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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4/A </documentType> |
| <periodOfReport> 2020-06-19 </periodOfReport> |
| <dateOfOriginalSubmission> 2020-06-19 </dateOfOriginalSubmission> |
| <notSubjectToSection16> 0 </notSubjectToSection16> |
| <issuer> |
| | <issuerCik> 0001103795 </issuerCik> |
| | <issuerName> QS Energy, Inc. </issuerName> |
| | <issuerTradingSymbol> QSEP </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001706453 </rptOwnerCik> |
| | | <rptOwnerName> Munn Richard William </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> 23902 FM 2978 </rptOwnerStreet1> |
| | | <rptOwnerStreet2></rptOwnerStreet2> |
| | | <rptOwnerCity> TOMBALL </rptOwnerCity> |
| | | <rptOwnerState> TX </rptOwnerState> |
| | | <rptOwnerZipCode> 77375 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | <isOfficer> 0 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle></officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <derivativeTable> |
| | <derivativeTransaction> |
| | | <securityTitle> |
| <value> Convertible Note </value> |
| </securityTitle> |
| | | <conversionOrExercisePrice> |
| <value> 0.035 </value> |
| </conversionOrExercisePrice> |
| | | <transactionDate> |
| <value> 2020-06-19 </value> |
| </transactionDate> |
| | | <deemedExecutionDate> |
| <value> 2020-06-19 </value> |
| </deemedExecutionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionTotalValue> |
| <value> 10000 </value> |
| <footnoteId id="F1"/> |
| </transactionTotalValue> |
| <transactionPricePerShare> |
| <footnoteId id="F1"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <exerciseDate> |
| <value> 2020-06-19 </value> |
| </exerciseDate> |
| | | <expirationDate> |
| <footnoteId id="F2"/> |
| </expirationDate> |
| | | <underlyingSecurity> |
| <underlyingSecurityTitle> |
| <value> Common Stock </value> |
| </underlyingSecurityTitle> |
| <underlyingSecurityShares> |
| <value> 314285 </value> |
| </underlyingSecurityShares> |
| </underlyingSecurity> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 1910396 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </derivativeTransaction> |
| | <derivativeTransaction> |
| | | <securityTitle> |
| <value> Warrants </value> |
| </securityTitle> |
| | | <conversionOrExercisePrice> |
| <value> 0.035 </value> |
| </conversionOrExercisePrice> |
| | | <transactionDate> |
| <value> 2020-06-19 </value> |
| </transactionDate> |
| | | <deemedExecutionDate> |
| <value> 2020-06-19 </value> |
| </deemedExecutionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionTimeliness></transactionTimeliness> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 157143 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <footnoteId id="F3"/> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <exerciseDate> |
| <value> 2020-06-19 </value> |
| </exerciseDate> |
| | | <expirationDate> |
| <value> 2021-06-19 </value> |
| </expirationDate> |
| | | <underlyingSecurity> |
| <underlyingSecurityTitle> |
| <value> Common Stock </value> |
| </underlyingSecurityTitle> |
| <underlyingSecurityShares> |
| <value> 157143 </value> |
| </underlyingSecurityShares> |
| </underlyingSecurity> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 2067539 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </derivativeTransaction> |
| | </derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> Reporting Person acquired Issuer's Convertible Note in the principal amount of $11,000, for a purchase price of $10,000, convertible into 314,285 shares of common stock of Issuer. </footnote> |
| | <footnote id="F2"> Not Applicable. </footnote> |
| | <footnote id="F3"> Reporting Person acquired Issuer's Warrants as part of Reporting Person's purchase of Issuer's Convertible Note reported above. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/ Richard W. Munn </signatureName> |
| | <signatureDate> 2020-06-20 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |