In my yacht I have a dual engine installation. Originally the boat builder connected both alternators to the house batteries and put a zener diode as a separator between house batteries and starter batteries. Both sense cables from the alternators are connected to the house batteries. Both engine starts from the single starter battery pack.
I am now looking att installing Argo FET for a better separation solution, but the question arises directly. Should I use one or two Argo FET, is it enough with one Argo FET and connect both alternators to it or should use one Argo FET per engine and alternator.
The goal is to have both engines charging both battery packs.
Any input here would be much appreciated!