Exhibit 3.1

Delaware

The First State

Page 1

I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE RESTATED CERTIFICATE OF “CLEANTECH ACQUISITION CORP.”, FILED IN THIS OFFICE ON THE FOURTEENTH DAY OF JULY, A.D. 2021, AT 1:46 O’CLOCK P.M.

3093231 8100 SR# 20212703907
		Authentication: 203675298
		Date: 07-14-21
You may verify this certificate online at corp.delaware.gov/authver.shtml

State of Delaware

Secretary of State

Division of Corporations

Delivered 01:46 PM 07/14/2021

FILED 01:46 PM 07/14/2021

SR 20212703907 - File Number 3093231

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

CLEANTECH ACQUISITION CORP.

Pursuant to Section 242 and 245 of the

Delaware General Corporation Law

CleanTech Acquisition Corp., a corporation existing under the laws of the State of Delaware (the “Corporation”), by its Chief Executive Officer, hereby certifies as follows:

1. The name of the corporation is “CleanTech Acquisition Corp.”.

2. The Corporation’s Certificate of Incorporation was filed in the office of the Secretary of State of the State of Delaware on June 18, 2020 under the name Chardan Healthcare Acquisition 5 Corp.

3. This Amended Restated Certificate of Incorporation restates, integrates and amends the Certificate of Incorporation of the Corporation.

4. This Amended and Restated Certificate of Incorporation was duly adopted by the directors and stockholders of the Corporation in accordance with the applicable provisions of the General Corporation Law of the State of Delaware (“GCL”).

5. The text of the Certificate of Incorporation of the Corporation is hereby amended and restated to read in full as follows:

FIRST: The name of the corporation is “CleanTech Acquisition Corp.” (hereinafter called the “Corporation”).

SECOND: The registered office of the Corporation is to be located at Corporate Creations Network Inc., 3411 Silverside Road, Tatnall Building Suite 104, County of New Castle, Wilmington DE 19810.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of Delaware (“GCL”).

FOURTH: The name and mailing address of the incorporator is: Jaszick Maldonado, c/o Loeb & Loeb LLP, 345 Park Avenue, New York. NY 10154.

FIFTH: The total number of shares of all classes of capital stock which the Corporation shall have authority to issue is 201,000,000, of which 200,000,000 shares shall be common stock, par value $0.0001 per share (“Common Stock”), and 1,000,000 shares shall be preferred stock, par value $0.0001 per share (“Preferred Stock”).

A. Preferred Stock. The Board of Directors is expressly granted authority to issue shares of the Preferred Stock, in one or more series, and to fix for each such series such voting powers, full or limited, and such designations, preferences and relative, participating, optional or other special rights and such qualifications, limitations or restrictions thereof as shall be stated and expressed in the resolution or resolutions adopted by the Board of Directors providing for the issue of such series (a “Preferred Stock Designation”) and as may be permitted by the GCL. The number of authorized shares of Preferred Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority of the voting power of all of the then outstanding shares of the capital stock of the Corporation entitled to vote generally in the election of directors, voting together as a single class, without a separate vote of the holders of the Preferred Stock, or any series thereof, unless a vote of any such holders is required pursuant to any Preferred Stock Designation.

B. Common Stock. Except as otherwise required by law or as otherwise provided in any Preferred Stock Designation, the holders of the Common Stock shall exclusively possess all voting power and each share of Common Stock shall have one vote.

SIXTH: This Article Sixth shall apply during the period commencing upon the filing of this Certificate of Incorporation and terminating upon the consummation of any “Business Combination” (as defined below). A “Business Combination” shall mean any merger, capital stock exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination involving the Corporation and one or more businesses or entities (“Target Business”), or entering into contractual arrangements that give the Corporation control over such a Target Business, and, if the Corporation is then listed on a national securities exchange, the Target Business has a fair market value equal to at least 80% of the balance in the Trust Fund (defined below), less any taxes payable on interest earned, at the time of signing a definitive agreement in connection with the initial Business Combination. “IPO Shares” shall mean the shares sold pursuant to the registration statement on Form S-1 (“Registration Statement”) filed with the Securities and Exchange Commission (“Commission”) in connection with the Corporation’s initial public offering (“IPO”). The “fair market value” for purposes of this Article Sixth will be determined by the Board of Directors of the Corporation based upon one or more standards generally accepted by the financial community (such as actual and potential sales, earnings, cash flow and/or book value). If the Board of Directors is unable to independently determine the fair market value of the Target Business, the Corporation will obtain an opinion from an independent investment banking firm, or another independent entity that commonly renders valuation opinions, with respect to the satisfaction of such criteria.

A. Prior to the consummation of a Business Combination, the Corporation shall either (i) submit any Business Combination to its holders of Common Stock for approval (“Proxy Solicitation”) pursuant to the proxy rules promulgated under the Securities Exchange Act of 1934, as amended (“Exchange Act”), or (ii) provide its holders of IPO Shares with the opportunity to sell their shares to the Corporation by means of a tender offer (“Tender Offer”).

B. If the Corporation engages in a Proxy Solicitation with respect to a Business Combination, the Corporation will consummate the Business Combination only if a majority of the then outstanding shares of Common Stock present and entitled to vote at the meeting to approve the Business Combination are voted for the approval of such Business Combination.

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C. In the event that a Business Combination is consummated by the Corporation or the Corporation holds a vote of its stockholders to amend its Certificate of Incorporation, any holder of IPO Shares who (i) followed the procedures contained in the proxy materials to perfect the holder’s right to convert the holder’s IPO Shares into cash, if any, or (ii) tendered the holder’s IPO Shares as specified in the tender offer materials therefore, shall be entitled to receive the Conversion Price (as defined below) in exchange for the holder’s IPO Shares. The Corporation shall, promptly after consummation of the Business Combination or the filing of the amendment to the Certificate of Incorporation with the Secretary of State of the State of Delaware, convert such shares into cash at a per share price equal to the quotient determined by dividing (i) the amount then held in the Trust Fund (as defined below) less any income taxes owed on such funds but not yet paid, calculated as of two business days prior to the consummation of the Business Combination or the filing of the amendment, as applicable, by (ii) the total number of IPO Shares then outstanding (such price being referred to as the “Conversion Price”). “Trust Fund” shall mean the trust account established by the Corporation at the consummation of its IPO and into which the amount specified in Registration Statement is deposited. Notwithstanding the foregoing, a holder of IPO Shares, together with any affiliate of his or any other person with whom he is acting in concert or as a “group” (within the meaning of Section 13(d)(3) of the Exchange Act) (“Group”) with, will be restricted from demanding conversion in connection with a proposed Business Combination with respect to 20.0% or more of the IPO Shares. Accordingly, all IPO Shares beneficially owned by such holder or any other person with whom such holder is acting in concert or as a Group with in excess of 20.0% or more of the IPO Shares will remain outstanding following consummation of such Business Combination in the name of the stockholder and not be converted.

D. The Corporation will not consummate any Business Combination unless it (or any successor) has net tangible assets of at least $5,000,001 upon consummation of such Business Combination.

E. In the event that the Corporation does not consummate a Business Combination by (i) 12 months from the consummation of the IPO or (ii) up to 18 months from the consummation of the IPO if the Corporation elects to extend the amount of time to complete a Business Combination in accordance with the terms of the Investment Management Trust Agreement between the Corporation and Continental Stock Transfer & Trust Company (in either case, such date being referred to as the “Termination Date”), the Corporation shall (i) cease all operations except for the purposes of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter redeem 100% of the IPO Shares for cash for a redemption price per share as described below (which redemption will completely extinguish such holders’ rights as stockholders, including the right to receive further liquidation distributions, if any), and (iii) as promptly as reasonably possible following such redemption, subject to approval of the Corporation’s then stockholders and subject to the requirements of the GCL, including the adoption of a resolution by the Board of Directors pursuant to Section 275(a) of the GCL finding the dissolution of the Corporation advisable and the provision of such notices as are required by said Section 275(a) of the GCL, dissolve and liquidate the balance of the Corporation’s net assets to its remaining stockholders, as part of the Corporation’s plan of dissolution and liquidation, subject (in the case of (ii) and (iii) above) to the Corporation’s obligations under the GCL to provide for claims of creditors and other requirements of applicable law (“Dissolve”). In such event, the per share redemption price shall be equal to a pro rata share of the Trust Fund plus any pro rata interest earned on the funds held in the Trust Fund and not previously released to the Corporation for its working capital requirements or necessary to pay its taxes divided by the total number of IPO Shares then outstanding. In the event that the Corporation does not timely make all additional deposits into its Trust Account as required by the Corporation’s Investment Management Trust Agreement entered into at the time of the IPO, as amended, the Corporation shall Dissolve.

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F. A holder of IPO Shares shall only be entitled to receive distributions from the Trust Fund in the event (i) he demands conversion of his shares in accordance with paragraph C above or (ii) that the Corporation has not consummated a Business Combination by the Termination Date as described in paragraph E above. In no other circumstances shall a holder of IPO Shares have any right or interest of any kind in or to the Trust Fund. A public holder that holds IPO Shares beneficially through a nominee must identify itself to the Corporation in connection with any election to receive distributions from the Trust Fund in order to validly convert such IPO Shares in accordance with paragraph C above.

G. Prior to the consummation of a Business Combination, the Board of Directors may not issue (i) any shares of Common Stock or any securities convertible into Common Stock; or (ii) any securities which participate in or are otherwise entitled in any manner to any of the proceeds in the Trust Fund or which vote as a class with the Common Stock on a Business Combination.

H. If any amendment is made (A) to this Article Sixth that would modify the substance or timing of the Corporation’s obligation to provide for the conversion of the IPO Shares in connection with an initial Business Combination or to redeem 100% of the IPO Shares if the Corporation has not consummated an initial Business by the Termination Date or (B) with respect to any other provision in this Article Sixth, the holders of IPO Shares shall be provided with the opportunity to redeem their IPO Shares upon the approval of any such amendment, at the per-share price specified in paragraph C. above.

SEVENTH: The following provisions are inserted for the management of the business and for the conduct of the affairs of the Corporation, and for further definition, limitation and regulation of the powers of the Corporation and of its directors and stockholders:

A. Election of directors need not be by ballot unless the by-laws of the Corporation so provide.

B. The Board of Directors shall have the power, without the assent or vote of the stockholders, to make, alter, amend, change, add to or repeal the by-laws of the Corporation as provided in the by-laws of the Corporation.

C. The directors in their discretion may submit any contract or act for approval or ratification at any annual meeting of the stockholders or at any meeting of the stockholders called for the purpose of considering any such act or contract, and any contract or act that shall be approved or be ratified by the vote of the holders of a majority of the stock of the Corporation which is represented in person or by proxy at such meeting and entitled to vote thereat (provided that a lawful quorum of stockholders be there represented in person or by proxy) shall be as valid and binding upon the Corporation and upon all the stockholders as though it had been approved or ratified by every stockholder of the Corporation, whether or not the contract or act would otherwise be open to legal attack because of directors’ interests, or for any other reason.

D. In addition to the powers and authorities hereinbefore or by statute expressly conferred upon them, the directors are hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation; subject, nevertheless, to the provisions of the statutes of Delaware, of this Amended and Restated Certificate of Incorporation, and to any bylaws from time to time made by the stockholders; provided, however, that no bylaw so made shall invalidate any prior act of the directors which would have been valid if such bylaw had not been made.

EIGHTH:

A. A director of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except for liability (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the GCL, or (iv) for any transaction from which the director derived an improper personal benefit. If the GCL is amended to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of a director of the Corporation shall be eliminated or limited to the fullest extent permitted by the GCL, as so amended. Any repeal or modification of this paragraph A by the stockholders of the Corporation shall not adversely affect any right or protection of a director of the Corporation with respect to events occurring prior to the time of such repeal or modification. To the extent allowed by law, the doctrine of corporate opportunity, or any other analogous doctrine, shall not apply with respect to the Corporation or any of its officers or directors, and the Corporation renounces any expectancy that any of the directors or officers of the Corporation will offer any such corporate opportunity of which he or she may become aware to the Corporation, except, the doctrine of corporate opportunity shall apply with respect to any of the directors or officers of the Corporation only with respect to a corporate opportunity that was offered to such person solely in his or her capacity as a director or officer of the Corporation and such opportunity is one the Corporation is legally and contractually permitted to undertake and would otherwise be reasonable for the Corporation to pursue. The Corporation, to the full extent permitted by Section 145 of the GCL, as amended from time to time, shall indemnify all persons whom it may indemnify pursuant thereto. Expenses (including attorneys’ fees) incurred by an officer or director in defending any civil, criminal, administrative, or investigative action, suit or proceeding for which such officer or director may be entitled to indemnification hereunder shall be paid by the Corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that he or she is not entitled to be indemnified by the Corporation as authorized hereby.

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B. Notwithstanding the foregoing provisions of this Article Eighth, no indemnification nor advancement of expenses will extend to any claims made by the Company’s officers and directors to cover any loss that such individuals may sustain as a result of such individuals’ agreement to pay debts and obligations to target businesses or vendors or other entities that are owed money by the Corporation for services rendered or contracted for or products sold to the Corporation, as described in the Registration Statement.

NINTH: Whenever a compromise or arrangement is proposed between this Corporation and its creditors or any class of them and/or between this Corporation and its stockholders or any class of them, any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of this Corporation or of any creditor or stockholder thereof or on the application of any receiver or receivers appointed for this Corporation under Section 291 of Title 8 of the Delaware Code or on the application of trustees in dissolution or of any receiver or receivers appointed for this Corporation under Section 279 of Title 8 of the Delaware Code order a meeting of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this Corporation, as the case may be, to be summoned in such manner as the said court directs. If a majority in number representing three fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of this Corporation, as the case may be, agree to any compromise or arrangement and to any reorganization of this Corporation as a consequence of such compromise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of this Corporation, as the case may be, and also on this Corporation.

TENTH:

A. The Corporation hereby expressly elects not to be governed by Section 203 of the GCL.

B. Notwithstanding the foregoing, the Corporation shall not engage in any Business Combination, at any point in time at which the Corporation’s Common Stock is registered under Section 12(b) or 12(g) of the Exchange Act with any interested stockholder (as defined below) for a period of three (3) years following the time that such stockholder became an interested stockholder, unless: (a) prior to such time, the Board approved either the Business Combination or the transaction which resulted in the stockholder becoming an interested stockholder, or (b) upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least eighty-five percent (85%) of the voting stock outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding (but not the outstanding voting stock owned by the interested stockholder) those shares owned by (i) persons who are directors and also officers of the Corporation and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer, or (c) at or subsequent to that time, the Business Combination is approved by the Board and authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least 66-2/3% of the outstanding voting stock that is not owned by the interested stockholder.

C. For purposes of this Article Tenth:

(a) “interested stockholder” means any person (other than the Corporation or any direct or indirect majority-owned subsidiary of the Corporation) that (i) is the owner of fifteen percent (15%) or more of the voting stock of the Corporation, or (ii) is an affiliate or associate of the Corporation and was the owner of fifteen percent (15%) or more of the voting stock of the Corporation at any time within the three (3) year period immediately prior to the date on which it is sought to be determined whether such person is an interested stockholder; and the affiliates and associates of such person; but “interested stockholder” shall not include (a) any Exempted Person (as defined below), or (b) any person whose ownership of shares in excess of the fifteen percent (15%) limitation set forth herein is the result of any action taken solely by the Corporation; provided that with respect to clause (b) such person shall be an interested stockholder if thereafter such person acquires additional shares of voting stock of the Corporation, except as a result of further corporate action not caused, directly or indirectly, by such person. For the purpose of determining whether a person is an interested stockholder, the voting stock of the Corporation deemed to be outstanding shall include stock deemed to be owned by the person through application of the definition of “owner” below but shall not include any other unissued stock of the Corporation which may be issuable pursuant to any agreement, arrangement or understanding, or upon exercise of conversion rights, warrants or options, or otherwise.

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(b) “Exempted Person” means CleanTech Sponsor I LLC and CleanTech Investments, LLC and their affiliates, any of their respective direct or indirect transferees of at least 20% of the Corporation’s outstanding common stock, and any “group” of which any such person is a part under Rule 13d-5 of the Exchange Act.

(c) “owner,” including the terms “own” and “owned,” when used with respect to any stock, means a person that individually or with or through any of its affiliates or associates:

(1) beneficially owns such stock, directly or indirectly; or

(2) has (a) the right to acquire such stock (whether such right is exercisable immediately or only after the passage of time) pursuant to any agreement, arrangement or understanding, or upon the exercise of conversion rights, exchange rights, warrants or options, or otherwise; provided, however, that a person shall not be deemed the owner of stock tendered pursuant to a tender or exchange offer made by such person or any of such person’s affiliates or associates until such tendered stock is accepted for purchase or exchange; or (b) the right to vote such stock pursuant to any agreement, arrangement or understanding; provided, however, that a person shall not be deemed the owner of any stock because of such person’s right to vote such stock if the agreement, arrangement or understanding to vote such stock arises solely from a revocable proxy or consent given in response to a proxy or consent solicitation made to ten (10) or more persons; or

(3) has any agreement, arrangement or understanding for the purpose of acquiring, holding, voting (except voting pursuant to a revocable proxy or consent as described in item (b) of subsection (2) above), or disposing of such stock with any other person that beneficially owns, or whose affiliates or associates beneficially own, directly or indirectly, such stock.

ELEVENTH:

A. Unless the Corporation consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery of the State of Delaware lacks subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware) and any appellate court therefrom shall be the sole and exclusive forum for the following claims or causes of action under the Delaware statutory or common law: (A) any derivative claim or cause of action brought on behalf of the Corporation; (B) any claim or cause of action for breach of a fiduciary duty owed by any current or former director, officer, employee or agent of the Corporation, to the Corporation or the Corporation’s stockholders, or any claim or cause of action for aiding and abetting any such breach; (C) any claim or cause of action against the Corporation or any current or former director, officer or other employee of the Corporation, arising out of or pursuant to any provision of the GCL, this Amended and Restated Certificate of Incorporation or the bylaws of the Corporation (as each may be amended from time to time); (D) any claim or cause of action seeking to interpret, apply, enforce or determine the validity of this Amended and Restated Certificate of Incorporation or the bylaws of the Corporation (as each may be amended from time to time, including any right, obligation, or remedy thereunder); (E) any claim or cause of action as to which the GCL confers jurisdiction on the Court of Chancery of the State of Delaware; and (F) any claim or cause of action against the Corporation or any current or former director, officer or other employee of the Corporation, governed by the internal-affairs doctrine, in all cases to the fullest extent permitted by law and subject to the court having personal jurisdiction over the indispensable parties named as defendants. This Article Eleventh shall not apply to claims or causes of action brought to enforce a duty or liability created by the Securities Act of 1933, as amended (the “1933 Act”), or the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction. Stockholders cannot waive compliance with the federal securities laws and the rules and regulations thereunder.

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B. If any action the subject matter of which is within the scope of Paragraph A of this Article Eleventh immediately above is filed in a court other than a court located within the State of Delaware (a “Foreign Action”) in the name of any stockholder, such stockholder shall be deemed to have consented to (i) the personal jurisdiction of the state and federal courts located within the State of Delaware in connection with any action brought in any such court to enforce Paragraph A of this Article Eleventh immediately above (an “FSC Enforcement Action”) and (ii) having service of process made upon such stockholder in any such FSC Enforcement Action by service upon such stockholder’s counsel in the Foreign Action as agent for such stockholder.

C. If any provision or provisions of this Article Eleventh shall be held to be invalid, illegal or unenforceable as applied to any person or entity or circumstance for any reason whatsoever, then, to the fullest extent permitted by law, the validity, legality and enforceability of such provisions in any other circumstance and of the remaining provisions of this Article Eleventh (including, without limitation, each portion of any sentence of this Article Eleventh containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities and circumstances shall not in any way be affected or impaired thereby. Any person or entity purchasing or otherwise acquiring any interest in shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this Article Eleventh.

IN WITNESS WHEREOF, the Corporation has caused this Amended and Restated Certificate of Incorporation to be signed by Eli Spiro, its Chief Executive Officer, as of the 14^th day of July, 2021.

/s/ Eli Spiro

Eli Spiro, Chief Executive Officer

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