I don't think you want to go that route, unless you can find a bigger one. That one, at about 22 amps, is not going to meet your needs. If you do find a bigger one, it's going to cost too much.
Consider the Frank's Voltage Booster
or TRC's Voltage Regulator
(Don't use an iPhone/iPad to look at the Franks site since it uses Flash and you won't see much of the page.)
(If you use the TRC regulator, you also need a separate Surge Guard to go with it, whereas the Franks is all-in-one.)
Oh, and there are no "key components" in an RV that require shutdown unless you are adding them.