I don't know if there would be adequate depth for batteries underneath the rear seat like my box. The box is about 8 inches hanging down under the body floor. I am sprung over and have more room than a stock height cruiser. I had often thought of building a water tight box for each battery and installing them in the void behind the front wheels in that cavity that likes to rust through our fenders. It would keep the weight low for us that like to test the side hill limits of our trucks. I have not yet taking action on this idea, just mental design. Also I have changed to Odyssey batteries that are smaller than a group 27 and probably even a group 24. Those would fit into that spot even easier. Maybe someday I will get around to that project.