There is ground-fault, AC signal on the DC buss that if the charger is not isolated, will trigger a fault. Use an AC coupled oscope probe to see the signal. The number "2.5" comes to mind which may be the signal level. Search should find it. If the chargers are isolated from car ground, you should be OK. Bob Wilson
Yes. One of the first problems folks had to resolve was how to connect their charger and battery packs without tripping the ground fault. The folks doing traction pack, powered inverters ran into this problem too. The German student making a plug-in NHW11 might have some insights. Bob Wilson
