EV Charger Installation Requirements for UK Homes
Updated: Oct 9
A home EV charger in England needs a dedicated circuit that is notified under Part P, a supply and consumer unit that can carry the extra load, RCD protection that copes with DC faults, an earthing arrangement that is safe for a car parked outdoors, and a charger that meets the Smart Charge Points Regulations. Your installer should also register the charger with the local network operator. Most home installations don't need planning permission.
Each of those is a check your installer should make before the charger goes on the wall. Here is what each one means in practice.
A dedicated circuit, notified under Part P
A charger needs its own circuit from the consumer unit, sized for a continuous load of up to 32 A on a typical 7 kW unit. It can't share a ring or radial with other sockets. The IET Code of Practice for EV charging installations expects home charging equipment to be supplied by a dedicated circuit.
A new circuit is notifiable work under regulation 12(6A) of the Building Regulations 2010. That means a registered electrician who can self-certify the work under Part P, or a building control notice before work starts. With a registered installer, you get an Electrical Installation Certificate for the circuit, and within 30 days you should receive a Building Regulations compliance certificate, with building control informed. If the job also needs a new consumer unit, that is notifiable too.
For EV charger installation, we handle the notification ourselves as part of the job.
Supply capacity and the main fuse
Approved Document P says that before adding to an installation, the installer should check that the rating and condition of existing equipment, including the network operator's equipment, can carry the extra load. For a charger, that means working out the house's maximum demand with the charger running alongside everything else, and comparing it with the main fuse and supply cable.
If the numbers don't work, there are two routes. The network operator can upgrade the supply, on their timescale. Or the charger can use load management, which is the next requirement on many jobs.
Load balancing: when the supply is tight
Load balancing (also called load management or load curtailment) uses a sensor on the incoming supply so the charger can see what the rest of the house is drawing. When the oven, shower and dryer are all on, the charger turns its rate down, then back up when demand drops. The IET Code of Practice for EV charging installations covers load curtailment, so a charger with this feature can sometimes go in without a supply upgrade. Where two chargers share a supply, the same idea shares the available current between them.
Registering with the network operator (DNO)
Your local distribution network operator needs to know about the charger. The Energy Saving Trust lists registering the charger with your DNO as one of the steps of a home installation, and notes that the installer usually does it for you. Where the supply needs upgrading, the network operator has to be involved before the charger is connected.
Consumer unit space and RCD type
The charger circuit needs a spare way in the board, or a separate small enclosure, and the right protection. BS 7671 requires each charging point to be protected by its own RCD of 30 mA or less, of Type A, Type F or Type B, disconnecting all live conductors.
The type depends on the charger. Car charging can produce smooth DC fault current, which can stop an ordinary RCD from working. A charger with built-in 6 mA DC detection can be protected by a Type A RCD. Without it, the circuit needs a Type B RCD. We explain the difference, and why a Type AC RCD upstream is a problem, in our guide to Type A vs Type B RCDs.
If the existing board has no space, old rewireable fuses or unsuitable RCDs, a consumer unit upgrade may be needed first.
Earthing: PME and open-PEN protection
Most UK homes have a PME (TN-C-S) supply, where the neutral and earth are combined in the network operator's cable and the house earth is taken from it. If that combined conductor breaks upstream, known as an open-PEN fault, the earth in the house can rise to a dangerous voltage. Inside the house, protective bonding limits the danger. Outside, a person touching the car while standing on the ground has no such protection.
For that reason, BS 7671's section on EV charging does not allow a PME earthing facility to be used for a charger serving a car outdoors unless extra protection is provided. In practice, installers use one of these:
A charger with built-in open-PEN protection. The IET notes that many popular chargers now include it. One common method monitors the supply voltage and disconnects the car within 5 seconds if it goes outside set limits.
A separate open-PEN device fitted to the circuit.
A separate earth. The charger is earthed through its own earth rod (a TT arrangement) instead of the PME terminal, with the RCD providing fault protection.
Which one suits depends on the charger, the ground conditions and the layout, and your installer should be able to tell you which method they have used and why.
The Smart Charge Points Regulations
Since 30 June 2022, chargers sold for home and workplace use in Great Britain must meet the Electric Vehicles (Smart Charge Points) Regulations 2021. A compliant charger must have smart functions, keep charging if its internet connection drops, come with default charging hours set outside peak times (8am to 11am and 4pm to 10pm on weekdays), which the owner can accept, change or remove, apply a randomised delay of up to 10 minutes by default (which the owner can cancel), and meet security requirements. Public and rapid chargers are excluded. The duty falls on whoever sells the charger, but a charger bought from a legitimate supplier is the easiest way to be sure.
Do you need planning permission for an EV charger?
Usually not. In England, a wall-mounted charger within an area lawfully used for off-street parking is permitted development under the General Permitted Development Order, subject to limits, including a maximum size for the outlet and its casing. A freestanding charging post on a driveway has its own height limit. The exceptions are a listed building or its curtilage, and a scheduled monument, where you'll need consent. Running a charging cable across a public pavement is a different matter, and one to raise with your council first.
EV chargers for flats and rented homes
The electrical requirements are the same, but the permissions aren't. In a flat, the parking space, the wall and the cable route may belong to the freeholder or management company, so you need their written consent before anything is fitted. In a rented home, you need the landlord's agreement. Since 1 April 2026, government chargepoint grants have been aimed at people who live in flats or rent, households with on-street parking, residential landlords and workplaces (owner-occupiers of houses with their own driveway are not among the eligible groups), and the charger must not be installed until you have been told you are eligible. Check gov.uk for the current rules.
Can you install an EV charger yourself?
Legally, you can only do notifiable work yourself if you notify building control before you start and the work passes their inspection and testing. In practice, a charger involves a new circuit, earthing decisions, RCD selection, testing to BS 7671 and DNO registration. Electrical Safety First's advice is that a home charging point must be installed by a registered and competent electrician trained to install EV charge points. We'd say the same.
The number of homes adding chargers, heat pumps and other heavy loads is changing what household supplies have to carry, which we cover in our look at UK home electrical trends. If you'd like us to check your supply, board and earthing before you buy a charger, get in touch for a survey anywhere across Wolverhampton, Telford and Shropshire.
EV charger requirements questions, answered
Does an EV charger need its own consumer unit?
Not always. It needs its own circuit and its own RCD. That can come from a spare way in the existing board or from a small separate enclosure next to it.
How far can the charger be from the consumer unit?
There is no fixed limit, but the cable must be sized for the load over that distance, and longer runs cost more. A detached garage or a drive away from the house often needs armoured cable and some groundwork.
Can a charger go on a garage wall?
Yes. A garage that shares the house's supply is within Part P, so the new circuit is notified in the same way, and the same earthing rules apply if the car charges outside.
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