New to EG4

I just switched over to an EG4 18Kpv from a new Growatt SPH10000 that had issues.  Prior to that I had an off grid setup for 17 years around the Outback VFX3648 inverter with Outback charge controllers, the HUB, the FNDC, and the MATE3. My Outback set up worked well, but was well undersized from my needs for the past 10 years.   Turns out the EG4 18Kpv has some issues and I hope to get those ironed out tomorrow with tech support.  For instance, this morning with snow overnight, the inverter shut down due to low voltage below my generator settings that were to prevent that.  I hope it has nothing to do with my battery bank of 7 SimpliPHI 3.8 52.1v M batteries because I do not want to buy new batteries to replace these that have only been in service for 2.5 years.   I do have the inverter set up for voltage instead of SoC.