Last updated: September 2026

EV Charging Costs Explained: Home vs Public

Ask five EV drivers what charging costs and you will get five different answers — anywhere from 20 cents to 80 cents per kWh. Both can be true. The price of a kilowatt-hour depends far more on where you charge than on how much electricity the grid itself costs. This guide breaks down home vs public charging, gives you the cost-per-100km formula, and shows what really drives the price.

The only formula that matters

To compare an EV with a petrol car, convert everything to cost per 100 km:

Cost per 100 km = price per kWh × consumption (kWh/100 km) ÷ charging efficiency

A typical family EV consumes 15–18 kWh per 100 km in mixed driving (smaller cars 13–15, large SUVs 19–22). Charging is not perfectly efficient — AC home charging loses about 8–12% in the onboard charger and battery, so you actually pay for roughly 1.1 kWh from the wall per 1 kWh added to the battery. DC fast charging is a bit more efficient, around 5% loss. Skip this correction and your estimates will be optimistic.

Home charging: the cheapest kWh you will buy

Charging at home means paying your domestic electricity tariff — the same price as running your washing machine. Typical all-in residential rates (energy + grid + taxes, September 2026) look like this:

Spain: €0.15–0.25/kWh (night tariffs can drop below €0.10)
Portugal: €0.16–0.23/kWh
France: €0.20–0.26/kWh (regulated EDF tariffs)
Germany: €0.28–0.38/kWh (among Europe's highest)

Take a car consuming 16 kWh/100 km, charged at €0.25/kWh with 90% efficiency: 16 × 0.25 ÷ 0.9 = €4.44 per 100 km. A comparable petrol car using 6.5 L/100 km at €1.70/L costs €11.05 per 100 km — less than half the fuel cost, before you even count maintenance. If you have rooftop solar, daytime charging can push your marginal cost toward zero.

Home charging does have one upfront cost: a wallbox (€500–1,500 installed), though many EVs include a portable cable that works from a standard socket at 2.3 kW for overnight top-ups. Check whether your country subsidises chargers — several EU states still offer grants or tax deductions for home charging equipment.

Public charging: convenient but 2–4× the price

Public chargers are a business, and their prices reflect hardware costs, grid fees, roaming margins and profit. Rough 2026 ranges in Western Europe:

AC street chargers (11–22 kW): €0.30–0.55/kWh
DC fast charging (50–150 kW): €0.45–0.65/kWh
Ultra-fast hubs (150–350 kW): €0.50–0.80/kWh without subscription

At €0.60/kWh the same 16 kWh/100 km car costs €10.70 per 100 km — barely cheaper than petrol. This is the single most misunderstood fact in EV economics: the savings live at home. An EV charged exclusively at fast chargers is an expensive car to run.

What drives the price of a public kWh

Ad-hoc vs subscription pricing. Networks like Ionity or Tesla charge premium pay-as-you-go rates (often €0.70–0.79/kWh), with 30–50% discounts for monthly subscribers. One long trip can justify a one-month subscription.
Roaming margins. Paying with a third-party card (your eMSP) at someone else's charger (the CPO) adds a roaming fee — sometimes €0.10–0.20/kWh. Using the operator's own app is usually cheaper.
Session and idle fees. Some chargers add a flat session fee (€0.50–1.50) and idle fees (€0.10–0.50/min) if you stay plugged in after charging stops. On a short top-up, a €1 session fee on 10 kWh adds €0.10/kWh alone.
Time-of-day pricing. A growing number of operators charge less overnight. If your road trip allows it, a 22:00 charge can be meaningfully cheaper than 18:00.
VAT differences. Public charging VAT ranges from about 19% to 27% across the EU, and it is baked into the sticker price — one reason German fast chargers look expensive next to French ones.

Worked example: a 15,000 km/year commuter

Assume 16 kWh/100 km, 90% AC efficiency, and these splits:

90% home charging at €0.24/kWh: 15,000 × 0.9 × 16 ÷ 100 × 0.24 ÷ 0.9 = €576/year, plus 10% fast charging at €0.55/kWh (95% efficiency) = €139/year. Total ≈ €715/year.
100% public DC at €0.60/kWh: 15,000 × 16 ÷ 100 × 0.60 ÷ 0.95 = €1,516/year.
Comparable petrol car (6.5 L/100 km at €1.70/L): €1,658/year.

The home charger saves over €900 a year versus petrol — the public-only driver saves barely anything. Your charging mix matters more than your car choice.

Frequently asked questions

Is it cheaper to charge an EV at home or at public chargers?

Home charging is almost always far cheaper — typically €0.15–0.38/kWh versus €0.30–0.80/kWh at public chargers in Europe. The savings of an EV come mostly from home (or workplace) charging.

How do I calculate my EV's cost per 100 km?

Multiply your price per kWh by your car's consumption in kWh/100 km, then divide by charging efficiency (about 0.9 for home AC charging). Example: €0.25 × 16 ÷ 0.9 ≈ €4.44 per 100 km.

Why do fast chargers cost so much more than home electricity?

Public chargers must recover expensive hardware, grid connection fees, land rent, roaming margins and profit, plus VAT — while your home tariff is just the domestic electricity price. Subscription plans can cut ad-hoc fast-charging prices by 30–50%.

Can an EV be more expensive to run than a petrol car?

On fuel alone, an EV charged exclusively at expensive ultra-fast chargers (€0.70–0.80/kWh) can cost nearly as much per 100 km as an efficient petrol car. With home charging, the EV wins by a wide margin — which is why your charging mix matters.

Does rooftop solar really make EV charging free?

Not literally free — the solar system cost something — but the marginal cost of a daytime kWh can be near zero, and it shields you from electricity price rises. Many households size their solar partly around the car's consumption.

Run your own mix with our EV charging vs petrol calculator — plug in your home tariff, your public charging share and your car's consumption to see your true cost per 100 km.

This guide is for information only and is not professional financial advice.