I think I found the solution, a battery generator.

HI Valerie. I don't own an RV, and my car is only a one-seater ( see profile pic ) 🤣😉

But seriously, there are many solutions for full-house power on an RV, even some involving solar panels and backup storage. Then you can run just about anything you use at home, even TVs and small refrigerators. The current they supply can be directed to a battery for overnight use as well.
Safe travels!

Here's a phone number for the experts: https://www.oxygenconcentratorstore.com/blog/st...
Electricity USAGE is the same calculation as Power Demand. Without battery units (ex. Tesla Power wall) you will be keeping the Bears up, for sure! be Well.

Stationary Oxygen Concentrator Electricity Usage and Costs

https://www.oxygenconcentratorstore.com/blog/stationary-oxygen-concentrator-electricity-usage-and-costs/

We have a generator, but we don't like to use it at night. We are thinking about solar but we're not sure if it can power the poc all night