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

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001369605</cik>
        <entityName>Calisolar Inc.</entityName>
        <issuerAddress>
            <street1>985 ALMANOR AVENUE</street1>
            <city>SUNNYVALE</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>94085</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>408-962-3100</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2006</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Roy</firstName>
                <lastName>Johnson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kamel</firstName>
                <lastName>Ounadjela</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <lastName>Ware</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 24th St., NW, Suite 250</street1>
                <city>Washington</city>
                <stateOrCountry>DC</stateOrCountry>
                <zipCode>20037</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <lastName>Wiberg</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ullas</firstName>
                <lastName>Naik</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <lastName>Berkowitz</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Craig</firstName>
                <lastName>Cornelius</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Daniel</firstName>
                <lastName>Gross</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Hudson Calisolar Holdings, LLC</street1>
                <street2>400 Frank W. Burr Boulevard, Suite 37</street2>
                <city>Teaneck</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07666</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <lastName>Beaver</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>985 Almanor Avenue</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94085</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Energy Conservation</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-02-04</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOptionToAcquireType>true</isOptionToAcquireType>
            <isSecurityToBeAcquiredType>true</isSecurityToBeAcquiredType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>true</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>UBS Securities LLC</recipientName>
                <recipientCRDNumber>7654</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>677 Washington Blvd.</street1>
                    <city>Stamford</city>
                    <stateOrCountry>CT</stateOrCountry>
                    <zipCode>06901</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>CA</state>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>34207997</totalOfferingAmount>
            <totalAmountSold>34207997</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>12</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>2540000</dollarAmount>
                <isEstimate>true</isEstimate>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Calisolar Inc.</issuerName>
                <signatureName>John R. Beaver</signatureName>
                <nameOfSigner>John R. Beaver</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2010-02-16</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
