Charging Your Boat Batteries & Setting Up Your On-board Charger
TRITON 1877596 BOAT BATTERY SWITCH PANEL W/ VSR
BEP MARINE 722-KS GRAY PLASTIC MOTORIZED BOAT BATTERY CONTROL SWITCH PANEL
Minn Kota MK-315D On-Board 12V Marine Boat Battery Charger 3 Bank x 5 Amp MK315D
NEW Minn Kota 4-Bank Boat Battery Charger E-Drive Torqeedo Ray Electric Motors
Solarparts 1PCS 100W flexible solar panel 12V solar cell/module/system RV/car/marine/boat battery charger LED Solar light kit .
Solarparts 1PCS 75W flexible solar panel 12V cell system kits DIY yacht boat marine RV module car/RV/boat battery charger Sunpow
100W Watt Solar Panel Mono 12V Volt for Off Grid RV Boat Battery Charge Germany
Wooden Paddle Boat | Bella Luna | $6.95 (I could probably just make this pretty easily.)
http://www.pontoonboatpartsandaccessories.com/pontoonboatbatteries.php has some info on boat batteries and how to install them.