Inverter issue?

Hey guys! I think im having an issue with my inverter. 2020 pete 579. Has the smart air and auto start and the factory inverter. When im chillin playing games after a shift my inverter voltage goes all the way down to like 12.2 on the inverter control deal in a pretty short amount of time. I have to go start the truck so it can charge back up. The issue is it gets so low before the apu batteries are low enough to make the truck auto start that the auto start disengages. 4 brand new batteries…

Inverter issue?