Agreed. Our 2020 Kountry Star had 10W factory solar connected to chassis only.
You have a battery isolation manager (BIM) that should, if working properly, prevent the solar panel from also charging the house batteries. I make that side comment since both our 2020 Kountry Star and 2022 Dutch Star have failing BIMs that I have on my warranty repair list.
I like to look at my battery levels every time I get in the coach in order to understand the patterns during different usage. DW says I check batteries and tank levels more than my I-phone. Old habits.
You can also confirm this in your owner's manual.
2022 Dutch Star 4369 FL Towing 2022 GMC Sierra 1500
Chris & Lee, Finnegan & Kirby (Double Doodled)
2020 Kountry Star 3709 towing Equinox.