I measured our 2250 Sunseeker just after getting it - the width and length dimensions are fine but the depth is a gotcha. When I measured the GC batteries in our old unit and compared them with the depth in the step well, I found the batteries are within an 1/8" of the underside of the metal lid - not a good thing. Looking at battery sites, I'm finding some are even a bit taller than the available depth.
Before you invest in a pair of golf cart batteries, measure, measure, measure!
I have a couple of ideas for making them fit in the stepwell - but it's going to take a bit of metal work. I plan to drop the floor about an inch. Someday.
Formerly: 2000 Four Winds 26Q/Ford, '96 Kit Sportsmaster 22' 5th wheel, '91 Sunlite truck camper, Wildernest flip-top canopy