I have 2 502 engines in my boat. I have two batteries for starting ( one for each engine), 2 batteries for stereo and 2 batteries for house 12 volt power. how do I wire all batteries to charge off of the 2 alternators. ( I have one two bank charger for the stereo batt's and one for the house batt's. I need to be able to charge all banks off of the engine
The port engine charges the starting batt and one of the stereo batt.
The starboard engine charges its starting batt and the other stereo batt.
When I have the stereo on while parked I switch the batt selector to 2 on both engines, then to 1 when I start the boat and to both when running.
Right now the house bank is only charged from the on board charger, I would like to be able to start the boat to help charge these when I am on the water away from shore power.