Amps and Volts

[McGillicuddy]

Being electrically ignorant, I wonder if some of you more omnipotent, and electrically accomplished skippers can offer a little insight as I rewire my '72 Seafari? For now I'm running an '83 115hp "tower of power." It's my understanding that I might be getting about 9 amps (not sure of this either) back to the batteries from this alternator/stator circuit. Armed with this information, does it make sense to hook up a Blue Seas auto charging relay w/starting isolator for seemingly nominal gain or should I spend that extra hundy on a bigger, better deep-cycle battery for my house power? Also, should that house battery be moved fore, like into the cuddy or helm area running heftier cable back to charging circuit? Solar battery charger of any use here? Thanks! -- Gillie