[valdiorn]

indeed - I would have thought a separate battery to run the cabin and safety features would be a good idea. I would only have to be 1/100th the size of the motor batteries.

[adamsb6]

This is the way it works, the high voltage battery is used for the motors and to feed the 12 volt battery which feeds cabin electronics.

I’m guessing by extremely unfortunate luck both batteries failed at the same time.