I’m experiencing problems with my generic 3S 40A BMS.
It cuts off current (stops charging/ turns off) much before expected.
As much as I know - it should charge until every battery reaches approx 4.2V, but in my case - it stops charging when my batteries are around 4.13V.
The power supply is set to 13.5V / 1.1A.
I soldered another board, but the problem still exists.
I can manually charge every battery to 4.2V using my power supply, but not with this BMS.
And ideas on what could be wrong ?