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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 6gl9iVZpXLaGAeOB6qRXWw==

<SEC-DOCUMENT>0001096906-07-001422.txt : 20071024
<SEC-HEADER>0001096906-07-001422.hdr.sgml : 20071024
<ACCEPTANCE-DATETIME>20071024163855
ACCESSION NUMBER:		0001096906-07-001422
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071022
FILED AS OF DATE:		20071024
DATE AS OF CHANGE:		20071024

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Solar Power, Inc.
		CENTRAL INDEX KEY:			0001210618
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				204956638
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1115 ORLANDO AVENUE
		CITY:			ROSEVILLE
		STATE:			CA
		ZIP:			95661
		BUSINESS PHONE:		916 745-0900

	MAIL ADDRESS:	
		STREET 1:		1115 ORLANDO AVENUE
		CITY:			ROSEVILLE
		STATE:			CA
		ZIP:			95661

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WELUND FUND INC
		DATE OF NAME CHANGE:	20021216

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Moore Gerald R
		CENTRAL INDEX KEY:			0001382216

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50142
		FILM NUMBER:		071188504

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		916-789-0833

	MAIL ADDRESS:	
		STREET 1:		C/O SOLAR POWER, INC.
		STREET 2:		4080 CAVITT STALLMAN ROAD, SUITE 100
		CITY:			GRANITE BAY
		STATE:			CA
		ZIP:			95746
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-10-22</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001210618</issuerCik>
        <issuerName>Solar Power, Inc.</issuerName>
        <issuerTradingSymbol>(SOPW)</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001382216</rptOwnerCik>
            <rptOwnerName>Moore Gerald R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SOLAR POWER, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1115 ORLANDO AVENUE</rptOwnerStreet2>
            <rptOwnerCity>ROSEVILLE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95661</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.25</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3100000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-12-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Performance Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-12-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Commonc Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>100000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On July 17, 2007, the Reporting Person pledged 1,000,000 shares of Issuer's common stock to obtain a loan (the &quot;Collateral&quot;) in the principal amount of $1,250,000.  Under the terms of the loan, the lender had a right to demand repayment of the loan at anytime by accepting the Collateral in full payment of the principal amount of the loan.  On October 22, 2007, the lender exercised its right of demand and the Reporting Person delivered the Collateral in satisfaction of the principal amount of the loan.</footnote>
        <footnote id="F2">This option vests in four installments, 25,000 on December 28, 2006, 8,333 on December 28, 2007, 8,333 on December 28, 2008 and 8,334 on December 28, 2009.</footnote>
        <footnote id="F3">This option vests based on the Issuer's satisfaction of certain financial performance criteria for each of the calendar years ending December 31, 2007, 2008, 2009 and 2010.  The vesting determination will occur on December 31, 2010.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Gerald R. Moore by Alan Lefko POA</signatureName>
        <signatureDate>2007-10-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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