So I’ve just gotten my Wate 46.2V charger after waiting months from China to find that my battery is not charging.
When I plug it in the light goes to red for just a moment and I can hear the fan start, then it goes to green immediately. My battery pack is at 34V and isn’t increasing. Im using a bestech 140 BMS with the following diagram:
As I test with a multimeter with negative on B- and then checking each b2, b2, b3… it builds in 3.1v steps up to 34 on the last one.
When I put the negative on B- and the positive on P- I get the remaining 12v that is coming out of the wall. Any ideas here or have I wired this incorrectly?
The hot wire from my charger is going to battery + and the ground going to P-.
(Please note that my balance wires arent as shown in the diagram, was just to show the other BMS wires)