| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 1292967 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1120165 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 2886107 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 4648380 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | GRID ALTERNATIVES' MISSION IS TO PROVIDE ENERGY COST SAVINGS TO LOW-INCOME HOMEOWNERS THROUGH INSTALLATION OF SOLAR ELECTRIC SYSTEMS AND TRAINING IN ENERGY EFFICIENCY, WHILE PROVIDING HANDS-ON SOLAR INSTALLATION OPPORTUNITIES TO JOB TRAINING ORGANIZATIONS AND COMMUNITY VOLUNTEERS. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 44168 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 33643 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 128819 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 206630 |
| IRS990/AllOtherContributionsAmt | 0 | 10794982 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | TIM SEARS |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5107311313 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1171 OCEAN AVENUE SUITE 200 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | OAKLAND |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94608 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1587419 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 2856292 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 20 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 510910 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 510910 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 3989 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 23852 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 305288 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 333129 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 1 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 3747075 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 3623321 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 1060972 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 933894 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 403948 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 100 CENTURY CENTER CT SUITE 501 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 595 MARKET ST 29TH FLOOR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 600 HIGHWAY 169 SOUTH STE 1425 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 1420 N MCDOWELL BLVD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | 1730 CAMINO CARLOS REY STE 201 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | SAN JOSE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | SAN FRANCISCO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | ST LOUIS PARK |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | PETALUMA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | SANTA FE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | MN |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | NM |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 95112 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 94105 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 55426 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 95763 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 87507 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | TRINA SOLAR (US) INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | SUNRUN INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | SPRUCE FINANCE INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | ENPHASE ENERGY INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | BAYWA RE SOLAR SYSTEMS LLC |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | SUBCONTRACTOR - CONSULTANT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | SUBCONTRACTOR - CONSULTANT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | SUBCONTRACTOR - CONSULTANT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | EQUIPMENT SUPPLIER |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | EQUIPMENT SUPPLIER |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 16943862 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 275195 |
| IRS990/CYOtherExpensesAmt | 0 | 16016445 |
| IRS990/CYOtherRevenueAmt | 0 | 27180 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 13196428 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 3495638 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 10930582 |
| IRS990/CYTotalExpensesAmt | 0 | 26947027 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 2026849 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 30442665 |
| IRS990/DAFExcessBusinessHoldingsInd | 0 | 0 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 616396 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 3961368 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 22503 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 33863 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 99338 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 155704 |
| IRS990/Desc | 0 | PROVIDED ALTERNATIVE RENEWABLE ENERGY FOR LOW-INCOME RESIDENTS THROUGH CONSULTATION AND INSTALLATION OF RENEWABLE SOLAR ELECTRICAL SYSTEMS. IN-KIND SERVICES DONATED TO THE ORGANIZATION IN 2017 INCLUDED LEGAL COUNSEL (PRIMARILY AROUND AFFILIATION, HUMAN RESOURCES, AND PROJECT FINANCING) AND SKILLED SOLAR INSTALLATION ASSISTANCE THROUGH GRID ALTERNATIVE'S VOLUNTEER TEAM LEADER PROGRAM. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 206 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 20980726 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 1 |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 15260 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 68826 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 86809 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 170895 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 448 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 2020 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 2547 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 5015 |
| IRS990/FeesForServicesManagementGrp/FundraisingAmt | 0 | 138161 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 2606344 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 2744505 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 5058 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 2558 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 2787317 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 2794933 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 1 |
| IRS990/Form1098CFiledInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form8899Filedind | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 32.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 762 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 11534 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 7092 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 6668 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 8085 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 730 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 8794 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 6402 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | JOSEPH KARP PAST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | KAREN EDSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MARY WENZEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | BEN TARBELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | MARA FEENEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | BILL KISSINGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | VIVIAN RICHARDSON PAST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | GREG ALIFF |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | RON BINZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | MARK ANDREWS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | PHYLLIS CURRIE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | BRAD SPARKS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | ROBERT ROBINSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | ORSON AGUILAR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | ERICA MACKIE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | TIM SEARS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | PETER KODZIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | STANLEY GRESCHNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | ANNAMARIE CALOMAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | JULIAN FOLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | JEFFREY COLEMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | RENEE SHARP |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 154352 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 182834 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 154336 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 152500 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 140000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 111750 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 142723 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 123400 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | EMPLOYEE-CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | EMPLOYEE-COO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | CFO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | EMPLOYEE-GOVERNMENT RELATIONS & MKT DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | VP CONSTRUCTION AND WORKFORCE DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | EMPLOYEE-VP OF COMMUNICATION |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | EMPLOYEE-VP OF OUTREACH |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | EMPLOYEE-BAY AREA REGIONAL DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2002 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 12 |
| IRS990/GovernmentGrantsAmt | 0 | 6148880 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 30442665 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 27180 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 12 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 12 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 891 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 451 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 491235 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 492577 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 522 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 17729 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 141286 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 159537 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 121992 |
| IRS990/InterestGrp/TotalAmt | 0 | 121992 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 275195 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 275195 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 15947 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 15947 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 1068979 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 1348666 |
| IRS990/IRPDocumentCnt | 0 | 241 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 244811 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 245872 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 173843 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 418654 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 1 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | GRID ALTERNATIVES' MISSION IS TO PROVIDE ENERGY COST SAVINGS TO LOW-INCOME HOMEOWNERS THROUGH INSTALLATION OF SOLAR ELECTRIC SYSTEMS AND TRAINING IN ENERGY EFFICIENCY, WHILE PROVIDING HANDS-ON SOLAR INSTALLATION OPPORTUNITIES TO JOB TRAINING ORGANIZATIONS AND COMMUNITY VOLUNTEERS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 1000000 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 1000000 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 9906183 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 13401821 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 27180 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 27180 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoncashContributionsAmt | 0 | 1793415 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 78178 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 91756 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 342107 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 512041 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 55633 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 180922 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 245324 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 481879 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 1122734 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 3050990 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 148582 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 271979 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 906022 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 1326583 |
| IRS990/OtherExpensesGrp/Desc | 0 | PROGRAM SUPPLIES & EXPE |
| IRS990/OtherExpensesGrp/Desc | 1 | IN-KIND EXPENDITURES |
| IRS990/OtherExpensesGrp/Desc | 2 | BUSINESS TAX |
| IRS990/OtherExpensesGrp/Desc | 3 | STAFF DEVELOPMENT |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 9312 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 6632 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4709 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 5353 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 8348 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 5130988 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 1709903 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 188235 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 73138 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 5145009 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 1709903 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 193588 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 88118 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 10901500 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 8233153 |