Just do it whole-house and don't run the air or MW. No sub.
Canned answer:I'll offer an overview of inverter installation.
There are 2 ways it's done: energizing specific circuits, or energizing the whole coach. The first consists of using a subpanel (another electrical panel with breakers), the second uses no subpanel.
As you might imagine, the first is more 'foolproof' (you don't invert your air con circuit) but, much more work to install. The second is easier, and is like plugging your coach into a generator. The inverter becomes just another AC source.
My inverter is done the second way, called whole house. The best part of this install ( I have a Prosine 2.0) is the circuit protection provided when you're on shore power. I have surge and sag protection, and even bad frequency protection. That's a life-saver when you're in a park with questionable power. The inverter becomes the power police for your entire coach.
The downside is whenever you're invertering you must ensure the air and HW are off. But, isn't that what you'd do if you plugged into a generator?
Here's a schematic:My system schematic
