance lease liability	76	17
Present value of minimum lease payments	$ 5,807	$ 4,333
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities

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Leases - Future Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Operating Lease
Remainder of 2022	$ 730
2023	1,538
2024	1,617
2025	1,701
2026	1,420
Later years	0
Total minimum lease payments	7,006
Less amounts representing interest	1,288
Present value of minimum lease payments	5,718		$ 4,465
Financing Lease
Remainder of 2022	15
2023	31
2024	31
2025	31
2026	25
Later years	12
Total minimum lease payments	145
Less amounts representing interest	56
Present value of minimum lease payments	89
Total
Remainder of 2022	745
2023	1,569
2024	1,648
2025	1,732
2026	1,445
Later years	12
Total minimum lease payments	7,151
Less amounts representing interest	1,344
Present value of minimum lease payments	$ 5,807	$ 4,333

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Fair Value Measurement - Fair Value of Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private Placement Warrants	$ 89	$ 926
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private Placement Warrants	0	0
Fair Value, Inputs, Level 1 | Embedded Derivative Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative liability within the 2021 Convertible Notes	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private Placement Warrants	89	926
Fair Value, Inputs, Level 2 | Embedded Derivative Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative liability within the 2021 Convertible Notes	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Private Placement Warrants	0	0
Fair Value, Inputs, Level 3 | Embedded Derivative Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative liability within the 2021 Convertible Notes	$ 707	$ 12,359

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Fair Value Measurement - Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Change in fair value included in earnings	$ 3,978	$ 11,673
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the period	707	707	$ 4,664	$ 12,359
Additions	21	21
Change in fair value included in earnings	(3,978)	(11,673)
Balance at end of the period	$ 707	$ 707

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Fair Value Measurement - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Carrying Value | Notes receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 3,855	$ 3,650
Carrying Value | Note payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	14,016	18,695
Carrying Value | Equipment financing facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	5,581	6,371
Carrying Value | Yorkville Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	7,333	0
Carrying Value | 2021 Convertible Notes without embedded derivative liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	76,498	71,789
Fair Value | Fair Value, Inputs, Level 3 | Notes receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	2,062	2,805
Fair Value | Fair Value, Inputs, Level 3 | Note payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	9,867	14,607
Fair Value | Fair Value, Inputs, Level 3 | Equipment financing facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	4,847	5,951
Fair Value | Fair Value, Inputs, Level 3 | Yorkville Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	7,444	0
Fair Value | Fair Value, Inputs, Level 3 | 2021 Convertible Notes without embedded derivative liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 55,082	$ 61,866

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Shareholders’ Equity (Deficit) - Additional Info (Details)			3 Months Ended		6 Months Ended
	Jan. 22, 2021 tradingDay $ / shares shares	Nov. 16, 2020 tradingDay $ / shares shares	Jun. 30, 2022 USD ($) vote $ / shares shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2022 USD ($) vote $ / shares shares	Jun. 30, 2021 USD ($) shares	Mar. 31, 2022 shares	Dec. 31, 2021 $ / shares shares	Mar. 31, 2021 shares	Dec. 31, 2020 shares	May 22, 2020 $ / shares shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)			1,000,000		1,000,000			1,000,000
Preferred stock, shares issued (in shares)			0		0			0
Preferred stock, shares outstanding (in shares)			0		0			0
Common stock, shares authorized (in shares)			300,000,000		300,000,000			200,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001		$ 0.0001			$ 0.0001
Number of votes for each share | vote			1		1
Common stock, shares issued (in shares)		2,000,000	58,519,739		58,519,739			53,786,632
Common stock, shares outstanding (in shares)			58,519,739		58,519,739			53,786,632
Earnout period		5 years
Earnout period, threshold, business days | tradingDay		5
Earnout period, stock price trigger (in dollars per share) | $ / shares	$ 16.00	$ 16.00
Contingent consideration, equity, earnout period, threshold trading days | tradingDay	20	20
Earnout period, threshold consecutive trading days | tradingDay	30	30
Contingent consideration, liability (in shares)		1,718,000
Contingent consideration, liability, earnout period		5 years
Contingent liability, earnout period, threshold trading days | tradingDay	20	20
Contingent liability, earnout period, threshold consecutive trading days | tradingDay	30	30
Shares withheld from employee to cover payroll tax liability | $			$ 26,000	$ 0	$ 852,000	$ 0
Common stock to be purchased through warrants (in shares)											9,075,000
Price of common stock to be purchased through warrants (in dollars per share) | $ / shares											$ 11.50
Warrants outstanding (in shares)			7,001,654		7,001,654			7,002,254
Other Operating Income (Expense)
Class of Stock [Line Items]
Commitment fee for SEPA settled by common stock | $					$ 1,061,000
Standby Equity Purchase Agreement
Class of Stock [Line Items]
Cash received on issuance of shares | $					$ 5,000,000
Sale of stock, number of shares issued in transaction (in shares)					3,967,939
Sale of stock, price per share (in dollars per share) | $ / shares			$ 1.26		$ 1.26
Commitment fee for SEPA settled by common stock (in shares)					465,117
Block A Sponsor Earnout Shares
Class of Stock [Line Items]
Contingent consideration, liability (in shares)		859,000
Earnout period, stock price trigger (in dollars per share) | $ / shares		$ 12.00
Block B Sponsor Earnout Shares
Class of Stock [Line Items]
Contingent consideration, liability (in shares)		859,000
Earnout period, stock price trigger (in dollars per share) | $ / shares	$ 16.00	$ 16.00
Additional Paid-in Capital
Class of Stock [Line Items]
Shares withheld from employee to cover payroll tax liability | $			$ 26,000		$ 852,000
Common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)			58,519,739	53,353,858	58,519,739	53,353,858	53,980,608	53,786,632	51,801,267	48,943,082
Commitment fee for SEPA settled by common stock (in shares)			465,117		465,117
Issuance of contingently issuable common stock (in shares)	1,999,185					1,999,185
Exercise of warrants (in shares)			0	1,465,414	600	1,465,414

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Shareholders’ Equity (Deficit) - Anti-dilutive Securities (Details) - shares	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Stock options and restricted stock units
Class of Stock [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share (in shares)	8,080,793	4,154,478
Warrants
Class of Stock [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share (in shares)	7,326,654	7,609,586
Convertible Notes (if converted)
Class of Stock [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share (in shares)	8,692,061	0

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Subsequent Events (Details) - USD ($)		1 Months Ended	6 Months Ended
	Jul. 29, 2022	Jul. 31, 2022	Jun. 30, 2022	Jul. 22, 2022	Apr. 28, 2022
Standby Equity Purchase Agreement
Subsequent Event [Line Items]
Maximum borrowing capacity under agreement					$ 50,000,000
Sale of stock, number of shares issued in transaction (in shares)			3,967,939
Cash received on issuance of shares			$ 5,000,000
Sale of stock, price per share (in dollars per share)			$ 1.26
Subsequent event | Atlas Senior Term Loan Facility
Subsequent Event [Line Items]
Long-term debt, gross				$ 85,106,000
Credit agreement, additional capacity	$ 14,894,000
Minimum liquidity to be maintained	9,621,000
Maximum borrowing capacity under agreement	$ 15,000,000
Subsequent event | Atlas Senior Term Loan Facility | ABR Loans
Subsequent Event [Line Items]
Debt instruments, coupon rate	7.50%
Subsequent event | Atlas Senior Term Loan Facility | ABR Loans | Variable Rate, Option 2
Subsequent Event [Line Items]
Debt instruments, coupon rate	1.00%
Subsequent event | Atlas Senior Term Loan Facility | SOFR Loans
Subsequent Event [Line Items]
Debt instruments, coupon rate	8.50%
Subsequent event | Yorkville Convertible Note
Subsequent Event [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		3,393,663
Cash received on issuance of shares		$ 7,500,000
Sale of stock, price per share (in dollars per share)		$ 2.21
Subsequent event | SOFR | Atlas Senior Term Loan Facility | Variable Rate, Option 1
Subsequent Event [Line Items]
Variable rate spread	0.2616%
Subsequent event | NYFRB | Atlas Senior Term Loan Facility
Subsequent Event [Line Items]
Variable rate spread	0.50%