Welcome to the Newmar forum gmorse28 & irv2.
Not sure this will help but if you check the winter summer setting on Gen it may be set to winter.
Your battery drain could be caused by poor battery connections on batteries and poor ground cable connections to chassis frame for both GEN and house batteries.
Your Gen starts from your house batteries.
You will have a
B.I.R.D. System that should keep your batteries both house & chassis fully charged if plugged into 110 source.