Calculator
Plug-in solar savings calculator
Enter your postcode and a few details to estimate monthly generation, how much you'd use at home, and an indicative bill saving.
Enter your postcode and system details, then estimate to see your monthly generation, self-consumption and indicative savings.
How this is calculated
We estimate generation from your postcode and system details (using Postcodes.io and PVGIS, with an offline regional fallback), then separate that generation from the part that actually reduces your bill. Only the electricity you use as it is generated (self-consumption) saves money; export income defaults to zero. Results are directional estimates for planning, and nothing you enter is stored.
Read the full calculator methodology, including assumptions and limitations.