Aspiring Boat Bum
Join Date: Oct 2007
Thanked 10 Times in 10 Posts
Rep Power: 13
First thing is to analyze your electrical usage on the boat. I assume on a 22' boat the power usage will not be great but that depends. Will you be running a stereo, cabin or navigation lights, GPS, plug in cooler? Will you have a motor that is electric start?
Second, due to the size and space restrictions of the boat it will be impractical to install a really large battery bank. So, assuming you won't have an electric start engine and not too many of the options mentioned above I would look for a 12V, Marine deep cycle battery that will fit in the battery space that is probably on the boat.
Before anyone jumps in to yell, that battery will not be a true deep cycle like a Trojan T105 but I don't know of any true deep cycle batteries in the size you will fit in a 22' boat so that will be your best option.