I have two SmartSolar MPPT 100/20s that I am planning to install. The Battery is 12V 4S LiFePO4. I would like to use a BMS to disconnect charge sources if the BMS detects an over-voltage on one of the four battery cells. If the battery-side of the controller circuit is interuppted by the BMS, but the Solar PV circuit is intact, will the controller suffer damage?
I could add two relays, one to each controller, to also interupt the PV circuits at the same time. However, I am wondering if this is really necessary?