This is what I use on my boats and as an option of our equipment. Charges your battery as you drive. Can have up to 3 leads for charging three batteries plus your starting battery. Can also add a AC charger to the pack (pro pack) for charging when you get home and park. I added one to my tournament boat and never had to charge my trolling motor batteries again!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

http://stealth1charging.com/

Hope This Helps!

AC