Hello, I’m hoping someone can help with my issue.
I have a 220/12/5000 Pair of Quattro’s running in Parallel. For the most part everything is operating as it should, and I don’t notice anything unusual. They’ve been in this configuration about 7 months now. It’s a marine configuration, so I’m not running anything related to ESS or anything requiring anti-islanding. The other questions / solutions I’ve seen with this issue all seem related to that system.
The issue has risen for a 3rd time now, and I’m really unsure how to proceed. At some point, the battery will get low enough that the inverter will shut off. Somewhere between 50 and 60% state of charge. This usually happens when theres an unexpected loss of power in the grid shore power, or generator breaker pops and we are unaware.
At this point, restoring grid power or generator power will put the quattros in passthru mode. The batteries will not charge. I usually have to wait until the MPPT’s charge the batteries back up enough to kick them out of the danger zone before I can get it back to normal.
Yesterday when this happened, I was able to remove the BMS assistant, and the BMS from the system and get it to kick into charging mode again...do I have an overall BMS problem? If I do, it will be the 3rd BMS in 7 months.
Thank you in advance for your help.