Charger, BMS and battery

[twhouse1]

I have a simple 12v 60a LIFEPO4 (4 fortune batts) and an overkill solar bms. I also have a Victron Blue Smart charger (12v/15a) to charge up the battery pack.

I would expect to attach the + and - from the charger directly to the 'final' + and - of the battery. The BMS (120a 4s overkill solar) is attached to the 'final' + per drawings.

This means the Victron charger is responsible for properly charging the battery and not the BMS (connected to a generator). (4 modes include Li-ion, recondition, High (14.7v) & Normal (14.4v) > In this case the BMS is watching the cells and max amps out (batt is 2C so tops out at 120).

Question: do I have this right, or is there some other way to wire this?

PS: Victron 800w inverter is being used - so don't expect to hit 120a.

 

[Brett V]

No, the charger has to go through the BMS. Bypassing it forfeits your protection and eventually bad things will happen!

 

[twhouse1]

Thanks Brett~! Forum Users: I was able to validate with supplier that the charger should attach to the BMS out - and the BMS is a 'two way' switch and is designed for this.

 

[MisterSandals]

The BMS (120a 4s overkill solar) is attached to the 'final' + per drawings.

No, the BMS needs to be on the negative end of the battery. What drawings show it on the "'final' +"?