Solar Payback Calculator
Drag the sliders to estimate your annual generation, yearly benefit and how long a solar system would take to pay for itself.
Est. annual generation
3,600 kWh
Annual benefit
£774
Payback time
7.8 yrs
Estimate only — actual output depends on roof, shading and usage.
Get exact quotes
How it works
We assume roughly 900 kWh generated per kWp each year (a common UK figure for a well-oriented roof). The portion you use at home is valued at your electricity price; the rest is valued at your export rate. Payback is your install cost divided by the yearly benefit.