We get it – You’re ready to start your home charge journey but you have some questions about which power (7kW or 22kW) is right for you? If you want to charge your electric car at home, you’ll need to know a few things to decide if you can upgrade to a 22kW Fast charger. This will all depend on if you have a ‘single’, or ‘three-phase’ power supply. In this guide, we’ll explain the difference between the two.

Single-phase = power flows through one conductor

Three-phase = power flows through three conductors

UK households most commonly have single-phase connection in their fuse box. It’ll look something like the below –

single phase

Whereas a three phase connection will look like – 

three phase

It’s less common for households to already have three-phase connectors. Depending on the power needs of the house, some may be able to have a three-phase connection fitted to their fuse box. However, this would need to be done pre-installation of the home charger. 

The difference between the two connections is the power supply, single-phase is capped at 7.4kW whereas the latter is capped at 22kW. The more power, the quicker your home charging point will charge on your car.

Single and Three phase