EV vs petrol cost calculator for Guernsey
Is an EV cheaper to run than petrol in Guernsey? Pick a Guernsey Electricity tariff and your cars, then change anything. You'll see the yearly energy cost of each, in pounds.
An EV saves you
—
per year on energy
Yearly energy cost
| Cost per 100 miles (Electric) | — |
| Cost per 100 miles (Petrol/diesel car) | — |
| Electricity used (kWh a year) | — |
| Average price paid per kWh | — |
| Break-even price per kWh | — |
What your result means: the big number is how much you'd save (or spend extra) a year on energy by driving electric. The break-even price is the most you could pay per kWh before the EV stops being cheaper to run. This is energy only, so purchase price and other running costs aren't counted.
Energy only. Standing charges, purchase price, insurance, duty and maintenance are not included. Estimates, not financial advice.
Where the numbers come from
- Guernsey Electricity: electricity prices and 1 July 2026 tariff table (PDF), checked 24 Oct 2026.
- Plug-N-Go: Guernsey pricing and States of Guernsey: sustainable transport, checked 24 Oct 2026.
- Fuel: GSY Fuel Prices (gsyfuel.co.uk), community-reported forecourt prices, checked 24 Oct 2026 (island average of 22 forecourts, prices updated 22 Oct 2026: unleaded 186.6p, diesel 200.1p a litre). Secondary reference: ATF Guernsey forecourt prices (one retailer, 15 Oct 2026). The States of Guernsey do not publish an official island average.
- Fuel duty, First Registration Duty and planned changes: gov.gg motoring fees and gov.gg transport taxes, checked 24 Oct 2026.