Okay, I think the best way to go about this would be a seperate EM panel. I'm assuming the circuits that go into this panel will be fed normally through normal AC power that goes through the Transfer Switch. Then if power goes out, the generators are cranked up and the EM panel is then fed and those circuits.

Normally is there some type of switch in the transfer switch that you manually switch when you go to generator and then back again?

Thanks