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Guide

How Much Does It Cost to Charge an Electric Car at Home in 2026?

Calculation method, worked example, off-peak hours, charger vs. socket and subsidies: estimate the real cost of charging at home and the levers to bring it down.

11 min read Lire en français
  • QUALIFELEC IRVE-qualified company
  • AXA decennial liability insurance
  • Across France
  • Target: quote within 48 h after a complete brief
  • OCPP supervision
  • ADVENIR grants
  • QUALIFELEC IRVE-qualified company
  • AXA decennial liability insurance
  • Across France
  • Target: quote within 48 h after a complete brief
  • OCPP supervision
  • ADVENIR grants
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In 2026, charging your electric car at home is still the cheapest way to fill up. But between your battery capacity, the price per kWh, off-peak hours and the power of your installation, the « real cost » deserves to be laid out clearly. Here is a simple method to estimate your budget, worked examples shown for guidance only, and the concrete levers to pay less while charging safely.

The calculation method: kWh consumed × price per kWh

Working out the cost of home charging relies on a universal formula that holds true whatever your vehicle:

Cost of a charge = energy consumed (in kWh) × price of electricity (in €/kWh).

Two factors come into play:

  • The energy consumed, expressed in kilowatt-hours (kWh). For a full charge, it roughly matches the usable capacity of your battery. For a top-up, it is simply the number of kWh added.
  • The price per kWh, which depends on your electricity supply contract, your tariff option (flat rate or peak/off-peak hours) and your subscribed power.

Note: you should add a small margin for charging losses (neither the charger nor the battery is 100% efficient), often on the order of 5 to 15% of extra energy billed. For a rough home estimate, you can build these in as a simple safety margin.

A worked example for 100 km (shown for guidance only)

Let's take an illustrative case, with assumptions you will need to adapt to your own situation.

An electric city car consumes on average around 15 kWh per 100 km (a heavier SUV will use more, a small efficient car a little less). These consumption figures are common ballpark values, which you can check on each model's spec sheet.

With a price of about €0.20/kWh (an example value that you must absolutely check against your own contract and the tariff option in force):

  • 100 km ≈ 15 kWh × €0.20 = about €3 per 100 km as an indication.

If you charge instead during off-peak hours, with a lower example tariff (for instance on the order of €0.15/kWh, again to be confirmed against your plan):

  • 100 km ≈ 15 kWh × €0.15 = about €2.25 per 100 km as an indication.

These amounts are only illustrations of the method. Real electricity prices change regularly: always refer to the tariff shown on your contract or your bill to get a reliable figure.

By way of comparison, an equivalent combustion vehicle costs far more in fuel: in the vast majority of cases, home charging remains markedly cheaper per kilometre.

Off-peak or peak hours: a major saving lever

The peak / off-peak hours (HP/HC) option is probably the first saving lever for an EV driver. The principle: during certain time slots (often at night), the kWh is billed at a lower price; in return, it is slightly more expensive for the rest of the day.

Yet a car is generally parked at home overnight. By scheduling charging during off-peak hours, you automatically benefit from the most favourable tariff for most of your charges.

Two conditions to make the most of it:

  • Having signed up for the HP/HC option with your supplier (a trade-off to weigh against your overall consumption profile).
  • Being able to control charging, meaning triggering the charge during the right time slots without daily manual intervention.

This is exactly where a smart-controlled charger makes all the sense: it schedules charging, smooths it out and aligns it with your off-peak hours, whereas a simple socket forces you to plug and unplug manually at the right moment.

Charging station or domestic socket: cost, safety and speed

Many drivers start by plugging their vehicle into a standard domestic socket. It is possible, but it is neither the fastest nor the safest solution.

Charging speed

A standard domestic socket delivers deliberately limited power (on the order of 2.3 kW), which translates into very long charging times — often a whole night, or even longer, to recover a significant range.

A charging station (Wallbox) typically goes up to 7.4 kW single-phase, or even 11 or 22 kW three-phase depending on your installation. The result: a noticeably faster charge, suited to everyday use.

Safety

This is the most important point. A domestic socket is not designed to deliver a high current for long consecutive hours. This prolonged use can cause the circuit to overheat and, in the worst case, a fire risk if the installation is old or unsuitable.

A charger installed by the book includes dedicated electrical protections (a suitable circuit breaker, residual-current protection, verified earthing) and a dedicated line. That is why installing a charger must be entrusted to a qualified professional.

A properly installed charger means a faster charge, consumption you can schedule on off-peak hours, and above all electrical safety that a domestic socket cannot guarantee.

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Home charging vs. public or rapid charging

Comparing the cost of charging at home with that of charging away from home is revealing.

  • At home, you pay for electricity at your own contract's tariff. This is generally the cheapest option per kWh.
  • At a public charger using alternating current (AC), the price per kWh is often higher than at home, sometimes with an added cost tied to parking time.
  • At a rapid charger using direct current (DC), very handy on the motorway to save time, the price per kWh is typically well above that at home.

The logic is clear: public rapid charging is a service for emergencies and long journeys, not an everyday solution. For day-to-day use, charging at home remains the most economical scenario — which is why it pays to invest in a home charger if you can.

The impact of the subscription and the subscribed power

The price per kWh is not the only element on your bill. You also have to factor in the subscription and the subscribed power (expressed in kVA).

Adding a charging station, especially at 7.4 kW or more, increases the power drawn by your home. Depending on your existing installation, it may be necessary to:

  • check that your subscribed power is sufficient to run the charger at the same time as your other appliances;
  • possibly upgrade your subscription, which has an impact on the fixed monthly amount.

Good news: a smart-controlled charger can incorporate dynamic power management (sometimes called « load shedding » or « charge control »). It automatically modulates the power sent to the vehicle to avoid exceeding your installation's capacity, which can spare you a costly subscription increase. This is a point to study case by case when sizing your project.

Solar charging and self-consumption: going further

For homes equipped with photovoltaic panels, there is an additional lever: charging your car with your own solar production.

The principle of self-consumption is to use the electricity you produce as a priority rather than that of the grid. Some chargers can modulate charging according to the available solar surplus: when the sun is producing, the car charges; when production drops, the charge slows down or pauses.

The benefit is twofold: you make the most of your production instead of feeding it back at a low price, and you reduce the marginal cost of your charges. The gain depends heavily on your installation, your consumption and your usage profile: this is a topic to size precisely, ideally with an installer able to integrate the charger and the photovoltaic system coherently.

The subsidies that reduce installation costs

The « total » cost of home charging also includes the installation of the charger. Several schemes can ease the bill. Without quoting amounts — which change and depend on your situation — here are the main ones to know:

  • Only deduct a grant from your budget after the project’s eligibility and payment conditions have been confirmed. ADVENIR does not fund chargers in individual houses. Projects in apartment buildings may qualify; for other uses, check the relevant scheme and confirm eligibility before work begins.
  • The reduced VAT rate: under certain conditions, the supply and installation of a charging station in a home can benefit from a reduced VAT rate of 5.5% instead of the standard rate, which directly lowers the cost of the installation.
  • Possible tax benefits linked to installing a home charging system, depending on the regulations in force.

The eligibility conditions, caps and amounts change regularly: it is essential to check the schemes that apply at the time of your project. A qualified installer will be able to point you towards those you are entitled to and put together the corresponding applications.

How much does it really cost per month? (indicative range)

This is the question everyone asks. The honest answer: it depends on your mileage, your vehicle and your electricity tariff. You can nonetheless reason through the method.

Let's take our example assumptions again (consumption of about 15 kWh/100 km, an example price to check against your contract):

  • For a driver covering around 1,000 km per month, that represents on the order of 150 kWh of traction energy.
  • At off-peak hours on a low example tariff, the monthly budget falls within an indicative range of a few tens of euros — for instance around 150 kWh × €0.15 ≈ €22.50, purely for illustration.
  • At peak hours or with a higher tariff, this budget mechanically rises.

Remember the logic, not the exact figure: multiply your monthly mileage by your car's consumption, then by the real price of your kWh. You'll get a reliable estimate tailored to your situation.

Compared with the cost of fuel for an equivalent journey, the « home charging » budget remains, in most cases, appreciably lower — especially during off-peak hours.

FAQ

Your questions about the cost of home charging

Is it cheaper to charge at home than at a public charger?

In the vast majority of cases, yes. At home, you pay for electricity at your own contract's tariff, generally more favourable than that of public chargers, and markedly lower than that of rapid chargers on the motorway.

Is a standard socket enough to charge?

Technically, you can charge from a domestic socket, but it is slow and above all risky in prolonged use. A dedicated charger, installed by a professional, brings speed, off-peak scheduling and electrical safety.

How do I estimate my monthly charging budget?

Multiply your monthly mileage by your vehicle's consumption (in kWh/100 km), then by the real price of your kWh shown on your contract. Add a small margin for charging losses.

Do subsidies really reduce the cost?

Only deduct a grant from your budget after the project’s eligibility and payment conditions have been confirmed. As the conditions change regularly, have your eligibility checked at the time of your project.

Can I install my charging station myself to save money?

Above 3.7 kW, installing a charger must legally be entrusted to an IRVE-qualified installer: this is the requirement to guarantee compliance with the NF C 15-100 standard, the safety of the circuit and access to subsidies. Only deduct a grant from your budget after the project’s eligibility and payment conditions have been confirmed.

How much does it cost to have a charger installed at home with Volticom?

The price depends on your vehicle, the distance to the electrical panel and the power chosen (7.4, 11 or 22 kW), so it is always set on a quote basis. We price your project free of charge and with no commitment, with a quote within 48 hours after a complete brief, across France that breaks down the charger, the installation and the subsidies you can claim, so you know exactly what to expect.

How long does it take to install the charger and be operational?

In most cases, installing a home charger is done within a timeframe confirmed after the site assessment, by a qualified installer, anywhere in France thanks to our network of partners. After your request, you receive a quote within 48 hours after a complete brief, across France, then we schedule the work according to your availability to get you operational quickly.

Is a charger installed by a professional covered in case of a problem?

Yes: every Volticom installation comes with a decennial liability insurance policy with AXA, subject to the declared activities, limits and terms of the current insurance certificate, for genuine peace of mind. Should an issue arise, our after-sales service stays responsive — something a makeshift domestic-socket setup obviously cannot offer you.

Can a smart-controlled charger really reduce my charging bill?

Yes, that is the whole point of a smart charger: thanks to off-peak scheduling and dynamic power management (load shedding), it automatically aligns your charges with the most favourable tariff without exceeding your subscription. OCPP-compatible, it also allows kWh re-billing, useful if you charge a company vehicle at home.

Do you need a specific circuit breaker to charge safely?

Yes: a charger requires a dedicated line and a 30 mA residual-current protection selected for the charger, its DC detection and the manufacturer’s instructions, compliant with the NF C 15-100 standard, which only an IRVE-qualified installer can implement correctly. This is exactly what we check and size during our free quote within 48 hours, across France, so that your charging is both fast and perfectly safe.

Have your project estimated by Volticom

The surest way to know your real charging cost — and to pay as little as possible — is a well-sized installation: a charger suited to your vehicle, off-peak scheduling, compliant electrical safety and guidance on the available subsidies. Only deduct a grant from your budget after the project’s eligibility and payment conditions have been confirmed. For a personalised, priced estimate, request your free quote within 48 hours, across France: we study your installation, your usage and your subsidy eligibility to optimise the cost of your charging.

Your quote within 48 hours after a complete brief, across France

Free assessment by a QUALIFELEC-qualified IRVE installer, anywhere in France.

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Written by

Maxime Le Bourgeois

Technical Director, IRVE · EV Charging Infrastructure Expert

Maxime oversees the technical aspects and NF C 15-100 compliance of EV charging station installations at Volticom.

Official sources and verification

Sources consulted for this article, in French unless stated otherwise. Regulations and schemes may change: check the version in force before deciding.

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