UPS for a device with a built in UPS, hmmm. Nah, none for me, thanks. If something is likely to die, I'm thinking it will be the brick. They're a dime a dozen these days. Get a powerstrip with surge protection if you really think you need it.
The last time I actually needed surge protection for my computer was over 20 years ago, when lightning struck a powerline, which definitely did ruin my day. As already pointed out, brownouts are more likely and the brick will deal with that fine. It's the rest of your RV you probably need to worry about.
