We were using the generator for the air conditioner in our RV. All was fine for about an hour. Then I noticed the generator had dropped off the Inverter and was being powered by the lithium batteries. I also noticed the batteries temperature was well over 135 F. All systems were turned off. the generator isn’t communicating with the Inverter . Using the app under History/max/min the min is reading 0.01V? Any suggestions on trouble shooting Or what causes the min to drop to 0.01V?