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Old     (hunter660)      Join Date: Aug 2007       03-18-2010, 2:45 PM Reply   
I just bought two new Deka DC31DT batteries for my boat. Do I need an isolator for them? I know what it does and how to hook it up, I'm not looking for that. I just want to know if it is needed with two identical batteries that are both brand new. Thanks.
Old     (camassanger)      Join Date: Oct 2009       03-18-2010, 4:46 PM Reply   
not "necessary" - but highlyl recommended. Automates the separation of the batteries and ensure each gets the charge it needs from the alt.
Old     (mhunter)      Join Date: Mar 2008       03-18-2010, 5:52 PM Reply   
It depends on your install. Did you wire them in parallel just to have more capacity ? Or is one foe accessories and the other for starting?
Old     (hunter660)      Join Date: Aug 2007       03-18-2010, 5:54 PM Reply   
I plan to wire them in parallel. They will both be used for everything.
Old     (justintime)      Join Date: Mar 2009       03-24-2010, 1:25 PM Reply   
use an ACR
Old     (hunter660)      Join Date: Aug 2007       03-24-2010, 1:26 PM Reply   
Acr?
Old     (hunter660)      Join Date: Aug 2007       03-26-2010, 5:19 PM Reply   
I need a switch between my stereo batts and the 1314.
Old     (polarbill)      Join Date: Jun 2003       03-26-2010, 5:35 PM Reply   
Quote:
Originally Posted by hunter660 View Post
I need a switch between my stereo batts and the 1314.
I am starting to get confused now. It goes to show you there could be a million possibilties on how to correctly wire this stuff.

To answer this question and the question before. You could, but don't need to put in the switch between the starting battery and the 1314 on the positive side. This means your charger would never charge the starting battery if the switch is disconnected which in theory should be ok because you should always have a fully charged starting battery. Then if at any point you upgraded to a dual bank charger you wouldn't need to change anything.
Old     (hunter660)      Join Date: Aug 2007       03-26-2010, 5:54 PM Reply   
Crude, but what I had in mind.

Old     (polarbill)      Join Date: Jun 2003       03-26-2010, 7:08 PM Reply   
Looks ok. I would move the disconnect switch to the other side of the 1314. Also connect the negative on one of the stereo batteries to the negative of the starting battery.
Old     (hunter660)      Join Date: Aug 2007       03-26-2010, 7:19 PM Reply   
All grounds will be connected together and run to the block. If I move the switch, won't the 1314 make contact durring charging? Is it NO or NC?
Old     (polarbill)      Join Date: Jun 2003       03-26-2010, 7:34 PM Reply   
No, because the 1314 only senses off battery 1.
Old     (espritv8)      Join Date: Dec 2009       03-29-2010, 2:46 PM Reply   
john, with this setup, will the alternator charge both banks?

If it doesn't, I might just do that on my boat, just to make sure my 65amp alternator doen't get toasted charging those big batteries, while listening to music.
Old     (polarbill)      Join Date: Jun 2003       03-29-2010, 3:28 PM Reply   
Quote:
Originally Posted by espritv8 View Post
john, with this setup, will the alternator charge both banks?

If it doesn't, I might just do that on my boat, just to make sure my 65amp alternator doen't get toasted charging those big batteries, while listening to music.
Jonathan, I am guess you didn't read the thread because it is kind of explained. The 1314 will connect and disconnect the 2 banks automatically to charge the stereo bank in stages so your alternator isn't getting fried. If you had a battery disconnect switch in between the 2 banks you could manually disconnect and just leave your stereo bank as a stand alone bank then.

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