The Champion 3100W looks like a better value than the Yamaha EF3000iS. About half the price and 58dB which is slightly quieter than the Yamaha's 60dB..............Champion has a 3100 inverter generator that sells for about $900.
Saw a demo for it at an RV show, not a bad unit.
Should fit the bill, check it out.
I'm trying to find dimensions on max. height. 22 inches is the max height for me to store it in the bed of my pickup with the tonneau cover closed.
.