Not all small generators are created equal. The Honda Eu1000i weighs 29 lbs and two coupled together puts out 16.6 amps. Most microwaves use 11 amps or less. RV fridge's average highest draw is at startup around 7 amps. So you might have to turn off the fridge while running the microwave.Had a couple 200s? and coupled them but they didn't generate enough power for microwave or fridge.