This is my attempt to wire two boat batteries in such a way that, depending on switch settings either one, or the other or both batteries (in parallel) power the electric trolling motor (lower middle lamp) which should pull 20 amps. Also, I want to be able to power the running lights (top right lamp, 2 amps) and accessory jack (top left lamp, 4 amps) using either battery A or battery B , regardless of which is powering the motor. I included two diodes to keep the two batteries from trying to charge each other, but that caused a problem. The current through the trolling motor is vastly reduced, apparently because of the effective resistance of the diodes.
Anyone know a better way to do this?
Thanks
