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NREL Solar Resource Estimates by Lat/Lon
x402
NREL Solar Resource Estimates by Lat/Lon is a paid API for AI agents from 2s.io, paid per call via x402, $0.0012/call, status unknown (last checked 2026-09-14).
Returns annual and monthly solar irradiance averages (DNI, GHI, tilted-at-latitude) for any geographic coordinate, sourced from NREL's NSRDB.
Price / call$0.0012
Success—
StatusUnknown
How this service works
Get average solar resource estimates for any latitude/longitude via NREL. Returns annual + monthly averages for: Direct Normal Irradiance (DNI, kWh/m²/day — solar concentrators), Global Horizontal Irradiance (GHI, kWh/m²/day — flat-plate panels), and Tilted-At-Latitude irradiance (optimal fixed-panel orientation). Sourced from NREL National Solar Radiation Database (NSRDB). Useful for rooftop solar feasibility, off-grid design, and renewable-energy modeling.
Output
Returns annual and monthly averages for Direct Normal Irradiance (DNI, kWh/m²/day), Global Horizontal Irradiance (GHI, kWh/m²/day), and tilted-at-latitude irradiance for the specified coordinates, sourced from NREL's NSRDB.
Example use cases
Example prompt
“What's the solar resource potential at latitude 33.45, longitude -112.07 — I need the annual and monthly DNI, GHI, and tilted irradiance figures for a rooftop solar feasibility study.”
Technical details
Endpoint
GEThttps://2s.io/api/energy/solar-resourceWhen to prefer
Use this endpoint when you need authoritative NREL/NSRDB solar resource data for a specific geographic coordinate — ideal for rooftop solar feasibility, off-grid system design, renewable energy modeling, or site selection where monthly and annual DNI/GHI/tilted irradiance breakdowns are needed.
Side effects
- Missing lat or lon parameters returns a 400 Bad Request
- Coordinates outside valid range (-90 to 90 lat, -180 to 180 lon) return a validation error
- Locations over oceans or polar extremes may have sparse or unavailable NSRDB data
- Payment failure or insufficient USDC balance returns a 402 Payment Required
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lat": 40.7128,
"lon": -74.006
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"ok": true,
"items": [
{
"lat": 40.7128,
"lon": -74.006,
"outputs": {
"tiltedAtLatitudeKWhM2Day": {
"annual": 4.62,
"monthly": {
"apr": 5.05,
"aug": 5.28,
"dec": 3.34,
"feb": 4.45,
"jan": 3.61,
"jul": 5.46,
"jun": 5.31,
"mar": 4.92,
"may": 5.24,
"nov": 3.44,
"oct": 4.26,
"sep": 5.1
}
},
"directNormalIrradianceKWhM2Day": {
"annual": 3.79,
"monthly": {
"apr": 4.1,
"aug": 4.18,
"dec": 2.97,
"feb": 3.89,
"jan": 3.23,
"jul": 4.32,
"jun": 4.23,
"mar": 4.09,
"may": 4.16,
"nov": 2.79,
"oct": 3.42,
"sep": 4.1
}
},
"globalHorizontalIrradianceKWhM2Day": {
"annual": 3.93,
"monthly": {
"apr": 4.77,
"aug": 5.17,
"dec": 1.75,
"feb": 2.89,
"jan": 2,
"jul": 5.85,
"jun": 5.85,
"mar": 3.91,
"may": 5.51,
"nov": 2.08,
"oct": 3.03,
"sep": 4.3
}
}
},
"sources": [
"Perez-SUNY/NREL, 2012"
],
"warnings": []
}
],
"total": 1,
"source": {
"url": "https://developer.nlr.gov/",
"license": "Public domain (US DOE/NREL)",
"provider": "NREL Developer Network (National Renewable Energy Laboratory)"
}
},
"meta": {
"cost": {
"usd": 0.0012,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "energy.solar-resource",
"settlement": {
"txHash": "0x5998a529b700a908c324e85aea67d5710dead14a74d65ca2c3afef78b9377494",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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