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How to install a charging station for an electric vehicle?

You will need a professional electrician to install your EV charger for your safety. As well, the EV charging station may lose it's warranty in case if it was not installed by a certified electrician.

However we will provide you some tips, if you're a professional electrician to help you along the way.

1- Checking Available Power

It is important to check the total power of your electrical installation, and to deduce the maximum power consumption during peak consumption. You will then get the available power that will power your terminal. This step is important because the charging point will surely be the element that will consume the most in your home: a charging point of 11kW is equivalent to 11 small electric heaters. If the power is insufficient, it will be necessary to ask your energy supplier an increase of this one.

Example of calculation of available power:

  • Single Phase Installation: Look at the amperage of your main breaker, and multiply it by 230V. Ex: 40A x 230V = 9.2kW. Then deduce from this total the max power you consume in instantaneous. Ex: 3 electric radiators of 1kW, 1 microwave oven 1kW, 1 washing machine1kW, (lighting is negligible). So you have about 4kW left for your terminal.
  • Three Phase Installation: Look at the amperage of your main breaker, and multiply it by 690 (3x230) V. Ex: 17A x 690V = 11.7kW. Then deduce from this total the max power you consume in instantaneous. Ex: 3 electric heaters of 1kW, 1 microwave oven 1kW, 1 washing machine 1kW (lighting is negligible). So you have about 7kW left for your terminal.

2- Dedicated Line and Mandatory Electrical Protections

A charging station must be installed on a dedicated line, with its own breaker coupled with its own differential switch . A release with current release is additional security not required, but allows you to obtain ZE Ready certification. Below are the specifications of these elements to be in good standing:

  • Three-phase installation:
    • Differential Switches : Type B, 30mA, 4P, 40A Max (One Type A is Enough , instead of type B, if the charging station is equipped with a DC leakage current detector, this is the case for charging stations KEBA and ALFEN )
    • Breaker : Min. C curve, 3kA min., 2P or 1P + N cutoff, 16 to 40A (choose 3 to 8A in addition to the rated current of the charging station)
    • Current-Release Triggers : No special specifications

To make it easier for you to choose electrical protections, Carplug already offers packs compatible charging stations and protections .

Below is an illustration of connection in both situations, in the case of a charging point HAGER Witty 2-22kW (source HAGER).

Section of connecting cables, according to French standards NF C15-100 and NF C15-722:

  • Charging station 16A or plug16A, less than 100m: cable section 2.5mm²
  • Charging station 32A, less than 100m: cable section 10mm²
Section-diametre-de-cable-electrique-borne-de-recharge
terminal-schema-de -electrical-connection-by-HAGER

More information is available here:

How to use my Charing station?