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Is Your Home Ready for an EV Charger?

Answer 5 quick questions about your home's electrics. Find out if you need a consumer unit upgrade before you book installation.

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BS 7671
based criteria

EV Charger Readiness Check

5 questions about your home's electrical installation

Question 1 of 5
What type of consumer unit does your home have?
Look in your cupboard under the stairs, garage, or utility room — usually a white or grey box with switches.
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Question 2 of 5
How old is your home's wiring?
If you're unsure, check when the house was built — wiring is often original unless you know it's been rewired.
2 of 5
Question 3 of 5
Do you have a dedicated off-street parking space or garage?
A home EV charger must be mounted near where you park — the cable run from your consumer unit affects cost and feasibility.
3 of 5
Question 4 of 5
How many circuits are currently on your consumer unit?
Count the switches/breakers in your consumer unit. A 7kW EV charger needs a dedicated 40A circuit.
4 of 5
Question 5 of 5
Has your home had an Electrical Installation Condition Report (EICR) in the last 10 years?
An EICR is a formal inspection by a qualified electrician — not a visual check or a builder's sign-off.
5 of 5

Want a complete picture of your home's electrics?

The EV check covers readiness for a charger. A full VoltScore shows the condition of your entire electrical installation — wiring, consumer unit, earthing, RCD protection, and more.

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What affects EV charger readiness

Four things your electrician will check before installation

Before a home EV charger can be safely installed, a qualified electrician will assess four key aspects of your electrical installation. Understanding these in advance means fewer surprises on installation day.

⚡
Consumer unit condition
Needs a spare way for a dedicated 40A circuit. Old fuse boxes will need upgrading before any 7kW charger can be installed.
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Main supply capacity
A 7kW charger draws around 32A continuously. Your DNO (distribution network operator) supply fuse must be rated at 60A minimum — most modern homes are 80–100A.
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Wiring condition
EV chargers add sustained load over many hours. If your wiring is over 40 years old or hasn't been inspected recently, an EICR before installation is strongly recommended.
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Cable run distance
Chargers are typically installed on an exterior wall near the parking space. Longer runs from the consumer unit increase cost — detached garages often need armoured SWA cable.

How much does a home EV charger installation cost?

A straightforward 7kW home EV charger installation typically costs £800–£1,200 including the unit and labour. If a consumer unit upgrade is required, add £500–£1,500 depending on the type of upgrade needed. Some EV charger manufacturers offer OZEV-approved installers who can handle both the charger and any necessary electrical upgrades in a single visit. An OZEV grant of up to £500 is available for renters, flat owners, and landlords — homeowners with a driveway are not currently eligible.

Getting a VoltScore before booking an EV charger installation means your electrician arrives knowing the condition of your installation — reducing the chance of unexpected upgrade costs on the day.

Common questions
Most UK homes built after 1990 can accept a standard 7kW home EV charger without major work. Older homes — particularly those with fuse wire consumer units, rubber or lead wiring, or a main fuse under 60A — may need an upgrade first. Use the free check above to see where your home stands.
Not always. If your consumer unit is modern, has RCD protection, and has a spare way available, you likely won't need an upgrade. If it's an older unit without RCDs, has no spare ways, or is a rewirable fuse box, your electrician will almost certainly recommend an upgrade before installing a charger.
It's not a legal requirement, but it's strongly recommended if your wiring is more than 25 years old or hasn't been inspected recently. EV chargers place sustained load on the installation over many hours — any existing weakness in the wiring will be stressed. An EICR before installation gives you and your electrician confidence the installation can safely handle the additional load.
A 7kW single-phase AC wall charger is the standard home EV charger in the UK. It charges most electric cars from empty to full overnight — typically 8–10 hours. It requires a dedicated 40A circuit from your consumer unit and is installed by an OZEV-approved or Part P registered electrician. An OZEV grant of up to £500 is available for renters, flat owners, and landlords (not homeowners with a driveway) — your installer claims it on your behalf.
A straightforward installation typically takes 2–4 hours. If a consumer unit upgrade is needed first, allow a further half day to full day. Your installer should carry out a pre-installation survey before booking the work — if they don't offer one, ask for it.

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