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9.5p
Octopus Go
overnight rate
overnight rate
Octopus Go
daytime rate ()
daytime rate ()
Saved per kWh
on stored energy
on stored energy
Best-case annual saving
(5 kWh battery)
(5 kWh battery)
The calculation (Octopus Go rates for , checked 10 October 2026)
All UK regions
On Octopus Go 12M Fixed (GO-FIX-12M-26-09-29, checked 10 October 2026), the overnight rate is 9.5p everywhere. Daytime rates run from 33.555p (Yorkshire) to 37.4209p (North Wales & Merseyside). Best-case yearly savings on a 5 kWh battery, with one full cycle a day and an assumed 90% round-trip efficiency, are up to about £420 to £490. Best-case payback on £2,499 is about 5.1 to 6.0 years. Real savings will be lower. See how we worked it out.
| Region | Go daytime rate | Spread | Best-case annual saving (5 kWh) |
|---|---|---|---|
| Yorkshire | 33.555p | 24.1p | £420 |
| West Midlands | 33.8931p | 24.4p | £426 |
| East Midlands | 34.1724p | 24.7p | £431 |
| Northern England | 34.2164p | 24.7p | £432 |
| London | 34.481p | 25.0p | £437 |
| Southern Scotland | 34.9661p | 25.5p | £445 |
| Southern England | 35.5099p | 26.0p | £455 |
| North West England | 35.5393p | 26.0p | £456 |
| South Wales | 35.657p | 26.2p | £458 |
| Eastern England | 36.0832p | 26.6p | £466 |
| South West England | 36.1715p | 26.7p | £467 |
| Northern Scotland | 36.245p | 26.7p | £469 |
| South East England | 36.2891p | 26.8p | £470 |
| North Wales & Merseyside | 37.4209p | 27.9p | £490 |
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