Wtf!?! Surely that can't be true, as Mercedes claim it will charge in 1.5hrs from a 7kw home wallbox which are only single phase.The 7.4kw transformer in the a250e is actually two 3.7kw transformers working in tandem. So a single phase charger (even if its 32A) wont give you 7.4kw. You need to charge from a 3-phase charger. The old B250e used all 3 phases which gave you 3.7kw * 3 = 11kw.