I'm about to start my first rental property and has solar panels. 

If not, you could use an electric water heater since it doesn't require venting (although would require a 2 poll, 30amp breaker in your panel). 

Keep in mind that's 2 kitchens, at least 2 full baths, 2 electrical panels, 2 HVAC systems, 2 water heaters, etc. 

I want to make it from insulated panels.

Property had been flipped with contractor-grade kitchens a few years prior to purchase...so everything was pretty much turnkey, minus a new electric panel needed to add second washer/dryer hook ups in the basement.

Also, FRP panels on bath walls. 

I think I understand, they cut a number of wires, all within 5' of the breaker panel.

Going through inspection on a duplex and need to replace both electrical service panels.

If not you will probably need to make a wall with door from the left fin wall of the bottom stair to the wall above it so that is a safe exit in case of a fireYou would also need to make sure you have room on your electric panel or pay for another electric meter and panel

They also are single panel and few insulation issues as some of them have gaps between the window and casing.