Found one on there that would fast charge and trickle charge on three banks, it's almost $500.00 but I guess you get what you pay for. Thanks for all the great advice everyone.
I know that boats and airplanes are holes into which you pour all of your money but...
I would consider many other solutions before spending 500 bucks to charge my boat batteries. One thing I might consider is using an automotive charger that I already owned, powered through an appliance timer. But my charger wouldn't go directly to the batteries. It would go to a distribution board with diodes and fuses for each battery. The anodes of 3 diodes would be connected to the trickle charge source and serve as blocking diodes while the cycle charger is energized. The cycle charger's output would also route through blocking diodes to the individual fuses. I would pull the fuse for a battery that wouldn't get connected. There are many other possibilities.
Joe
