Calculator
Get your solar and battery numbers before anyone quotes.
A quick screening estimate for year-1 bill savings, modelled battery earnings and a 10-year ledger. Real quotes still follow a survey.
Worked example
Medium home, south-facing roof, 4 kWp panels and 10 kWh battery.
JavaScript is off, so here is the static worked example generated from the calculator constants.
Year-1 bill saving
£884
Battery earnings model
£120-250/yr
Year-1 total benefit
£1,004-1,134
| Year | Bill saving | Benefit range |
|---|---|---|
| 1 | £884 | £1,004-1,134 |
| 2 | £905 | £1,025-1,155 |
| 3 | £928 | £1,048-1,178 |
| 4 | £951 | £1,071-1,201 |
| 5 | £974 | £1,094-1,224 |
| 6 | £999 | £1,119-1,249 |
| 7 | £1,023 | £1,143-1,273 |
| 8 | £1,049 | £1,169-1,299 |
| 9 | £1,074 | £1,194-1,324 |
| 10 | £1,101 | £1,221-1,351 |
| 10-year total | £11,088-12,388 |