I forgot to mention in my earlier post.....
When I had my 2018 Outlaw 29H, the chassis battery was not charged on shore power.
I installed Trik-L-Start and it allowed my chassis battery to be maintained by the house batteries and charger.
http://www.lslproducts.net/TLSPage.html
It worked great and I never had to keep the chassis battery on its own charger.