For what it's worth, on every one of our RV trips along with the built-in Onan generator we carry along a little portable Honda generator that's at least 28 years old.
It's a Honda EX650 650 watt generator in excellent condition. It starts on the 1st pull after sitting for months or years and doesn't care whether it's burning pure gas or ethanol gas. It charges batteries or runs small appliances in our RV for around 5 hours on 1/2 gallon of gas.
You can still see them on eBay in various conditions usually for $200 - $300 and they make a great little backup RV generator that runs super quiet at a constant 54 dB sound level regardless of how heavily it's loaded.
Just something inexpensive and reliable to consider for other than powering microwaves or air conditioners.
