Thank you all gentlemen. I appreciate the input.
Roy B., King George, very beautiful area! I have friends that live there and I very much enjoy the ride down 301 to 17 to Va Beach. HATE trying to take I-95 to 64!
May I pick your brain some more? I am not so worried about charging the chassis battery as I rarely plug my unit in. I boondock for the most part, and when I am not on the road I remove both batteries and maintain them on a trickle charger. I also have a beefed up, 175 amp alternator that charged the coach battery fine for the most part until this part failed or whatever. What would you suggest for a simple coach battery charging circuit for charging while on the road that would keep the coach battery charged but not allow it to drain the chassis battery. Just a manual switch?