If you are using a lead acid battery you should put the battery in a case. If it is in an aluminum boat and it leaks it will eat through the aluminum hull. Also vent the battery storage chamber to prevent build up of hydrogen and possible explosion when the battery is charging, if there is an electrical spark from a loose connection.
Nice feet...... Great job, lots of great ideas used here. Love it. My wife is gonna probably be calling you, if she starts yelling at you complaining about all the my I am spending, SORRY. Its your fault. Cheers.