Electric Car Charging Cost in the UK: Home vs Rapid Charging

Estimating your annual charging budget

Start with an annual ballpark: it mostly depends on your mileage and how much of your charging is cheap, slow, off-peak charging versus rapid/ultra-rapid charging.

The more your habits lean on rapid or ultra-rapid charging, the higher your energy budget climbs. The sections below break down the two variables behind these swings: consumption and the price per kWh.

Where it starts: consumption

To sharpen this budget, start from a realistic consumption figure rather than the WLTP combined number alone — WLTP is useful for comparing two models, but it often understates real-world cost on a motorway run or in cold weather.

The motorway is the most sensitive case: at the 70mph limit, the consumption gap between two models can reach 20% or more. Since rapid/ultra-rapid charging costs more than charging at home, a long motorway trip can easily create a £15–40 difference on the electricity bill alone. A more efficient model also cuts the time spent at rapid chargers, especially when the charger's real output power is limited.

Land's End to John o'Groats by EV: how many kWh?

For a local example, use the RAC's own routing of 837 miles via the A30, M5, M6, A74(M), M74, M73, M80, M9, A9, and A99 — the classic British end-to-end drive, at roughly 14 hours 30 minutes of driving time. See the RAC's Land's End to John o'Groats route for the full turn-by-turn breakdown; other route choices give slightly different totals.

The formula is 837 × consumption ÷ 100. In the average-EV scenario, moving from 60 to 70 mph adds about 42 kWh one way. At 70 mph, the gap between the efficient and high-consumption cases reaches 92 kWh. Double the figures for a round trip (1,674 miles), and always follow the posted speed limit — the A9's Perth–Inverness stretch is a 60mph single carriageway, not the 70mph you'll have run on most of the M-road legs further south.

What you pay per kWh, by charging location

The math is simple: cost per 100 mi = consumption × price per kWh. The last column then translates that cost into the MPG a petrol car would need to match it, assuming petrol at £1.5/litre.

For comparison, a petrol car averaging 43 MPG costs about £15.7 per 100 mi. Home charging stays clearly cheaper; leaning heavily on motorway ultra-rapid charging brings an EV close to that same cost.

The extra costs people forget

At home, installing a 7kW charger typically runs £800–£1,200 including installation — more if you need a consumer-unit or supply upgrade. The old EV Homecharge Scheme (EVHS) grant for homeowners with off-street parking closed in 2022; a narrower grant now covers renters and flat/leaseholders in some cases, plus a separate Workplace Charging Scheme for employers. Check current eligibility before assuming any grant applies to your own installation.