Take the data with you
Journalists, researchers and bloggers: use it, cite it. Everything here derives from public-domain and open sources, computed with the model described in our methodology.
U.S. city solar dataset (CSV)
828 cities (every place with 50k+ people, plus the largest city in Vermont and West Virginia) · peak sun hours, best/winter/summer tilt, kWh per kW (best tilt, 25° roof, flat), Dec/Jun ratio, sky clearness, state price and usage, typical system, payback (net metering / net billing), solar ¢/kWh, national percentile. Generated 2026-09-28.
Download CSVLicence: CC BY 4.0 — please credit “Solar Plan Builder (solarplanbuilder.com), using NASA POWER data”.
Coverage
1396 climatology cells covering the 50 states and DC · 51 state price records (EIA, YTD July 2026).
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Sources & licences
| Source | Used for | Licence / terms |
|---|---|---|
| NASA POWER climatology (v2.10) | Monthly irradiance, temperature, wind, albedo, snow; 2001–2020; 1° solar grid | NASA open data — free, attribution requested |
| NLR PVWatts® v8 API | Reference model for validation (NSRDB PSM v3 TMY) | Free API key; results used for validation only |
| U.S. EIA Electric Power Monthly, Table 5.6.B | Residential electricity price by state, year-to-date | U.S. government work — public domain |
| U.S. EIA 2024 Table 5A (EIA-861) | Average monthly residential use and bill by state | Public domain |
| U.S. Census Bureau Gazetteer 2025 + Vintage 2025 estimates | City and ZIP coordinates, population | Public domain |
| U.S. Census Geocoder | Address → coordinates (address-range interpolation) | Public domain, free service |
| OpenStreetMap via OpenFreeMap | Building outlines, street names (vector tiles) | © OpenStreetMap contributors, ODbL; OpenFreeMap free hosting |
| USGS The National Map — NAIP Plus imagery | Aerial imagery for roof views (0.3–1 m) | Public domain (USGS/USDA) |