Hey there, I am having a big problem wiring my 4x3s lipos to make a 12s setup. I have the wiring between batteries done, but the bms is giving me problems. I’ve attached a diagram of my wiring, but forgot an antispark key between the charging port and the volt meter.
I fully charged all 3s batteries to 12.6 (4.2v/cell) before wiring, and now they are at the voltages at the left in the diagram. They have never been discharged and haven’t even been hooked up to anything that would discharge them. I am at a completely loss as to how that would happen, but here we are.
Is my diagram correct?