3rd Battery
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RE: 3rd Battery - 5/16/2008 10:29:55 AM
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cumminalong
Posts: 2800
Joined: 7/12/2006
From: Swollen Beaver, OR
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Best bet would be a marine isolator.
Mount the spare battery to a frame rail, run the wires and you'd be all set.
As long as you keep it parallel, you shouldn't have any issues.
Just make sure that it's the same type of battery as the other 2 in the truck, otherwise the weakest battery will draw off of the other two when they are being used / connected together.
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RE: 3rd Battery - 5/16/2008 10:56:33 AM
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reed
Posts: 308
Joined: 12/6/2006
Status: offline
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Are you suggesting running all the 3 batteries in parallel?
quote:
ORIGINAL: cumminalong
Best bet would be a marine isolator.
Mount the spare battery to a frame rail, run the wires and you'd be all set.
As long as you keep it parallel, you shouldn't have any issues.
Just make sure that it's the same type of battery as the other 2 in the truck, otherwise the weakest battery will draw off of the other two when they are being used / connected together.
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RE: 3rd Battery - 5/16/2008 11:10:10 AM
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cumminalong
Posts: 2800
Joined: 7/12/2006
From: Swollen Beaver, OR
Status: offline
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quote:
ORIGINAL: reed
Are you suggesting running all the 3 batteries in parallel?
You'd have to in order to charge it, unless the isolator has a dedicated splitter to it.
Most of them are Bat 1, Bat 2, Both or Off.
Usually Bat 1 is your starting battery(s), Bat 2 is the trolling motor, Both is to charge and Off is self explanitory.
The only thing running them all together is gonna do is increase your available amperage. It's not gonna increase voltage (which would be bad), all it's gonna do is spread the load across more batteries.
Just make sure it's not in series or you'll fry your eletronics.
I would seriously check with a local marina, if you have one. This is a pretty common setup on boats.
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RE: 3rd Battery - 5/16/2008 1:36:01 PM
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agargano98
Posts: 327
Joined: 12/17/2007
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wiring in series will increase voltage and maintain amperage, run in paralell will increase amperage and maintain voltage.
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2007.5 Ram Mega Cab SLT
3500 SRW Diesel 6.7L
Inferno Red
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RE: 3rd Battery - 5/16/2008 3:40:36 PM
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reed
Posts: 308
Joined: 12/6/2006
Status: offline
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Here is more what I had in mind. The isolator which is normally meant for a dual battery setup, 1 output of the isolator would feed the parallel current setup, the other isolator output would feed the 3rd battery. The 3rd battery could run all the way dead without affecting the ability to start the truck:
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