I hope you've got this all figured out by now. It took me awhile to get my head wrapped around it when I got my chateau 24F last year. All 3 of my batteries were/are crap. I'm looking to probably replace the chassis battery in the next month. House batteries are just about shot too, Not only where they cheap but I let them go pretty damn dry last summer because I didn't realize there was a baffle in them that kept me from seeing the cells. In the bad light under the steps I didn't notice it and it looked like they were full.
The 28A looks like a great floor plan, I'm kinda jealous, The 24F is super spacious but the bedroom/bathroom/kitchen are much nicer on the 28A.
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