Why does my 4.6 kW / 7.2 kW charger only charge 3.7 kW at a 11 kW wallbox?

  • Simply said, the power grid in central Europe consists of three parallel "power connections". Experts call this 3-phase, because every single "power line" is called a phase. (Technical department: direct current, alternating current, three-phase current). An 11 kW wallbox supplies a total of 11 kW, but these are distributed over the 3 phases. So basically it only delivers 3 times 3.7 kW.

    Since the smart ED4, without 22kW charger (Does my smart have a 22kW charger?), can only charge with 1-phase 4.6 kW / 7,2kW, it is limited to a third of the wallbox output and therefore only charges 3.7 kW. To be able to charge the full 4.6 kW / 7,2 kW, you would need a 22 kW wall box. This provides 3x 7.2kW.


    Note:

    • It's a different story for the rest of the world
    • Left hand driven Euopean models are limited to 4,6 kW, the rest of the world is limited to 7,2 kW.


    4,7kW an 11kW

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