Beginner Question Thread! 2023 Edition

[b264]

Discharge via BMS or Bypass BMS? [SRO]

@b264 Connecting the last positive balance wire to charge in the pic above with the blue circle produces a faulty reading showing the voltage .3 volts higher than the p-group really is. I take it off the charge and it drops back down immediately and shows even with the others. I now charge off the main red and shows normally. [image] [image]

@hummieee

I think connected the positive charge wire to the last balance wire as in the pic above with the blue circle has produced a faulty reading showing the voltage .3 volts higher than the p-group really is. I take it off the charge and it drops back down immediately and even with the others.

Where is the black wire connected?

@hummieee

I think [I] connected

Is better to know than to think. I know batteries are hard because you can’t turn them off during service. One way to be sure is to put a DMM from ground (B-) to the red wire and make sure it’s the highest voltage reading you can find. Should be about 106.2V for that battery.