Worked examples
Solar + battery vs solar-only examples
Compare 5–30 kWh illustrative battery scenarios. Pages separate solar self-consumption value from tariff shifting and expose the assumptions.
5 kWh battery with solarIllustrative base: £168/yr extra value · 22.3-year simple payback7.5 kWh battery with solarIllustrative base: £252/yr extra value · 17.3-year simple payback10 kWh battery with solarIllustrative base: £337/yr extra value · 14.9-year simple payback12 kWh battery with solarIllustrative base: £404/yr extra value · 13.6-year simple payback15 kWh battery with solarIllustrative base: £505/yr extra value · 12.4-year simple payback20 kWh battery with solarIllustrative base: £673/yr extra value · 11.1-year simple payback25 kWh battery with solarIllustrative base: £842/yr extra value · 10.4-year simple payback30 kWh battery with solarIllustrative base: £1,010/yr extra value · 9.9-year simple payback
Inputs on these pages are illustrative. Replace them with your own tariff, product, quote or household figures in the linked calculator before making a decision.