DIYed this in our last fifth wheel.
Had a separate battery bank for the inverter.
Ours was a 2000 watt system.
Had fun wiring it in and refining it.
The convertor was problem because I had to unplug it till I got the off switch for it installed.
My cons were:
Expense
Convertor issue
Locating inverter
Batteries ran down somewhat quickly.
2000 watts was too much or not enough.
I'd probably do it again with a smaller pure sine inverter if I could just dedicate the source to 3 or 4 specific outlets (bedroom and entertainment center).
