Installation requirements

Installing an EV home charger is a specialized electrical task that must be performed by a qualified electrician. Because a charger pulls a significant amount of power for many hours at a time, your home’s electrical system must be thoroughly checked to ensure it can handle the load safely.

1. Main Fuse and Load Balancing

The most critical part of the installation is checking your home’s main fuse (usually 60, 80, or 100 Amps). A 7kW charger draws 32 Amps—roughly the same as a powerful electric shower.

  • Load Balancing: Most modern chargers include a “CT clamp” that monitors the total power your house is using. If you turn on your oven, shower, and kettle at the same time, the charger will automatically “throttle back” its power to prevent the main fuse from blowing.
  • Fuse Upgrade: If your main fuse is only 60 Amps, your installer may request an upgrade from your local Distribution Network Operator (DNO).

2. DNO Notification

In the UK, you must notify your Distribution Network Operator (DNO) when you install an EV charger.

  • Connect and Notify: If your property is suitable, the installer can install the charger and notify the DNO within 28 days.
  • Apply to Connect: If your property has a “looped supply” (shared with a neighbor) or a small main fuse, the installer must apply for permission before the installation can take place.

3. Physical Requirements

  • Off-street Parking: To install a charger under most schemes (and for general safety), you must have a dedicated driveway or garage. You cannot run a cable across a public pavement.
  • Wi-Fi Signal: Smart chargers require a connection to the internet to manage schedules and receive software updates. If your Wi-Fi doesn’t reach your driveway, you may need a Wi-Fi extender or a charger with a built-in 4G SIM.
  • Earthing: Your electrician will check your home’s earthing system. Many modern chargers have built-in “PME fault detection,” which eliminates the need for a separate earthing rod to be driven into the ground.

4. The Installation Day

A typical installation takes 3 to 5 hours. The electrician will:

  1. Mount the charger unit on the wall.
  2. Install a new dedicated circuit from your consumer unit (fuse box) to the charger.
  3. Install a separate RCD (safety switch) if one isn’t built into the charger.
  4. Test the system and show you how to use the app.

Safety First: Never attempt to install an EV charger yourself or use a standard domestic extension lead to charge your car. Standard 3-pin sockets are not designed to run at full power for 10+ hours and can melt or cause fires.

5. Certification

After the installation, you must receive:

  • An Electrical Installation Certificate (EIC) confirming the work meets BS 7671 standards.
  • Evidence of the DNO notification.
  • A compliance certificate for the UK Smart Charging Regulations.