There are really unlimited choices for waxing your motorhome. Currently I use a car was soap with wax in it from Meguiar's - Meguiar's Gold Class Carnauba Plus Liquid Wax. I get a big bottle at Walmart and it lasts for a year or more.
For a number of years after washing I would apply the popular “Wash Wax ALL” product. It was developed for airplanes but works well on RVs and cars. It can be used as an after wash wax, as a wet applied wax or even as a waterless wash system.
It works great is easy to apply but I grew weary of the extra step. Just being lazy in my old age. So that’s why I use the Meguiar's alone now.
Then usually once a year I pay a team of professionals to hand apply wax and power buff it out for about $10/ft. ($370 in my case).
A number of years ago I did get a small electric power washer with a foam cannon feature and that shortens the whole process. Being even more lazy I purchased a water deionizer device to eliminate having to hand dry the RV, which was as massive of a job as washing. There are many of those on the market.
Enjoy that new motorhome!
PS. Since your new motorhome has Lithionics batteries you should be aware of a thread here that is monitored by an electrical engineer from Lithionics to help answering any questions. Here’s a link:
https://www.winnieowners.com/forums/...es-366502.html
Don’t get the impression that there is a lot of problems with this setup. This system is available on Winnebago travel trailers, too. Most issues are caused by travel trailer dealers that don’t know how to set up or operate the system. But it’s a good resource to have.