<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-08-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001855447</issuerCik>
        <issuerName>TIGO ENERGY, INC.</issuerName>
        <issuerTradingSymbol>TYGO</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001084951</rptOwnerCik>
            <rptOwnerName>ALON ZVI</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>983 UNIVERSITY AVENUE, SUITE B</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS GATOS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95032</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO / Chairperson</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-08-07</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>233900</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1411593</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-08-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>29496</value>
                    <footnoteId id="F5"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1382097</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F6"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1774826</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Revocable Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12689306</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Alon Ventures, LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of common stock, par value $0.0001 per share (&quot;Common Stock&quot;), underlying restricted stock units (&quot;RSUs&quot;) granted to the reporting person on August 7, 2026 (the &quot;August 2026 Grant Date&quot;) pursuant to the Issuer's 2023 Incentive Plan. One-Third (1/3) of the RSUs shall vest, and an equal number of shares of Common Stock will be deliverable to the reporting person, on each of the first three anniversaries of the August 2026 Grant Date, subject to continued service through each such vesting date.</footnote>
        <footnote id="F2">Includes 28,475 shares of Common Stock underlying RSUs granted to the reporting person on August 11, 2023 (the &quot;August 2023 Grant Date&quot;), 222,220 shares of Common Stock underlying RSUs granted to the reporting person on September 16, 2024 (the &quot;September 2024 Grant Date&quot;), and 240,458 shares of Common Stock underlying RSU's granted to the reporting person on August 1, 2025 (the &quot;August 2025 Grant Date&quot;) in each case, pursuant to the Issuer's 2023 Incentive Plan.</footnote>
        <footnote id="F3">(Continuation of the Footnote (2)) One-Third (1/3) of the RSUs initially granted to the reporting person on August 11, 2023 vested and an equal number of shares of Common Stock were delivered to the reporting person on August 11, 2024, August 11, 2025, and August 11, 2026. One-Third (1/3) of the RSUs granted to the reporting person on September 16, 2024 vested and were delivered to the reporting person on September 16, 2025 and one-third of the RSUs subject to the grant shall vest, and an equal number of shares of Common Stock will be deliverable to the reporting person, on each of the second and third anniversaries of the September 2024 Grant Date, subject to continued service through each such vesting date.</footnote>
        <footnote id="F4">One-Third (1/3) of the RSUs granted to the reporting person on August 1, 2025 vested and an equal number of shares of Common Stock were delivered to the reporting person on August 1, 2026, and one-third of the RSUs subject to the grant shall vest, and an equal number of shares of Common Stock will be deliverable to the reporting person on each of the second and third anniversaries of the August 2025 Grant Date, subject to continued service through each such vesting date.</footnote>
        <footnote id="F5">Represents shares of common stock, par value $0.0001 per share (&quot;Common Stock&quot;) withheld in an exempt disposition to the Issuer under Rule 16b-3(e) to satisfy tax withholding obligations of the reporting person arising out of the vesting of previously reported restricted stock units (&quot;RSUs&quot;).</footnote>
        <footnote id="F6">Includes 222,220 shares of Common Stock underlying RSUs granted to the reporting person on September 16, 2024 (the &quot;September 2024 Grant Date&quot;), and 240,458 shares of Common Stock underlying RSU's granted to the reporting person on August 1, 2025 (the &quot;August 2025 Grant Date&quot;), and 233,900 shares of Common Stock underlying RSUs granted to the reporting person on August 7, 2026 (the &quot;August 2026 Grant Date&quot;), in each case, pursuant to the Issuer's 2023 Incentive Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Bill Roeschlein, as attorney-in-fact</signatureName>
        <signatureDate>2026-08-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
