A:if you want to judge if the BMS is damaged, please take the following steps, to test if each cell voltage is the same as with the voltmeter. if the cell voltage difference is over 1.0V, the fault is displayed that it cannot run far, no power supply at the start range, short charge time, all these issues are almost caused by battery cells, if BMS damaged is displayed as no charge, no discharge, no discharge while the battery has voltage.

Q:2. What are the common ports and separate ports? what is the difference?

A: We take 13S48V16A BMS as an example, common port 16A means your charge cathode and discharge cathode are connected in the same point end(our P-), charge cathode and discharge cathode are used in the common connection port, so the charge current and discharge current are the same 16A. while the separate port is separately connected by charge cathode (C-) and discharge cathode (P-), so the charge current and discharge current is different, discharge current 16A, charge current 8A.

Q:3. Do you have a current sample in stock?

A: Most regular one we have. usually, we will ship out 3 days after you paid