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Sergio · 10-08-2020, 11:36 AM

Connecting the charger negative to BMS C- is correct.

The BMS B- to pack negative wire needs to be 12ga or better depending on your charger output current.

The BMS will stop the charging if any cell goes above your maximum cell level setup.

You should also consider protecting the cells (not entire pack) from going into low voltage while driving.

10-08-2020, 11:36 AM	#6
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Simple BMS wiring question Connecting the charger negative to BMS C- is correct. The BMS B- to pack negative wire needs to be 12ga or better depending on your charger output current. The BMS will stop the charging if any cell goes above your maximum cell level setup. You should also consider protecting the cells (not entire pack) from going into low voltage while driving.