There is too much information, sometimes discrepant, about setting up the right parameters of a Multiplus II 48V with LiFePO4 batteries. So, I set my values as below and I would like to start a free discussion about why it could be good and get your feedback telling us why it could not be good. My setup is:
Inverter tab:
DC input low shut-down : 44.8V (2.80V on cells)
DC input low restart: 47.0V (2.93V on cells)
DC input low pre-alarm: 47.0V (same as low restart)
I set my Quattro to shutdown at 48 volts. On the odd chance that my battery gets that low, I will likely need to use power on the DC side to troubleshoot. My battery has never seen voltage below 50 volts, so 48 volts is pretty low.
I am not in an ESS environment. My equipment is deployed in an RV, so your mileage may vary.
My understanding of “shutdown” is that this is the limit to prevent damaging the batteries. This said, you can tailor what you really want by setting a minimum SoC in ESS (that I use). In this case, the minimum SoC is the deepest the system will go unless if the system is off-grid. I “guess” that if in off-grid for some reason (e.g.: grid is down), then the “shutdown” will be the limit.
