3. Charging from AC power grid

3.1. Charging from single-phase ac power grid


  • Charging from standard household sockets or charging stands
  • Paremeters in ČR: 230 V, 50 Hz, 16 A
  • Power: P = U I \cos\phi = 230 \cdot 16 \cdot 0.9 = 3.3 \space kW (estimated power factor)
  • The current can be increased using the wallbox.
  • The on-board charger converts the AC voltage and current from the household power grid to the DC voltage and current of the battery needs.
  • At the same time, the BMS communicates with the charger.
  • Be aware of long extension cables; on-board charging systems usually monitor the connection impedance.



  • However, the hosehold socket voltage varies in different parts of the world.
  • In case of 110 V is the power 1600 W only (at the same current of 16 A).





Dipl.-Ing. Bernd Wunder: Ladetechniken für Elektrofahrzeuge, Fraunhofer IISB, Feb. 2018
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