[Richard]

I don’t know if this will help you or not. And this is something that @"RussWhite" implemented. When I saw it, I thought it was incredibly creative. 

Russ has a Progressive surge protector hardwired in the shore reel bay. Those protectors have a remote that uses a standard telephone connection from the protector to the remote.

He used the existing telephone circuit that Newell wired when the coach was new to carry the signal from the protector in the power bay to the telephone connection by the door. He mounted the remote display right by the door. It continuously cycles through the voltage and amperage readings for each leg. 

The big thing to be aware of in this setup is that it would not monitor voltage and amperage from the generator unless you wired the surge protector after the xfer switch.