What is the difference between 1-phase and 3-phase installation, and how does it affect the charging power?

In a normal household outlet, we charge on 1 phase with 10 Amps, that is, about 2.2 kW. The power in the charging box is primarily dependent on how the charging box is installed and how much power the car can receive.

The installation of an EV wall box can either be done with a 1-phase or 3-phase installation, and the charging box is then set for 1-phase or 3-phase charging, with an amperage between 10A and 32A. In a 1-phase installation, for example, the maximum charging power 3.7 kW with 16A. With a 3-phase installation, the maximum charging power is 11 kW with 16A and up to 22 kW with 32A. Currently, many chargeable cars can only receive 3.7 kW.

Mer will on all occasions, where the home’s electrical center allows it, still install the charging box on 3 phases, and thus prepare for the cars of the future and higher charging speeds. Read more about our standard installation here.