Originally Posted by jjustj
12 volt class 24
12v in automotive sizes like gp24 are really tough to find in high end, true deep cycle batteries. Most all have switched to making 12v as marine starting or combo batteries and will not have the life of a the best deep cycle designs.
In Trojan, I think the MTX 24 would be the best choice from what I have heard. We had some Trojan SCS series batteries in 12 and they were not anywhere near as durable as the Trojan golf cart 6v batteries we had.
You could also try Crown batteries, who make lots of commercial batteries including 12v for floor scrubbers and electric pallet jacks. They might have something in 24v that is good. You would have to call them, though, it appears because they want you to give all your personal information on the website just to get specs these days.
If you can't find high end true deep cycle, then a combo battery from Costco like the DC24 would probably be a reasonable cost option.