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A second battery

A second battery

Postby 1josh13 [OP] » Mar 05 2011, 3:02am

Hi guys

When i open the hood theres an open place for what looks like a second battery, I was just woundering if anyone has 2 batteries in and if so how are they wired? Parallel? Would this affect the alternator having to charge two bats?

If you need to know why, I want to upgrade the electiral systems and also put on some lightbars.
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Re: A second battery

Postby StarsnBars » Mar 05 2011, 3:18am

Dual Battery. This might help ya . I think I copied it right,,,
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Re: A second battery

Postby GMman » Mar 05 2011, 9:49am

I had a 2007 NBS Crew 4x4 Crew, now 2010 4x4 Crew. You can do as poster above or parallel . I use Parallel with 0 or 00 cable, Positive to positive and second Neg goes to Engine Ground. I use side mounts for the connections and have top posts free for communication " high amp draw " cable connections. Up to you.
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Re: A second battery

Postby taphillips2 » Mar 10 2011, 12:46pm

Go here and to a peek too. It is a dual alternator setup that would tremendously help also.

https://www.dcpowerinc.com/brackets-and ... acket.html
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Re: A second battery

Postby TheoLP62 » May 06 2011, 4:43am

GMman wrote:I had a 2007 NBS Crew 4x4 Crew, now 2010 4x4 Crew. You can do as poster above or parallel . I use Parallel with 0 or 00 cable, Positive to positive and second Neg goes to Engine Ground. I use side mounts for the connections and have top posts free for communication " high amp draw " cable connections. Up to you.



Got some pics of that? I know it was your old truck but . . .
I have a plow on my truck and am installing a lightbar, siren, and strobes for the FD response and don't want to fry the alternator . . . not sure if having the plow on during the winter then responding to a call will stress the electrical system.
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Re: A second battery

Postby SilverSurfer » Jun 27 2011, 8:59am

The second battery location was setup for diesels. But you can run one in a gas engine if you want.
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Re: A second battery

Postby bbrown » Sep 29 2011, 8:10pm

I noticed this from a while back but it was around the time that I added a second battery to my truck. The alternator will charge both batteries but there are no real advantage to having 2 batts unless you isolate them from one another with an isolator/combiner (hellroaring.com). Then if one goes bad (dies) you always have a good one to fall back on. BTW, for a 12 volt system, you need to wire them parallel. Otherwise, a series connection will fry everthing with 24 volts... not good at all.
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Re: A second battery

Postby SilverSurfer » Oct 01 2011, 6:33am

Tru dat. If you don't know basic dc electronics you shouldn't even try. I'm just waiting to get a second battery, may have a candidate coming up. I will pic and post when I git'r'dun. Should be soon, kinda waiting for the daytime temps to drop into the 90's.
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Re: A second battery

Postby SilverSurfer » Oct 06 2011, 6:23am

The battery isolator I found appears to be defective, so I won't be installing it.
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Re: A second battery

Postby bbrown » Oct 06 2011, 2:27pm

Hey SilverSurfer, just some advice; I did a bunch of research on bat. isolators/combiners and the best ones for the money are made by Helroaring technologies. here is a link: http://www.hellroaring.com/battery1.php
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