champion 100263 3400 watt inverter/generator question

I have the Costco Black Version 3100, gas only, and I was able to run my 13.5BTU a/c. Fridge, and Inverter no problem for one week straight in 100-110 degree temps 10 hours each day,,,ran like a Champ! No oil useage, and quiet enough.. Especially compared to my campground neibors with their ONAN's with holes in their mufflers and others in the campground with Harbor freight gen sets...