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7p
Octopus Go
overnight rate
overnight rate
29p
Octopus Go
daytime rate
daytime rate
22p
Saved per kWh
on stored energy
on stored energy
£831
Estimated annual saving
(11.5kWh battery)
(11.5kWh battery)
The calculation (based on Octopus Go rates)
11.5kWh × 90% efficiency = 10.35kWh usable per cycle(29p daytime − 7p overnight) × 10.35kWh = 228p saved per day
228p × 365 days = £831/year
All UK regions
Standard variable tariff rates by region (Ofgem price cap, Q2 2026). The battery saving on Octopus Go is the same everywhere (£831/year) – but the rate you’re switching from varies.
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