Welcome to the forum.
In this link
you will find info on your battery charging systems which would be the BIRD System
in your coach. As long as you have all your batteries correctly wired you should be able to have fully charged batteries when shore line is plugged in or charged by alternator when driving or Gen running.
We have another active North Star owner on forum so you can compare notes and you can access his links, because I think he had the same problem when he showed up here.
Help in getting around irv2.