# California Solar Cost Calculator (californiasolarcostcalculator.com)

Estimates rooftop solar system size and installed cost from a monthly electricity bill, electricity rate, and roof orientation.

- Atlas card: https://inite.ai/en/atlas/californiasolarcostcalculator.com
- Site: https://californiasolarcostcalculator.com
- For: California homeowners estimating solar panel and battery costs before getting installer quotes
- Categories: commerce
- Use not measured/100 · alive 87/100

## Used for

- estimate system size from a monthly electricity bill
- compare panel-only and battery installed costs
- check installer quotes against published per-watt ranges

## Price

- no price printed, no free plan (read 2026-10-20 on https://californiasolarcostcalculator.com/#pricing)

## For developers

- OpenAPI: https://californiasolarcostcalculator.com/openapi.json (6 paths)
- MCP server: com.californiasolarcostcalculator/site (namespace; open on 2026-10-20, 5 tools)
- Read 2026-10-20

## MCP server, measured daily

Server: https://californiasolarcostcalculator.com/mcp, checked every day since 2026-10-20 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 1362 ms
- Sign-in: none
- Context its tool definitions take: about 938 tokens (5 tools)
- Tool definitions: B, 83/100
- Failing "annotations": 5 of 5 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-20

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Source: INITE Atlas, https://inite.ai/en/atlas/californiasolarcostcalculator.com. JSON: https://inite.ai/api/atlas/californiasolarcostcalculator.com. MCP: https://inite.ai/api/mcp (atlas_lookup).