[Renzm]

Encountered something like this with our G20 M340d xDrive which has this 48v system. Battery charging with the CTEK MXS 5.0 does work however the charger gets noticeably very very warm. It appears that the system doesn't go into a full "sleep state" whilst charging as the BlackVue dashcam battery I use strangely seemed to continue to receive charge well after it shouldn't whilst trickle charging, which doesn't happen when not on the charger. I also saw the "energy management" error appear every time after charging. I spoke to our BMW dealer who said they don't have any information to suggest that the normal trickle chargers shouldn't be used with these models so it is rather confusing. I also asked BMW UK for further assistance as I'm hoping they might be able to say why it occurs or what the specific advice is on charging models with this system.