Any electricians in the house?

Well it ain't quite that simple. Required BY LAW to have the switching system interlocked so that emergency power and grid power CAN NOT be accidently interconnected
Yep, I wired up a Gen, no solar involved, there is an Interlock, I had to drill the panel a Lil, BUT, I liked it! The way You CANNOT switch till the main is OFF is cool... Great Deal