Hi Bill,I recommend no BMS. I have had my 195AH (16S) bank in service for 9 months now with no BMS and the highest and lowest cells measured at float, are 10 millivolt out of balance. Maybe a cell monitor would be helpful, but I don't know of one that will handle 18S. 18S will have an absorb setting of 62.1V. Will your inverter handle that? I have seen 17S, even tried it myself, but my backup 51.2V LFP charger wouldn't work with it, so I went with 16S.
bill von novak said:
Does anyone have any recommendations for a good LiFePO4 BMS for an 18S array of CALB 180AH cells? My current AGM bank is dead and I'm looking for a longer lasting replacement.