The higher the #kW rate of the #Wallbox, the higher the #Amperage consumption and the quicker the #vehicle recharging time to reach the same #kWh amount:
The recharging kW rate of a #BeV is not constant during a given cycle; it might start high (e.g. 11 kW) but will go down (to maybe 5 kW) towards the end when the #battery is nearly full.
A 3-phase #wallbox recharges a #car battery three times as fast as a single phase #device to reach the same #kWh amount - hence the final #electric cost is ultimately identical.
