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Solar savings calculator
Estimate annual electricity value and simple payback using your own generation and tariff assumptions.
Your inputs
Starting values are examples, not recommended rates.
Your estimate
- Estimated annual generation
- 5,840kWh/year
- Annual net electricity value
- 29,704USD
- Simple payback
- 10.1years
A simplified estimate, not a site simulation or guaranteed saving. No subsidy is assumed. Shading, seasonal use, fixed utility charges, degradation, financing and local export rules can materially change the result.
How this tool works
Annual generation = kW × daily peak-sun hours × 365 × performance ratio. Value = self-used energy × import tariff + exported energy × export tariff − annual maintenance.
What should I check before using the result?
A simplified estimate, not a site simulation or guaranteed saving. No subsidy is assumed. Shading, seasonal use, fixed utility charges, degradation, financing and local export rules can materially change the result.
PVWatts prediction limitations