Solar payback calculator
Free, no-obligation quote
Calculator result useful? Now test it against a quote.
Use your assumptions as a starting point, then ask OVO how their quote estimates generation, self-use and battery impact.
- No pressure from Here4Solar
- Personalised home quote
- Check if solar could work
Takes about a minute to start. OVO handles quote details and suitability checks.
A calculator is a model, not a promise. Use it to understand which assumptions matter before you compare real solar quotes.
How to use the calculator
Start with your household profile, then adjust system size, installed cost, roof direction, shading, self-consumption, import price and export rate. Small changes can move the payback result a lot.
Inputs
Start with a household profile, then adjust the detailed assumptions. Use pence per kWh for tariff inputs.
Ofgem medium-use household. Postcode lookup uses Postcodes.io and PVGIS via this site; Here4Solar caches only the resulting yield, not the postcode.
Typical usage presets use Ofgem low, medium and high household electricity values. Roof direction and shading adjust the generation estimate unless a PVGIS postcode yield is applied.
Estimate
Benefit combines avoided imported electricity, export payments and the annual allowance you entered. It does not price finance, roof works, future tariff changes, inverter replacement timing or battery replacement.
How to read the result
If payback only works with very optimistic self-consumption or export assumptions, treat that as a warning. If the result looks close, ask a provider to explain how their quote estimates generation and savings.
Useful sources: Ofgem SEG, GOV.UK VAT relief.