The loading capacity of your charging station, in turn, determines how much capacity your electrical connection must have. The higher the charging capacity of your vehicle, the more this requires of this electrical system:

AC charging capability Required electrical connection

3.7 kW 1-phase 1 x 16A

6.6 kW 3-phase 3 x 16A (2 phases are used)

7.4 kW 1-phase 1 x 32A

11 kW 3-phase 3 x 16A

22 kW 3-phase 3 x 16A (Because 99%. of cars can charge up to 11kW)

Also be careful with the capacity tariff, then you don’t want to charge too fast and then 7.4kW is the recommended charging speed which is optimal between cost and comfort. (also for 3 phase installations).