-----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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 2avKkOcr3sYBp7RZBF2NTA==

<SEC-DOCUMENT>0001448634-10-000006.txt : 20101102
<SEC-HEADER>0001448634-10-000006.hdr.sgml : 20101102
<ACCEPTANCE-DATETIME>20101102140250
ACCESSION NUMBER:		0001448634-10-000006
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101028
FILED AS OF DATE:		20101102
DATE AS OF CHANGE:		20101102

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McCalmont D. Thompson
		CENTRAL INDEX KEY:			0001448093

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34044
		FILM NUMBER:		101157547

	MAIL ADDRESS:	
		STREET 1:		1624 DELL AVENUE
		CITY:			CAMPBELL
		STATE:			CA
		ZIP:			95008

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McCalmont Darlene J.
		CENTRAL INDEX KEY:			0001448634

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34044
		FILM NUMBER:		101157548

	MAIL ADDRESS:	
		STREET 1:		2959 WINCHESTER BLVD, SUITE 200A
		CITY:			CAMPBELL
		STATE:			CA
		ZIP:			95008

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>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-10-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001448634</rptOwnerCik>
            <rptOwnerName>McCalmont Darlene J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2959 WINCHESTER BLVD, SUITE 200A</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMPBELL</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001448093</rptOwnerCik>
            <rptOwnerName>McCalmont D. Thompson</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2959 WINCHESTER BLVD., SUITE 200A</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMPBELL</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-10-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.19</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1890383</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-10-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.23</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1882283</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">(1)  All shares were issued to either Darlene J. McCalmont, in her name alone, or to the McCalmont Living Trust dated September 3, 2004.  The shares are owned directly by the McCalmont Living Trust dated September 3, 2004, and indirectly by D. Thompson McCalmont and Darlene J. McCalmont as co-trustees and sole beneficiaries of that trust; however, D. Thompson McCalmont expressly disclaims beneficial ownership of such shares.</footnote>
    </footnotes>

    <remarks>/s/ Darlene J. McCalmont and D. Thompson McCalmont, individually and as Co-Trustees of the McCalmont Living Trust dated September 3, 2004</remarks>

    <ownerSignature>
        <signatureName>/s/  Darlene J. McCalmont</signatureName>
        <signatureDate>2010-11-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/  D. Thompson McCalmont</signatureName>
        <signatureDate>2010-11-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----