Car Battery for post-season bot

[EricRobodox]

I cant find any lartger CIMs that will work with 12V. I found some at 24V, but i dont know if i can use Victor 883's, we have a lot and want to use since we cant use them in comp anymore. I dont want to blow the speed controllers out. The robot, kart, im looking at weighing about 90 pounds max. and the person weighing about 200 pounds max. So it needs to be able to push 300 lb. Of course, im using two motors. but i need to know if i wont blow up the victors.

Ken, does that attach to the wheel to recharge the battery while it runs? Im very new at electronics outside of FIRST and guitar electronics. That will charge the 12V battery, but if i get a 24V, do they make them?