I had a strange experience with my Quattro 15000 + 1460AH Rolls Flooded Battery running on firmware 481 with Hub 2v3 Assistant loaded. The system is AC Coupled with 2 Frunius PV Inverters. The system worked fine for about 2 hours. Suddenly, the SOC dropped from 100% to 35% at a voltage of 51v and the system shutdown because of low SOC Shutdown. I connected my MK3-USB to unmark the "Shutdown on SOC". The system started again at 35% SOC and the battery voltage looks pretty good.
What could be the cause of this sudden SOC drop when the battery voltage still looks pretty good.
