Sys writes:
Still early days, but my money is still on the charger or temperature
sensing within the battery.
Some time in the past, a poster (here or somewhere else) mentioned that an inspection showed wiring errors.
I wonder what they were and where they were at.
If a harness was mis-wired so that charge sensing was swapped between two cells - cell A being read as cell B and vice versa - it would eventually lead to an overcharge situation.
If the swap happened on cell temp, then a cell going into thermal runaway would be allowed to do so as the corrective action would be applied to the wrong cell.
Wow.