Is this electrical or legal advice?

No. The calculator estimates electricity cost for discussion only. Confirm tariffs, wiring capacity, insurance, and installation with qualified professionals.

Why round the flat fee up?

A whole-currency overnight fee is easier to administer than cents. You can still use exact metered kWh when the group prefers precision.

Do I need a smart charger to use this?

No. Many groups start with an overnight estimate and a flat recovery fee, then move to metered recovery if charging becomes frequent.

Free to use · No signup required · Runs in your browser

Shared Holiday Home EV Charging Cost Calculator

Work out how much electricity an overnight charge may use, what a fair recovery fee looks like at your tariff, and how shared-bill versus flat-fee versus metered rules affect the group over a year.

How to use this tool

Enter the property electricity rate and choose an overnight kWh estimate or a battery charge range.
Add how many charging sessions you expect each year and how many households share the home.
Generate the estimate to compare shared-bill, flat-fee, and metered recovery.
Copy the suggested fee and policy wording into your house rules discussion.

Please note

This estimate is for discussion among co-owners. It is not tax, legal, electrical, insurance, or tariff advice. Actual energy use depends on the vehicle, weather, charger, and circuit.

1. Tariff and fee

Use the delivered electricity rate on the property bill. Currency formatting does not convert exchange rates.

Currency

Electricity rate per kWh

Include supply/usage charges that apply per kWh if you want a fuller recovery rate.

Admin allowance per charge

Optional. Keep this small if used at all.

2. Energy estimate

Match the article approach with a simple overnight kWh estimate, or calculate from battery size and state of charge.

Estimate method

Charging efficiency %

AC charging is often around 85–95%. Used when estimating from battery range, and to show battery energy for overnight estimates.

Overnight wall energy (kWh)

A conservative holiday-home starting point is often 20–40 kWh for an overnight top-up.

Charger level for time estimate

Time is approximate only. Actual power depends on the circuit, cable, and vehicle.

3. Annual usage

Model how often charging happens and how many households share the electricity bill.

Overnight charges per year

Households sharing the home

Households that charge EVs

Used to show the subsidy if EV electricity stays in the shared bill.

Save progress in this browser

Optional and local only. We do not send your tariff or usage figures to analytics.

Cost recovery estimate

Enter the tariff and usage details above, then estimate the charging cost.

Frequently asked questions

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