Country Solar Insolation Explorer
Explore live solar irradiance and PV output for any country. Click a name to fetch data from NASA POWER (GHI/DNI/DHI) and PVGIS (PVOUT), or view offline fallback estimates if APIs are unreachable. Share URLs include the country code.
POWER: ready
Pick a country
Panel shows annual GHI, DNI, DHI, PVOUT, and a monthly series.
Annual GHI—
Annual DNI—
Annual DHI—
PVOUT (kWh/kWp)—
Band
Sources: NASA POWER (climatology) and PVGIS PVcalc. If direct NASA calls are blocked by CORS on your host, this page automatically retries via a small server proxy. When offline or proxy is missing, PVOUT is estimated from GHI and a notice is shown.
Data sources & attribution
This page combines open datasets and services for educational and planning use. Always verify with local measurements and standards.
- NASA POWER — Climatology of GHI, DNI, and DHI via
/api/temporal/climatology/point. CommunitySB. We multiply daily kWh/m² by month days to show kWh/m²/month; annual totals are the sum of months. - PVGIS (JRC) — PV energy yield (PVOUT) via
/api/v5_3/PVcalc. Called through a small server proxy due to CORS. Defaults here usepeakpower=1,loss=14(%), fixed-tilt. - Fallbacks — If APIs are unreachable, monthly/annual values are estimated from a deterministic offline model and clearly labeled.
Attribution: “Solar/meteorological data from NASA POWER; PV performance from PVGIS (JRC).” For full details and implementation notes, see Insolation Data Sources & API Notes.