billybrat,
I have my batteries inside the house. Which requires sealed batteries. My house batteries, four 6 Volt golf cart batteries, are in the hanging locker. My start batteries are behind the Refer. If you don't want sealed batteries the start batteries can be located in the compartment aft, one on each side. A problem with that is if you have to service the pumps or the electrical connections the battery has to be removed.
Gene