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The rate at which electricity charges you EV is measured in kilowatts (kW). A standard home with a standard single phase electricity board will need a 7kW charging station, meaning the charger will have a maximum power output of 7 kilowatts. This is classed as a fast charger (charging from your standard 3 pin house plug is termed a slow charger).
A 22kW EV charger is a charger that charges three times faster than a 7kW charger, charging at a rate of 22 kilowatts. 22kW is the highest rated charger you can have installed at home, and its also classed as a fast charger. In order to have a 22kW EV charger, you must have a three-phase electricity supply – you cannot have a 22kW charger on a single-phase supply.
Which means for most people you will have to apply for a fuse upgrade by contacting your DNO (Distribution Network Operator) if you want to upgrade to a three-phase supply.
Its also worth considering that not all vehicles can charge at 22kW, the most common being typically Tesla, Renault Zoe, BYD and Audi.
Upgrading to three-phase will be expensive, with costs starting from £1,500 + vat but generally the cost of upgrading your electricity supply to three-phase can average between £3,500-£5,500 + vat. In some cases, a three-phase fuse upgrade for a 22kW charger can even reach up to £15,000, depending on the complexity of the job.
For some people the option to charge faster is worth the investment, or they may have multiple electric vehicles at their home. For most though the 7kW charger is perfect for their needs.
