A generator is great to have. Without it, you are going to be pretty limited on what you can use in your RV… like a fridge, TV, A/C, etc.

The most important things that I think of in buying a generator for an RV or motorhome is:

How quiet is the generator?
Does it start easily?
How much current does it put out?
How large is the fulltank / how often are you goint to need to refuel it?

I’d suggest you head out to a RV and/or lawnmower type store and talk to a salesperson about what you need. Bring the RV if possible, and you can see about getting the fit right and connectors you might need.

Safety first! Always keep in mind when you use a generator there is carbon monoxide. You should always inspect the exhaust system on the generator set before using it. Do not operate a generator with a damaged exhaust system. If you’re using a portable generator set make sure the exhaust is directed away from the camping area. Test your carbon monoxide detector for proper operation prior to using the generator. Never run a generator when you or anyone else is sleeping. Observe campground etiquette. Do not run your generator after quiet hours.