HOme ev chargers from £899

1. To get our So EV tariff, simply switch to our standard variable tariff, So Flex – once you're on supply, your account will be set up (this usually takes 7 days), and we'll email you to let you know you can switch to So EV. If you're already on a fixed-rate tariff with us, we won't charge you any early exit fees.

2. The 1.4p per mile calculation is based on the Tesla Model Y, which has an EV efficiency of 220 kWh per mile (or 0.22 kWh per mile). Multiplying 0.22 by So EV's off-peak rate of 6.5p per kWh (between the hours of midnight and 5am) results in the cost of 1.43p per mile (which we round down to 1.4p per mile). We use theTesla Model Y because it was the UK's best-selling car in 2025.

3. The 700 miles for £10 calculation is based on a Tesla Model Y efficiency rating of 4.5 miles per kWh. Actual efficiency varies depending on EV make and model, seasonal conditions, driving style, and charging rate. Our estimate uses the So EV charging rate of 6.5p per kWh, offered between 12am and 5am. The precise calculation is 701 miles for £10.12, but we've rounded down the numbers for simplicity.

4. A public ultra-rapid charger costs EV drivers, on average, £0.78 per kWh. So Energy’s off-peak tariff rate is 6.5p per kWh. Our calculations (1-6.5/78 = 0.916, or 92%) show that you’ll save 92% versus public charging when combining your charger with our EV tariff.

5. The 76% savings claim vs charging on a standard variable tariff is based on our So Flex electricity unit rate of £0.268 per kW vs the So EV electricity unit rate of £0.065 per kW.