-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 3JsNZH25hAIVWLNSf0W5uA==

<SEC-DOCUMENT>0001209191-10-027742.txt : 20100513
<SEC-HEADER>0001209191-10-027742.hdr.sgml : 20100513
<ACCEPTANCE-DATETIME>20100513184410
ACCESSION NUMBER:		0001209191-10-027742
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100512
FILED AS OF DATE:		20100513
DATE AS OF CHANGE:		20100513

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lehman Scott B.
		CENTRAL INDEX KEY:			0001454923

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34044
		FILM NUMBER:		10830155

	MAIL ADDRESS:	
		STREET 1:		833 WEST SOUTH BOULDER ROAD
		CITY:			LOUISVILLE
		STATE:			CO
		ZIP:			80027-2452

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Real Goods Solar, Inc.
		CENTRAL INDEX KEY:			0001425565
		STANDARD INDUSTRIAL CLASSIFICATION:	HEATING EQUIPMENT, EXCEPT ELECTRIC & WARM AIR FURNACES [3433]
		IRS NUMBER:				261851813
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		360 INTERLOCKEN BOULEVARD
		CITY:			BROOMFIELD
		STATE:			CO
		ZIP:			80021
		BUSINESS PHONE:		303-222-3600

	MAIL ADDRESS:	
		STREET 1:		360 INTERLOCKEN BOULEVARD
		CITY:			BROOMFIELD
		STATE:			CO
		ZIP:			80021
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-05-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001425565</issuerCik>
        <issuerName>Real Goods Solar, Inc.</issuerName>
        <issuerTradingSymbol>RSOL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001454923</rptOwnerCik>
            <rptOwnerName>Lehman Scott B.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>833 WEST SOUTH BOULDER ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOUISVILLE</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80027-2452</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-05-12</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16499</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares vest 50% on May 12, 2011 and 50% on May 12, 2012.</footnote>
        <footnote id="F2">Shares granted in consideration of director services.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Thomas R. Stephens
Attorney-In-Fact for Scott Lehman</signatureName>
        <signatureDate>2010-05-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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