Work out ev vs petrol cost instantly with clear inputs, formula shown and shareable results.
EV energy cost is consumption times electricity price, and the comparison hinges entirely on the tariff: home overnight rates can be a fifth of public rapid charging prices. At 17 kWh/100km and a 28p tariff the EV costs about 4.76 per 100 km against 11.50 for petrol.
EV versus petrol
EV cost per 100 km = kWh/100km x electricity price; compare with fuel cost per 100 km
Substantially. At 70-80p per kWh a rapid charger costs more per kilometre than petrol in an efficient car, so home charging is what makes the economics work.
Add higher purchase price and insurance against lower servicing and tax. Over five years the balance depends heavily on annual mileage.