Installing a home EV charger: grants, DNO notification and what drives the cost

Fitting a home charger usually takes an electrician less than a day. What happens before that – survey, grant application, network notification – decides whether it is a simple job or a long one. This guide walks through the steps for homes in the UK.

1. Survey

A good installer starts with a survey, in person or from photos:

• Supply and main fuse. Most homes are single phase; the fuse rating determines how much headroom there is for a 32 A charger.
• Consumer unit. Is there a spare way, or does the charger need its own small consumer unit?
• Cable route from the meter to the parking space: through walls, along the house or under the drive. This is the main variable in cost.
• Earthing. Many UK homes have a PME (TN-C-S) supply. Wiring regulations require protection against a broken PEN conductor for EV charging outdoors, either built into the charger or by a separate device or earth electrode. Ask how your installer will handle it.
• DC fault protection. An RCD Type B, or Type A combined with 6 mA DC detection in the charger. 48 of the 67 chargers in our database have the DC detection built in.
• Connectivity at the parking space: Wi-Fi, Ethernet or 4G. In our data 51 chargers have Wi-Fi, 35 Ethernet and 40 a 4G modem.

2. Grant for renters and flat owners

The EV chargepoint grant pays 75% of the installation cost, up to £500 ¹. Key conditions ^1,2:

How it works: get permissions, get a quote from an authorised installer, apply with your tenancy agreement or a utility bill, and after installation the installer claims the grant and deducts it from your invoice ¹. The government’s authorised chargepoint model list ³ shows eligible models; 21 of the chargers in our database are on it.

Owner-occupiers of houses are not covered by this grant.

3. Notify the network operator

Every new home charger must be notified to the distribution network operator (DNO). Your installer does this through the ENA’s Connect Direct platform, where many applications are approved almost instantly ⁴. Where the maximum demand is between 60 A and 100 A, network operators aim to confirm whether the connection is suitable within 10 working days; if the network needs work first, that takes longer ⁴.

Load limiting can avoid that work: a charger that automatically reduces its current when the house is busy puts less strain on the connection. See our load balancing guide.

4. Installation day

1. Dedicated circuit with the right protective device and cable size for the charger and cable length.
2. RCD and PEN-fault protection as agreed in the survey.
3. Wall mounting where the cable reaches the charge port without trailing across a footpath.
4. Commissioning: maximum current, load balancing, app or back-office connection, and the smart settings required by law.
5. Paperwork: an electrical installation certificate and the DNO notification reference. Keep both.

5. Smart settings on day one

Every home charger sold in Great Britain must meet the Smart Charge Points Regulations 2021 ⁵. After installation it will, by default, avoid weekday peak hours (8:00–11:00 and 16:00–22:00) and add a random delay of up to ten minutes to each start. You can change these defaults in the app, and set up the schedule that suits your tariff.

6. What drives the cost

There are no fixed prices for installation. Quotes vary mainly with:

• Distance and route between meter and parking space;
• Consumer unit – spare way, or a new unit needed?
• Earthing – built-in PEN-fault protection or an earth electrode;
• Load management hardware – CT clamp or meter;
• Groundworks for a detached garage or a post-mounted unit.

Get at least two quotes on the same basis (same charger, same cable length, same protection), and ask whether the DNO notification and grant paperwork are included.

Checklist

• Supply, fuse rating and earthing checked?
• Grant approved before installation (if eligible)?
• DNO notification submitted?
• Load management fitted and configured?
• Installation certificate and commissioning report received?

Find models that fit your installation on the EV charger overview.