The cap is what you pay if you've never switched. It is the wrong tariff for an EV: every kWh into the car costs the full daytime rate.
Assumes home charging with 90% of it in the window (100% for flat tariffs). Not sure of your efficiency? Pick your car from the car list.
Will your car fill up in the window? A 7 kW charger delivers about 6.3 kWh an hour into the battery. There is no window to worry about.
| Car | mi/kWh | Per month | On the cap | Saving / yr |
|---|
| Tariff | Off-peak | Peak | Window | Per month* |
|---|---|---|---|---|
| Utility Warehouse EV | 6.9p | 27.16p | 5 h | £18.89 |
| EDF GoElectric | 6.99p | 30.0p | 7 h | £19.66 |
| Intelligent Octopus Go | 8.0p | 27.0p | 6 h | £21 |
| Octopus Go | 8.5p | 27.0p | 5 h | £22 |
| E.ON Next Drive Smart | 8.5p | 30.87p | 6 h | £23 |
| British Gas EV Power | 9.0p | 27.5p | 5 h | £23 |
| OVO Charge Anytime | 14.0p | — | 24 h | £30 |
| Standard price cap | 26.32p | — | 0 h | £56 |
*8,000 miles a year, 3.5 mi/kWh, home charging. Standing charges excluded. Rates checked 29 September 2026.
26.32p per kWh, at any time of day for the car. Rates checked 29 September 2026.
Everyone — it's the default tariff.
None.
An 8,000-mile driver in a typical 3.5 mi/kWh EV, charging at home, pays about £56 a month for charging on Standard price cap against £56 on the price cap — around £0.00 a year. The rest of the house pays the same flat rate.
Not financial advice. Prices and conditions change; confirm with Ofgem cap (any supplier) before switching. Use the calculator to include public charging and your petrol comparison.