I have one of those shown at Amazon, been using it for 7 years now at home with an extension cord. I put some butyl tape around the connection between it and the extension cord. When traveling, I take it with me and use at cg when not needing my a/c. If a/c is needed I use the factory 30 amp removable cord. This saves wear and tear on the larger removable cord and is much easier to stow when cold. Also when staying at "tent" sites there is only a 15 amp service so it is nice to have both choices.
Due to the pandemic, my life now exists of only 3 days, yesterday, today, and tomorrow. Everything else has been forgotten!