Ok.I guess here is the real question. After modifying the compartment so the genset will fit in there why not just pull it out start it and plug it in. As you said in your post “its just for back up in case the solar dont work out”.
I look at your pictures and all I ask myself is why? You still need to go out and start it, you still need to pull it out to fuel it, you still need to pull it out to service it, you still need to get out open the door and run an additional fan in front of the door.
What is the gain here?
The benefits of a built in genset are.
Uses same fuel as the coach (propane for a camper). No need to carry additional gas
You start it remotely inside
It’s tied to a transfer switch so you can back feed the outside shore power connection
Your installation has none of these benefits. Yes there are some big negatives to an onboard genset that campers use but none of those are safety negatives. They are approved,vented,and exhausted to prevent any potentials for loss of life.
Just some food for thought.
