Exhibit 4

Shoals Technologies Group, Inc.

Lock-Up Agreement

January 26, 2021

Goldman Sachs & Co. LLC

J.P. Morgan Securities LLC

c/o Goldman Sachs & Co. LLC

200 West Street New York, NY 10282-2198

c/o J.P. Morgan Securities LLC

383 Madison Avenue

New York, New York 10179

Re: Shoals Technologies Group, Inc. - Lock-Up Agreement

Ladies and Gentlemen:

The undersigned understands that you, as representatives (the “Representatives”), propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) on behalf of the several Underwriters named in Schedule I to such agreement (collectively, the “Underwriters”), with Shoals Technologies Group, Inc., a Delaware corporation (the “Company”) and the selling stockholder identified therein, providing for a public offering of shares of Class A common stock, par value $0.001 per share (the “Class A Common Stock”), of the Company (the “Shares”) pursuant to a Registration Statement on Form S-1 to be filed with the Securities and Exchange Commission (the “SEC”). The undersigned further understands that, prior to the consummation of the public offering of the Shares, the Company will be authorized to issue, in addition to the Class A Common Stock, shares of Class B common stock, par value (the “Class B Common Stock” and, together with the Class A Common Stock, the “Common Stock”). Capitalized terms used herein and not otherwise defined shall have their meanings set forth in the Underwriting Agreement.

In consideration of the agreement by the Underwriters to offer and sell the Shares, and of other good and valuable consideration the receipt and sufficiency of which is hereby acknowledged, the undersigned agrees that, during the period beginning from the date of this Lock-Up Agreement and continuing to and including the date 180 days after the date set forth on the final prospectus used to sell the Shares (the “Lock-Up Period”), the undersigned shall not, and shall not cause or direct any of its affiliates to, (i) offer, sell, contract to sell, pledge, grant any option to purchase, lend or otherwise dispose of any shares of Common Stock of the Company, or any common units of Shoals Parent LLC (“Parent”), or any options or warrants to purchase any shares of Common Stock of the Company or common units of Parent, or any securities convertible into, exchangeable for or that represent the right to receive shares of Common Stock of the Company or any common units of Parent (such options, warrants or other securities, collectively, “Derivative Instruments”), including without limitation any such shares, units or Derivative

Instruments now owned or hereafter acquired by the undersigned (collectively, the “Securities”), (ii) engage in any hedging or other transaction or arrangement (including, without limitation, any short sale or the purchase or sale of, or entry into, any put or call option, or combination thereof, forward, swap or any other derivative transaction or instrument, however described or defined) which is designed to or which reasonably could be expected to lead to or result in a sale, loan, pledge or other disposition (whether by the undersigned or someone other than the undersigned), or transfer of any of the economic consequences of ownership, in whole or in part, directly or indirectly, of the Securities, whether any such transaction or arrangement (or instrument provided for thereunder) would be settled by delivery of Common Stock or other securities, in cash or otherwise (any such sale, loan, pledge or other disposition, or transfer of economic consequences, a “Transfer”) or (iii) otherwise publicly announce any intention to engage in or cause any action or activity described in clause (i) above or transaction or arrangement described in clause (ii) above. The undersigned represents and warrants that the undersigned is not, and has not caused or directed any of its affiliates to be or become, currently a party to any agreement or arrangement that provides for, is designed to or which reasonably could be expected to lead to or result in any Transfer during the Lock-Up Period. For the avoidance of doubt, the undersigned agrees that the foregoing provisions shall be equally applicable to any issuer-directed or other Shares the undersigned may purchase in the offering.

If the undersigned is not a natural person, the undersigned represents and warrants that no single natural person, entity or “group” (within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended), other than a natural person, entity or “group” (as described above) that has executed a Lock-Up Agreement in substantially the same form as this Lock-Up Agreement, beneficially owns, directly or indirectly, 50% or more of the common equity interests, or 50% or more of the voting power, in the undersigned.

If the undersigned is an officer or director of the Company, (i) Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC agree that, at least three business days before the effective date of any release or waiver of the foregoing restrictions in connection with a transfer of shares of Common Stock, Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC will notify the Company of the impending release or waiver, and (ii) the Company has agreed in the Underwriting Agreement to announce the impending release or waiver by press release through a major news service at least two business days before the effective date of the release or waiver. Any release or waiver granted by Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC hereunder to any such officer or director shall only be effective two business days after the publication date of such press release. The provisions of this paragraph will not apply if (a) the release or waiver is effected solely to permit a transfer not for consideration and (b) the transferee has agreed in writing to be bound by the same terms described in this letter to the extent and for the duration that such terms remain in effect at the time of the transfer.

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Notwithstanding the foregoing, the undersigned may Transfer the Securities during the Lock-Up Period:

(i) the Shares to be sold by the undersigned pursuant to the Underwriting Agreement and any reclassification, conversion or exchange in connection with such sale of Shares;

(ii) as a bona fide gift or gifts, or as charitable contributions, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, and provided further that no filing under Section 16(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (other than a Form 5, which shall not be filed on or prior date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

(iii) to any trust, partnership, limited liability company or any other entity for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

(iv) to any beneficiary of or estate of a beneficiary of the undersigned pursuant to a trust, will, other testamentary document or intestate succession or applicable laws of descent, provided that the beneficiary or the estate of a beneficiary thereof agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transaction shall not involve a disposition for value and that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

(v) to a partnership, limited liability company or other entity of which the undersigned and the immediate family of the undersigned are the legal and beneficial owner of all the outstanding equity securities or similar interests, provided that such partnership, limited liability company or other entity agrees to be bound in writing by the restrictions set forth herein, and provided further that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

(vi) by operation of law, such as pursuant to a qualified domestic order of a court (including a divorce settlement, divorce decree or separation agreement) or regulatory agency, provided that the transferee or transferees thereof agree to be bound in writing by the restrictions set forth herein, and provided further that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

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(vii) in transactions relating to shares of Common Stock acquired in open market transactions after the completion of the public offering, provided that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of such shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period;

(viii) by (A) the exercise of stock options solely with cash granted pursuant to equity incentive plans described in the Registration Statement, and the receipt by the undersigned from the Company of shares of Common Stock upon such exercise; (B) transfers of shares of Common Stock to the Company upon the “net” or “cashless” exercise of stock options or other equity awards granted pursuant to equity incentive plans described in the Registration Statement; (C) transfers of shares of Common Stock of the Company for the primary purpose of satisfying any tax or other governmental withholding obligation with respect to any award of equity-based compensation granted pursuant to the Company’s equity incentive plans; or (D) forfeitures of shares of Common Stock to the Company to satisfy tax withholding requirements of the undersigned or the Company upon the vesting, during the Lock-Up Period, of equity based awards granted under equity incentive plans or pursuant to other stock purchase arrangements, in each case described in the Registration Statement; provided that, in each case, the underlying shares of Common Stock shall continue to be subject to the restrictions on transfer set forth in this Lock Up Agreement, and provided further that, if required, any public report or filing under Section 16(a) of the Exchange Act shall indicate in the footnotes thereto the nature of the transaction;

(ix) pursuant to a bona fide third-party tender offer, merger, consolidation or other similar transaction made to all holders of the Company’s capital stock after the consummation of the public offering, involving a change of control of the Company, or group of persons, shall become, after the closing of the transaction, the beneficial owner (as defined in Rules 13d-3 and 13d-5 of the Exchange Act) of more than 50% of total voting power of the voting securities of the Company), provided that in the event that such tender offer, merger, consolidation or other such transaction is not completed, the undersigned’s shares of Common Stock shall remain subject to the provisions of this Lock-Up Agreement;

(x) to the Company in connection with the repurchase by the Company from the undersigned of shares of Common Stock of the Company or Derivative Instruments pursuant to a repurchase right arising upon the termination of the undersigned’s employment with the Company; provided that such repurchase right is pursuant to contractual agreements with the Company; and provided further that, if required, any public report or filing under Section 16(a) of the Exchange Act shall indicate in the footnotes thereto the nature of the transaction;

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(xi) the establishment of a trading plan pursuant to Rule 10b5-1 under the Exchange Act for the transfer of shares of Common Stock; provided that (i) such plan does not provide for the transfer of Common Stock during the Lock-Up Period and (ii) no public announcement or filing under the Exchange Act shall be made by or on behalf of the undersigned or the Company regarding the establishment of such plan during the Lock-Up Period;

(xii) if the undersigned is a corporation, partnership, limited liability company or other business entity, by (A) distributions of shares of Common Stock or any Derivative Instrument to limited partners, general partners, members, stockholders holders of similar interests of the undersigned (or in each case its nominee or custodian) or to any investment holding company controlled or managed by the undersigned or (B) transfers of shares of Common Stock or any Derivative Instrument to affiliates (as defined in Rule 405 of the Securities Act of 1933, as amended) or other entities controlled or managed by the undersigned or any of its affiliates (other than the Company and its subsidiaries); provided that each distributee and transferee agrees to be bound in writing by the restrictions set forth herein, and provided further that no filing under Section 16(a) of the Exchange Act (other than a Form 5, which shall not be filed on or prior to the date that is 120 days after the date set forth on the final prospectus used to sell the Shares), reporting a reduction in beneficial ownership of shares of Common Stock, shall be required or shall be voluntarily made during the Lock-Up Period; or

(xiii) with the prior written consent of Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC on behalf of the Underwriters.

For purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin, and “change of control” shall mean any bona fide third-party tender offer, merger, consolidation or other similar transaction approved by the board of directors of the Company the result of which is that any “person” (as defined in Section 13(d)(3) of the Exchange Act), or group of persons, other than the Company, shall become, after the closing of the transaction, the beneficial owner (as defined in Rules 13d-3 and 13d-5 of the Exchange Act) of more than 50% of total voting power of the voting stock of the Company. In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital stock of the Company to any wholly-owned subsidiary of such corporation; provided, however, that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital stock subject to the provisions of this Agreement and there shall be no further transfer of such capital stock except in accordance with this Agreement, and provided further that any such transfer shall not involve a disposition for value.

The undersigned agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the undersigned’s Securities except in compliance with the foregoing restrictions.

The undersigned understands that the Company and the Underwriters are relying upon this Lock-Up Agreement in proceeding toward consummation of the offering. The undersigned further understands that this Lock-Up Agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representatives, successors, and assigns.

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This Lock-Up Agreement will automatically terminate upon the earliest to occur, if any, of (a) the date that the Company advises Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC, in writing, prior to the execution of the Underwriting Agreement, that it has determined not to proceed with the public offering, (b) the date that Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC advise the Company, in writing, prior to the execution of the Underwriting Agreement, that the Underwriters have determined not to proceed with the public offering (c) the date of termination of the Underwriting Agreement if prior to the closing of the public offering, or (d) January 31, 2021 if the public offering of the Shares has not been completed by such date.

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Very truly yours,

OAKTREE POWER OPPORTUNITIES FUND IV

(DELAWARE) HOLDINGS, L.P.

Exact Name of Stockholder

By: Oaktree Fund GP, LLC

Its: General Partner

By: Oaktree Fund GP I, L.P.

Its: Managing Member

/s/ Peter Jonna

Authorized Signature

Peter Jonna

Name

Authorized Signatory

Title

/s/ Jason Lee

Authorized Signature

Jason Lee

Name

Authorized Signatory

Title

[Signature Page to Lock-Up Agreement]