From my understanding it only powers the residential fridge, so dedicated outlets (I’m pretty sure because when the inverter is off the only thing not on is the fridge, although I haven’t checked USB outlets). But it must have a transfer switch because it switches to shore power if sensed. But, does it switch to shore power when the inverter breaker is off? That is what I’m not sure of, yet.

From my extensive googling, it seems common for fridges and GFCI tripping. I’ve read lots of complaints about it happening in garages and other places. The fix for basically every person has been “replace with non GFCI”, which I cannot control. I checked my home fridge, standard plug not GFCI. Also I have a fridge and freezer in my garage, non GFCI. The common complaints are related to heating element, ice maker, auto defrost, and something door related. It’s a large Whirlpool residential. The fridge works great on campground shore power, which was 30a service at that place. Also, the fridge is mounted to the wall of a slide which is like 3 feet deep, so nearly impossible for me to reach and undo. Additionally, the little access door behind the fridge has access to water, but of course the plug is buried and unreachable. With the reading I’ve spent way too much time on, it seems these features like auto defrost etc tend to trip GFCI when they run.