I think Ghost Grab is asking for the easiest way to put in a house battery and a starting battery on separate circuits (I'm sure he'll discover they are separate when he performs FSMike's simple test), and have it work. But GG, please correct me if I'm presuming wrongly.
I get the idea he doesn't really want to upgrade a bunch of equipment
, and isn't electrically inclined, and will be happy if he can avoid doing much more than just swapping out the batteries, hook them up intelligently, and have a simple protocol for using the system as is.
I think I know a few things he will need to know:
Maybe if someone can talk him out of the starting battery idea, and just tell him how to use the 1-2-Both battery switch to do everything with two fresh deep-cycles, he'll be happiest.
- whether the alternator is wired through the battery switch, or directly to one battery.
- whether or not the battery switch position can be changed between the 1-2-Both positions without losing contact and potentially damaging the alternator.
- depending on the answer to #2, can that switch be used to to start the boat and keep both batteries charged.
- depending on the answer to #3, does he need to purchase some kind of battery combiner or EchoCharge device?
I mean, he may just want to day sail.