One last question can I leave the batteries in the motor home over the winter? We live in Denver so it does get below freezing sometimes.[/QUOTE]
I'm not qualified to comment on your other question, but leaving the batteries in the MH over the winter will not be a problem at all as long as the fluid level is up to the full mark and they are fully charged.
However, if you do decide to store them inside don't set them directly on a concrete floor, there is always a remote chance of acid leaking out (sweating) and causing damage to the floor.
2013 RAM 3500 Dually Longhorn
2014 Trilogy 3650RL, W/D, Onan 5500, 8000# Axles, IS, 960 Watt Solar, 6x6 Volt Battery Bank, Freedom SW 3012 Inv/Charger