Thanks for the insight! I guess what is so interesting is that it works fine much of the time, but others it just tanks.
I should note that while it's the one GFI outlet that pops, no others do, and the entire line on that side of the breaker is down - so the GFI, 2nd AC, Fireplace, Fridge. I've flipped the breakers at the panel with no luck resetting. It's like that one GFI powers the whole line. And that GFI is what pops when I turn the 2nd AC on or the fireplace on, yet they are on different breakers. All on the left side of the main breakers in the box, but they each have their own circuit breaker.
In my research I thought about the transfer switch, particularly because Keystone had a recall (and supposedly mine was replaced before I purchased it). But would the transfer switch allow full operation on generator but kill one leg of power if it was bad?
How does one tell if it's the ground? And what is the fix?
Do I turn the converter off at the breaker or do I need to actually find it and physically do something to turn it off?
I'm crossing my fingers it's just the power cord lacking a tight fit because the ring is missing lol. I don't have shore power at home, so will have to wait until the next trip this weekend to validate that theory.