Hi all, We have two AC500 with one each B300S running in dual phase. The PV priority setting has worked like a charm for the past year. We expanded our system with one B300K per system and now it won’t switch to the grid. Last night, it bypassed the set SOC setting, and the system shut down. This morning, I isolated each battery, and all four said that the firmware is up to date.
I’ve tried everything that I’ve read to no avail. I believe it’s a firmware issue as all four batteries are recognized and charging. Please help as our system won’take it through the night nor through my work day on Monday. 
