Hardwired
One more thing to fail that would be a trip ender (unless there is a way to wire around the unit)
Portable allows you to risk the unit rather than risk the RV
It would be better to test under load before plugging in the RV.
I know it is easy to get lazy about checking such things.
Unless you can DIY extra cost to have an electrician do the install.
If the unit fails under warranty--another charge to remove it unless one can DIY
That said, I think if I were going to get one I'd go with the Hughes.
My own choice is to always be able to "patch board" around electrical items. It has saved my bacon a few times.
