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Old    Pete (petrey10)      Join Date: Apr 2010       04-28-2010, 1:02 PM Reply   
Anybody know if its safe to use an ACR inbetween two banks on an onboard charger? I don't wanna mess my ACR or battery.
Old    Baitkiller (baitkiller)      Join Date: Jan 2010       04-28-2010, 2:19 PM Reply   
The ACR is only connecting the batteries together when charge voltage is present and separating them when a draw is occurring. It cannot differentiate between your alternator and a converter.

So, go ahead, it's OK.
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-28-2010, 6:07 PM Reply   
I use a single bank with my acr to charge both batteries.
Old    Cory McLean (kikitlo)      Join Date: Jul 2005       04-28-2010, 7:20 PM Reply   
I ended up using a dual bank with my ACR. I found that if I had the charger only hooked up to the starter battery, in the "maintenance mode" the house batteries were never combined thus not maintaining them. So now when it charges it combines them both, house and starting, and maintains all the batteries.
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-29-2010, 12:45 AM Reply   
Quote:
Originally Posted by kikitlo View Post
I ended up using a dual bank with my ACR. I found that if I had the charger only hooked up to the starter battery, in the "maintenance mode" the house batteries were never combined thus not maintaining them. So now when it charges it combines them both, house and starting, and maintains all the batteries.
It depends on the maintenance voltage of the charger and the minimum voltage the ACR combines. Mine stays combined even in maintenance mode.
Old    Shawndoggy (shawndoggy)      Join Date: Nov 2009       04-29-2010, 5:58 AM Reply   
To clarify, if using a single bank charger with an acr/switch (ala blue sea add-a-battery), you'd hook the positive end of the charger to the same post on the battery combiner switch that you have your positive from the alternator hooked to, and NOT hooked directly to one or the other battery, right?
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-29-2010, 6:01 AM Reply   
Quote:
Originally Posted by shawndoggy View Post
To clarify, if using a single bank charger with an acr/switch (ala blue sea add-a-battery), you'd hook the positive end of the charger to the same post on the battery combiner switch that you have your positive from the alternator hooked to, and NOT hooked directly to one or the other battery, right?
Just hook it to one of the batteries. After several hours check to see that the light is still on, on the ACR. If the light is still on then they are staying combined during the maintenance cycle. You are then good to go.
Old    Shawndoggy (shawndoggy)      Join Date: Nov 2009       04-29-2010, 6:14 AM Reply   
I guess that makes sense. You'd want to put the charger on your "deader" battery, then, right? I know some acrs (again blue seas in particular) won't recombine if the voltage of one of the batteries drops below a certain threshold (11.7v IIRC).
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-29-2010, 6:32 AM Reply   
I would wire it to the house battery.
Old    Pete (petrey10)      Join Date: Apr 2010       04-30-2010, 10:42 AM Reply   
i have a two bank charger so if i "straddled" the ACR I should have no problems.... I am correct in understanding what has been said?
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-30-2010, 1:44 PM Reply   
Quote:
Originally Posted by petrey10 View Post
i have a two bank charger so if i "straddled" the ACR I should have no problems.... I am correct in understanding what has been said?
You may want to read this.
http://bluesea.com/viewresource/504
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-30-2010, 1:46 PM Reply   
Here is more info.
http://bluesea.com/resources/4
Old    Pete (petrey10)      Join Date: Apr 2010       04-30-2010, 2:40 PM Reply   
well crap... now i am confused again
Old    Ajholt7 (ajholt7)      Join Date: Apr 2009       04-30-2010, 6:09 PM Reply   
Just use one bank of it. If one battery gets too low for them to combine, you can manually combine them with a switch.
Old    Pete (petrey10)      Join Date: Apr 2010       05-03-2010, 8:33 AM Reply   
well without me installing a switch I think I will use both banks and then when I charge I will disconnect the ground on the ACR. This should keep it for combining the two banks and I won't have to worry about anything since the ACR won't be on...

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