What is a wallbox?

A wallboxGlossary · EV chargingWallbox (home wall charger)A wall-mounted EV charger that charges with AC from its own circuit in the panel and communicates with the vehicle for safe charging. is permanently connected to its own circuit from the distribution board and communicates with the car, so charging starts only when everything is correctly connected. Compared with a portable cable plugged into a standard socket, it delivers more power and is safer for daily charging over many hours.

The power depends mainly on your supply. On a single-phase supply, a wallbox usually delivers 3.7 or 7.4 kW, while on a three-phase supply it can reach 11 or 22 kW. At 7.4 kW, for example, a car gains roughly 35–45 km of range per hour of charging, depending on its consumption, so an overnight charge easily covers daily driving.

Actual charging speed is limited by the weakest link: the supply, the wallbox or the car's on-board chargerGlossary · EV chargingOn-board Charger (OBC)The converter inside an electric vehicle that turns the station's AC into DC and sets the maximum AC charging power.. Many cars accept up to 11 kW on AC, so a 22 kW wallbox will not charge them any faster.

Before buying, ask an electrician to check your supply, and choose a wallbox that suits both the supply and the car. If household consumption is already high, dynamic load management reduces the charging powerGlossary · EV chargingCharging Power (kW)How much energy flows into the battery per hour, which in AC charging depends on voltage, current and the number of phases. when other large appliances are running.