Archived: the OG noob question thread! 😀

[tinp123]

Thats good idea. Also, take care that all groups are same or near same voltage. Big voltage difference between groups could be hard to balance for bms.

Here you can read how to do it in details. Same case like yours:

Connecting BMS to batteries

[batttt] 1)first you have to find out if your batteries use same cells and if they have about same usage on them. if one battery is much older or has different cells, you will destroy your bms quickly. if cells are same and same age, continue 2)take first battery (X), take you multimeter and check voltages on balance wires. stick multimeter probe in connector in A and another probe in B. hold first probe in A and move second probe to C, then to D and so on up to G. check voltage of whole pack…