Have you thought about 4 of these in a 2 Parallel + 2 Series (2x2) config?
http://www.2zo-rc.com/ Should be about 94A @ 24VDC
Thats an interesting idea but one of those is what I paid for the 24v. It would also be 47A @ 24v
Good point, they do appear to be more expensive than your setup (to get 24VDC)
(For the record, I was suggesting 4 total with 2 pairs in a series.)
One is 47A @12VDC
Two in parallel = 94A @ 12VDC
Two parallel pairs in series = 94A @ 24VDC