Use it after every outing and you'll never have battery issues. What kind of batteries are you running. I stuck 5 optimas along that wall you put your onboard charger.
Sorry, this might be dumb, but how does a battery charger work? I usually hook the battery up to a trickle charger the night before I go out, is this ok? how will a battery charger help?
I'm having a problem with my duel blue top optima batteries. They were installed by a good stereo shop last fall along with rewiring the battery selector switch which was apparently not hooked up correctly by another dealer shop. I turned them off for the winter and then put the switch on "all" and hooked up my charger to just one of them a couple of weeks ago before we took the boat out. Long story short, I think only one of the batteries took any charge, and the other battery doesn't seem to be charging even when I run the boat with the switch on all. What is wrong and how do I fix it? Thanks