Worked examples
Home battery payback examples
Compare 3–20 kWh home battery scenarios. Each page exposes installed cost, cycling, efficiency and tariff-spread assumptions rather than promising a fixed payback.
3 kWh home batteryIllustrative base: £3,550 cost · 24.0-year simple payback at 0.75 cycles/day and 20p/kWh spread4 kWh home batteryIllustrative base: £3,900 cost · 19.8-year simple payback at 0.75 cycles/day and 20p/kWh spread5 kWh home batteryIllustrative base: £4,250 cost · 17.3-year simple payback at 0.75 cycles/day and 20p/kWh spread6 kWh home batteryIllustrative base: £4,600 cost · 15.6-year simple payback at 0.75 cycles/day and 20p/kWh spread7.5 kWh home batteryIllustrative base: £5,125 cost · 13.9-year simple payback at 0.75 cycles/day and 20p/kWh spread8 kWh home batteryIllustrative base: £5,300 cost · 13.4-year simple payback at 0.75 cycles/day and 20p/kWh spread10 kWh home batteryIllustrative base: £6,000 cost · 12.2-year simple payback at 0.75 cycles/day and 20p/kWh spread12 kWh home batteryIllustrative base: £6,700 cost · 11.3-year simple payback at 0.75 cycles/day and 20p/kWh spread15 kWh home batteryIllustrative base: £7,750 cost · 10.5-year simple payback at 0.75 cycles/day and 20p/kWh spread20 kWh home batteryIllustrative base: £9,500 cost · 9.6-year simple payback at 0.75 cycles/day and 20p/kWh spread
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.