7kW EV Chargers Explained
Why 7kW is the typical home EV charger rating in the UK, what it means for charging times and what affects whether your property can support one.
Why 7kW is the typical home charger
Most UK homes have a single-phase electricity supply. On a single-phase supply, around 7kW is the practical maximum for a home EV charger, which is why most domestic chargers are sold in this rating.
Three-phase supplies, more common in commercial buildings, can support faster charging, but relatively few homes have them.
What 7kW means in practice
A 7kW charger delivers considerably more power than a standard three-pin socket, which makes it realistic to add a meaningful amount of range overnight.
Actual charging speed also depends on your car's onboard charger, the battery's state of charge and, with smart chargers, any limits set by load management or your chosen schedule.
Can my home support a 7kW charger?
That depends on your main fuse rating, your existing electrical demand, the condition and capacity of your consumer unit and your earthing arrangement.
Where the total demand could exceed the supply, load management can reduce the charger's output automatically while other large appliances are running. We check this as part of every EV charger survey.