Point Insolation Lookup

Enter coordinates (lat/lon) to fetch GHI, DNI, DHI (NASA POWER) and PVOUT (PVGIS). Adjust tilt and losses, then share or deep-link with query params.

Inputs

Latitude (°) Longitude (°) Tilt (°) System losses (%) System size (kWp)

Tip: you can paste pairs like 25.05, -77.35 into the latitude field.

Results

POWER returns monthly means in kWh/m²/day; we multiply by month days to show kWh/m²/month and sum to annual totals. PVOUT uses PVGIS with your tilt/loss settings. If PVGIS is unreachable, PVOUT is estimated from GHI (~PR 0.25).

Data sources & attribution

NASA POWER — /api/temporal/monthly/climatology/point for GHI/DNI/DHI.
PVGIS (JRC) — /api/v5_3/PVcalc via proxy for PVOUT.
Fallbacks — When APIs are down, a deterministic offline model supplies clearly-labeled estimates.

Attribution: “Solar/meteorological data from NASA POWER; PV performance from PVGIS (JRC).” See Insolation Data Sources & API Notes.