Best home battery for Octopus Go in 2026
Octopus Go's 5-hour overnight window is the ideal use case for a home battery. The battery you want needs enough usable kWh to cover an evening's demand, plus enough charge rate (kW) to fill in 5 hours. Use the calculator to model the saving for any specific battery.
Frequently asked questions
What size battery for Octopus Go?
Most 4-bed UK homes use 10–14kWh in the evening peak. Match the battery to your evening (4pm–11pm) demand, not your total daily use.
Which batteries charge fast enough on Go?
Anything with at least 3kW charge rate fills 13.5kWh in 5 hours. Tesla Powerwall 3 (11.5kW), GivEnergy AIO (6kW) and Fox ESS EP11 (5kW) all comfortably hit it.
Is the cheaper Pylontech worth it on Go?
Yes if you're cost-conscious — Pylontech US5000 has the lowest £/kWh on the market. You'll need a separate inverter and gateway, so total install is closer to all-in-one prices than the headline battery cost suggests.