With the rise of electric vehicles and the goal of 100% electric for new vehicles by 2035, many homeowners are asking themselves about installing a home charging station. Between comfort, safety, and consumption optimization, the charging station quickly becomes a central piece of equipment in a modern home. But you still need to understand what it's really for, how it works, and what precautions to take before plugging it into your home network.
Why install a charging station at home?
Recharging your vehicle on a simple domestic outlet is entirely possible, but can prove impractical. The charging speed will indeed be limited both by the capacity of your outlet, the charging cable, and your vehicle's onboard charger.
A charging station (or "wallbox") allows you above all to charge faster and more safely. A standard outlet delivers between 2.3 kW and 3.7 kW per hour depending on its amperage (check your electrical panel). To charge a 50 kWh battery from 0, it would therefore take between 13 and 22 hours. Note that it is extremely rare to need to charge your battery from 0; most of the time, it is recommended to maintain charge between 20 and 80% on Lithium batteries-that is, a charging time to calculate on 60% rather than 100% of charge. In the majority of cases, therefore, a good night's sleep will keep your vehicle always operational!
The charging station acts as an accessory for comfort and safety. It will be able to charge faster, monitor the heating of components, and alert you if there's a problem, etc. If you have solar panels, you can control charging based on production.
How does a charging station work?
Technically, the charging station doesn't send current directly to the battery. It plays the role of an intelligent intermediary between the electrical grid and the vehicle: it manages communication, adjusts charging power, and ensures that conditions are safe before starting the energy transfer.
A home charging station generally consists of:
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A control module (charging management, intensity management, differential protection)
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A charging cable (fixed or removable)
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Built-in safeguards against overvoltage, short circuits, and earth faults
Recent models can also be connected to Wi-Fi or a mobile app to monitor consumption, schedule charging at night or during the day for solar, and adjust power according to current electricity rates.
It's therefore also a rate management tool.
Can I install a charging station at my home and what's its maximum power?
To install a charging station, it is recommended to call an IRVE-qualified electrician (Electric Vehicle Charging Infrastructure). This qualification ensures the professional understands the specifics of charging stations (protections, calibration, vehicle communication).
Ideally, also choose an RGE tradesperson, which can allow you to benefit from certain financial aid or subsidies.
On a home installation, the charging station's power will always be limited by two things:
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Your electricity subscription (the power subscribed from Enedis/EDF, expressed in kVA)
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Your electrical installation characteristics (single-phase or three-phase)
Single-phase or three-phase: what power is possible?
In the majority of households, the installation is single-phase. The most common subscriptions are 3, 6, or 9 kVA, which corresponds to a maximum available power of 3, 6, or 9 kW.
This means that with a 9 kVA subscription, you can draw up to 9 kW simultaneously for your entire home-appliances, heating, lighting... and charging station included.
On a three-phase installation, power is distributed across three phases. A 12 kVA three-phase subscription therefore gives 4 kW per phase, an 18 kVA approximately 6 kW per phase, and a 36 kVA approximately 12 kW per phase.
In practice, this allows a three-phase charging station to deliver 11 to 22 kW, or up to three times faster than single-phase.
Yes, but not so fast Many homeowners think that increasing the charging station's power is enough to charge faster. However, the charging station doesn't impose its power on the vehicle: it's the car's onboard charger that determines the charging speed.
Nearly all electric vehicles have:
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An AC onboard charger (for home charging, slow or normal)
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A fast DC connector (CCS type) used on high-power public charging stations
The AC onboard charger is often limited to 7.4 kW (single-phase) or 11 kW (three-phase).
So even if you install a charging station capable of delivering 22 or 36 kW, your car will only take 11 kW maximum if its internal charger is limited to that power.
In summary
Before considering changing your entire electrical system, you must first check:
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The installation type (single or three-phase)
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Your subscription power
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The maximum AC charging power accepted by your car
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And of course, your electrical panel capacity
Often, a 7.4 kW single-phase charging station is more than enough for daily use: a full night allows you to recover 300 to 400 km of range depending on the vehicle.
Adjusting charging speed: on the station or in the car?
On most vehicles, it's possible to limit charging power directly from the dashboard screen or mobile app. Tesla, for example, allows you to adjust charging speed to the nearest percentage. But modern charging stations also offer similar settings: you can define a maximum power (for example 16A, 20A, 32A) to adapt charging to your electricity meter's capacity.
This dual control (car + station) helps prevent circuit breaks and preserve battery life. In practice, the most suitable charging power will depend on your electrical installation, battery size, and number of devices consuming energy in the home.
A white electric car is being charged at a wall-mounted charging station installed outside a house with a garage.
How much does it cost to install an electric charging station?
You can purchase and install yourself (be careful of risks ⚠️) a WallBox-type charging station for a budget around €280. Remember to get a suitable differential circuit breaker and robust cable section to power it. For installation by a professional, costs will vary between €1,500 and €3,000 depending on installation difficulty.
A tax credit still exists in 2025 of €500 per station and VAT is reduced in case of professional installation.
The Alpaca Immobilier advice
Users of electric vehicles for over 10 years now, we've gotten over the fear of breakdowns! Having an outlet at home or at work that's easily accessible is a must-have that allows you to forget its constraints. Once the habit is formed, it's really no longer an issue because you plug the car in at night just like you charge your phone.
Conclusion
Installing a charging station for your car is definitely an added comfort, especially if it integrates a charging cable directly to avoid having to put it back in your car each time. However, it is NOT essential in the majority of uses, contrary to what some manufacturers would like you to believe!
