# Solar Resource & PV Yield

> Solar Resource & PV Yield is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-30).

Returns long-term monthly solar irradiance, temperature, wind data, and estimated PV system yield/capacity factor for any location on Earth using NASA POWER data (2001–2025).

## Facts

- Endpoint: GET https://bess-x402.onrender.com/v1/energy/solar-resource?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/solar-resource-pv-yield-48ac8589
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oZX-HwrPxpyCCo0AL4yNp

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability solar-resource-pv-yield-48ac8589
```

Example prompt: Can you look up the long-term monthly solar resource and estimated annual PV yield for a 15 kWp system at latitude 36.1, longitude -115.2 (Las Vegas area)?

## When to prefer this

Choose this endpoint when you need long-term climatological solar resource data (20+ year averages) for site screening or feasibility estimation at any global coordinate, especially when you want an integrated PV yield calculation rather than raw irradiance alone. Prefer this over real-time weather APIs when you need stable multi-year averages for investment or planning decisions rather than short-term forecasts.

## Known failure modes

- Missing required lat/lon parameters returns a 400 error
- Coordinates outside valid Earth bounds (-90 to 90 lat, -180 to 180 lon) may return an error or no data
- NASA POWER upstream data unavailability may cause 503 or timeout
- Invalid performance_ratio outside 0.3–1.0 range may return a validation error
- Payment failure (x402) returns 402 Payment Required before data is delivered

## How this service works

Long-term solar irradiance for any location on Earth (NASA POWER, 2001-2025) by month, with temperature, wind and an estimated PV yield, specific yield and capacity factor for a system size. Use to screen solar sites.

## Output

Returns a breakdown by month of solar irradiance (GHI/DNI/DHI), ambient temperature, and wind speed for the given coordinates derived from NASA POWER 2001–2025 climatology, plus computed estimates of total annual PV energy yield (kWh), specific yield (kWh/kWp), and capacity factor for the specified system size and performance ratio.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "lat",
      "lon"
     ],
     "properties": {
      "lat": {
       "type": "number",
       "description": "Latitude"
      },
      "lon": {
       "type": "number",
       "description": "Longitude"
      },
      "system_kw": {
       "type": "number",
       "description": "PV system size in kWp"
      },
      "performance_ratio": {
       "type": "number",
       "description": "System performance ratio 0.3-1 (default 0.8)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/solar-resource-pv-yield-48ac8589/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bess-x402.onrender.com](https://www.zero.xyz/host/bess-x402.onrender.com/llms.txt)