Thank you very much for the analysis. I suspect it was the on board charger as well. In fact the charging was interrupted during the last charging session when it was about 20 minutes into the charging. Then it stopped and tripped the circuit breaker in the house. After that, no further...
Wondering if I could borrow this discussion topic to share my i3 charging issue. When the charging plug is inserted into the car, the blinking yellow light comes on meaning that the plug is engaged. But what follows got me confused. The house circuit breaker tripped and the blue light did not...