Preparing Your Home for an Electric Vehicle Charger Installation

By A Guide to Electrical Safety in the Garden
Comments 35
3 Jul 2026

Preparing Your Home for an Electric Vehicle Charger Installation

Start With Your Electrical Supply

Before you choose a charger, it is worth understanding what your home can actually deliver. Most UK properties have a single-phase supply protected by a main fuse of 60A, 80A or 100A. A 7kW home charger pulls around 32A continuously for hours at a time, which is a substantial load on top of an oven, shower, tumble dryer and immersion heater. If your supply is 60A, an installer may recommend a load curtailment device, which monitors the whole house and temporarily reduces charging when demand elsewhere is high, so you never trip the main fuse.

Two things often get overlooked. First, some older terraced and semi-detached homes still have a looped supply, where one cable serves you and a neighbour. That can complicate installation and may need the distribution network operator to separate the supplies before work begins. Second, earthing matters. If your home uses a TN-C-S (PME) earthing arrangement, the charger may need a dedicated earth electrode or equipment with built-in open-PEN protection. Not every job requires it, but it is sensible to ask the question early rather than discover it on the day.

Decide Where the Charger and Car Will Actually Sit

Walk outside and picture the car parked exactly where it will be every night, not where it occasionally ends up. The charge point should be within cable reach of the charge port, and you want the cable to hang naturally rather than loop across a path or press against a wall.

Tethered or untethered? A tethered unit has a cable permanently attached, usually 5m or 7.5m. An untethered socket lets you use your own cable and suits households with two different EVs.
Height and access. Around 1.2m to 1.4m above ground is comfortable for most people, keeps the unit clear of standing water and is easy to reach in the rain.
Weather and sunlight. Chargers are built for outdoor use with appropriate IP ratings, but a screen facing the full afternoon sun can be hard to read.
Cable management. A holster or hook stops the cable lying in a puddle or being driven over. Small details like this make daily use far less irritating.

Plan the Cable Route Before Anything Is Dug or Drilled

Cable length affects voltage drop, cable size and cost. A short run in 6mm² armoured cable is straightforward; a fifty-metre run across a garden may need 10mm² or more, and that adds money quickly. Agree the route with your installer before any groundworks start.

Bury armoured cable in ducting at least 450mm deep, with warning tape above it, and take photographs of the trench before backfilling.
Keep the route well clear of gas, water and drainage services, and avoid planting beds where you plan to dig again in future.
Use gentle bends rather than tight corners, which can damage the cable sheath and make pulling cable through ducting difficult.
Where the cable passes through a wall, drill with a slight fall to the outside so water runs away from the building.
If the run passes through a garage or outbuilding, think about whether anything else there might need power later.

If you are landscaping, laying a duct now while the garden is already open is far cheaper than digging it up next year.

Choose the Charger and Your Tariff Together

Charging is only cheap if you charge at the right time. Many suppliers offer electric vehicle tariffs with a very low overnight rate, and most modern chargers can be scheduled to start and stop automatically. This is where a smart charger earns its keep: it can be set to use only off-peak windows, show your energy use in an app, and in some cases divert surplus solar generation into the car instead of exporting it.

Think about whether you want three-phase charging at 22kW. Most UK homes do not have a three-phase supply, and most cars cannot accept that rate anyway, so 7kW remains the sensible default. If you are considering solar panels or a battery in the next few years, mention it now, because the charger choice affects how neatly the whole system works together.

Permissions and Paperwork

If you own your home, a wall-mounted charger on a driveway usually falls within permitted development rights in England, but this is not automatic in conservation areas, on listed buildings, or where the property is a flat or maisonette. Leaseholders and tenants need written permission from the freeholder or landlord. Your installer will normally handle the notification to your distribution network operator, but it helps to know it is happening. Grant funding for home charge points has changed several times in recent years, so check current eligibility rather than relying on what a neighbour told you.

Getting Ready for Installation Day

The job usually takes a few hours, but a little preparation makes it smoother. Clear the area around the consumer unit so the electrician can work safely. Move the car off the driveway, or park it where it will not block access. Keep children and pets indoors while the supply is isolated, and expect a short period without power.

If you have a question about your supply capacity, earthing or cable route, ask before the day of installation rather than during it. A well-prepared home means a tidier job, fewer surprises and a charger that quietly does its job for years.

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5 Comments

Robert Sonny says Jul 21, 2024 at 10:00am

I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
Reply
- John Abraham says Jul 21, 2024 at 10:00am
  
  I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
  Reply
  - Robert Sonnysays Jul 21, 2024 at 10:00am
    
    I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
    Reply
Robert Sonny says Jul 21, 2024 at 10:00am

I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system
Reply

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