I have both the Honda eu3000i and the Honda Handi i3000 generators. Both have issues running 15000 BTU RV air Conditioners on hot days. My friends eu3000i have the same issues. They sometimes run the 13500 AC except in extreme heat. Hope your runs better.
Friends with the HF Predator 3500 don't have issues in the extreme heat running their 15.000 BTU RV AC.
They went on sale so I bought one. About $100 bucks off.
Almost 50 lbs lighter than the big Honda and in the recent 103F heat ran the RV 15000 AC with ease. Just pick up a little load and hummed at 50% capacity.
I regularly buy HF stuff but have never had any confidence in their stuff. It was usually I need the tool or item today and if it grenades after one use,, well, it was cheap, I got the project done.
So far I'm impressed. Cheap and friends say if it pukes HF offers a no hassle exchange they say is real.