I envy you with the location you have for your panel. Ours (2013 2350) is located behind the driver's seat and is a pain to lean down and read if the light is not just right. Paul
Ron, our Xantrex inverter on the wing behind the drivers seat tell me the volt when I turn it on. Don't you have one of these also?
I'm clueless about these things but would it make sense to mount a new battery monitor in the same place as the old one? My brain says all the wires are already there, they just don't feed to a digital display. Even if the wires aren't there, you could run them and just pull out the old monitor since it is useless anyhow. (Though the height might be an issue).I know you'd find a use for all those rectangles over the stove. They will call to you until you use every one.