Recovered 4s 30a 12v Lifepo4 BMS

These BMS units were all recovered from 12v lifepo4 batteries. We include the balance lead wires as well.

These are for 4s batteries. The top left tab goes to the battery negative and the top right tab goes to the battery positive. The bottom left tab is used for your new negative and the bottom right tab is used for your new positive for charge and discharge.

The balance leads go from right to left starting with the black wire which goes to the main negative, yellow wire goes to cell #1 positive, brown to cell #2 positive, green to cell #3 positive, and ending with the red wire which goes to the main positive.

Fully charged cutoff at 3.65v per cell and cully discharged cutoff at 2.5v per cell. 30a continuous charge/discharge. There is a 30a fuse as well on the BMS. Passive balancing occurs near full charged voltage while charging.