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Data sources
Published numbers are linked to official sources, reviewed by the Cost Plus Solar team, and removed when stale.
| Source | Method | Refresh SLA | License / restrictions |
|---|---|---|---|
| EIA API v2 monthly residential retail priceU.S. Energy Information Administration | api | 75 days | U.S. government public domain |
| EIA-861 annual utility dataU.S. Energy Information Administration | file | 400 days | U.S. government public domain |
| Energy Trust residential solar incentivesEnergy Trust of Oregon | page_watch | 7 days | Do not automate the contractor search. Extract facts only with a quote span. |
| NREL/NLR PVWatts v8National Renewable Energy Laboratory | api | 730 days | Public federal model with attribution |
| Census ACS 5-yearU.S. Census Bureau | api | 400 days | U.S. government public domain |
| Oregon CCB active licensesOregon Construction Contractors Board | api | 14 days | Internal partner verification only; never published as a directory. |
| Oregon Solar + Storage Rebate statusOregon Department of Energy | page_watch | 7 days | Oregon public information |
| IRS Residential Clean Energy CreditInternal Revenue Service | page_watch | 7 days | U.S. government public domain |
| Tracking the SunLawrence Berkeley National Laboratory | file | 400 days | Public research data with attribution |
| Idaho Power customer generationIdaho Power | page_watch | 30 days | Public utility program information |
| PGE Schedule 7 residential tariffPortland General Electric | page_watch | 14 days | Base tariff is not the effective all-in residential rate. |
| Oregon PUC net metering rulesOregon Public Utility Commission | page_watch | 14 days | Oregon public record |