Originally Posted by Vermilye
When I purchased my 17, the single 12V battery was not on the bumper...
Ah, that's why I was asking... the first Escape 17 I saw (this one
in 2006) had the battery outside, and recent ones do, so I was wondering if they were ever any other way. Apparently so - one of the many detail design changes.
if a 17 (such as Jon's) is from a year in which the single battery was inside and the dual batteries need major frame work (perhaps extension), accommodating dual batteries on the year could be a big deal
if it is from a year with a single battery on the outside at the rear bumper (such as J Mac's), it shouldn't take more than another pair of supports from bumper to crossmember, plus perhaps relocating the spare to toward the middle... not a frame extension.
Other than extension (if it is not already long enough to accommodate one battery), and an appropriately placed crossmember (which a trailer with a single rear battery would have) I can't imagine any other frame change. The frame size (1.5" x 3") is the same either way, and I think the bumper is similarly the same size regardless.