Quote Originally Posted by dereklschmidt View Post
Ok, I am still confused on how this Add-a-Battery systems works. It looks like to me the alternator does not have a seperate wire going to the ACR or Switch, how does it charge both batteries?

Looks like, to me, from this diagram that I don't have to do anything with the wiring from the alternator. My alternator already has the ground to the post & the power to the starter. If I am reading this correctly I can simply take a Power from the starter and run to the ACR and be done? Is this right?

Please tell me what I am missing in this diagram, just doesn't seem like it would charge both batteries this way, but I may not know how exactly the ACR works. Thanks
Blue Sea has a tech support line and are excellect talk to. You can find their number on the their website. One ten minute phone call and you will have this hooked up.

Your not connecting anything directly to the ACR except for the batteries. You are connecting everything to the switch first. The switch connects to the ACR and to the batteries.

I wouldn't worry about running a seperate wire from the alternator to the switch. Most ski boats wire the alternator to the starter & the starter to the battery. You can ignore the wire in the diagram that shows a wire connecting the aleternator to the switch (this has already been done in most cases).

Take your starter wire (this is the wire that is connected to the battery now) and connect it to the proper lug on the switch. Then connect the switch to the battery from the other lug. You will have to cut & connect new terminals.

Now you can connect the ACR to the switch. This part of the diagram is correct. As long as you leave the switch in the "on" positon, the ACR will allow both batteries to charge at the same time while isolating the power output each battery controls.

The longer you stare at the diagram, the more confused you will become. Call Blue Sea to make sure you are wiring correctly.