EV home charging cost calculator UK

Estimate annual home-charging energy, blended electricity cost and cost per mile from your mileage, vehicle efficiency, charging losses and tariff mix.

WHAT THIS CALCULATOR TELLS YOU

EV charging cost depends on how much energy the car needs and what you pay when you charge it. A time-of-use tariff can change the result substantially if a high proportion of charging is genuinely moved off-peak.

Method reviewed: September 2026Assumptions are visibleIllustration, not a quotation

Outputs are simplified illustrations using the values you enter. They are not a prediction or guarantee of generation, savings, battery performance, charging cost or investment return.

HOW THE CALCULATION WORKS

Transparent methodology

Vehicle energy

Annual miles ÷ entered miles per kWh.

Grid energy

Vehicle energy adjusted for your charging-loss assumption.

Charging cost

Grid energy × a blended rate based on your standard/off-peak tariffs and off-peak share.

HOW TO INTERPRET IT

Use the result as a scenario.

Two drivers covering the same mileage can have different annual charging costs because vehicle efficiency, weather, charging losses and the proportion charged at off-peak rates differ.

For a real project, replace planning assumptions with site-specific design data, current tariffs, actual equipment specifications and a formal quotation.

CALCULATOR QUESTIONS

What the tool can — and cannot — tell you

Why include charging losses?

Not every kWh drawn from the grid reaches the battery. The loss varies by vehicle, charger, conditions and charging behaviour.

Does this include public charging?

No. This tool focuses on home charging so the tariff assumptions stay transparent.

Can solar reduce EV charging cost?

Potentially, where charging can align with surplus generation. The amount depends on the solar system, vehicle availability and charging controls.