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Rear Mounted Batteries

MNorby

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Anyone here running there batteries in the back of their outfit? Did you use frame as ground or second cable? I am using 2/0 for the power to my ford starter selinoid and use the selinoid as a J-box to mount my winch and cab power cables to.
 
I strongly suggest a dedicated grd..... and venting if needed...
 
is 2/0 enough for a rear battery, even if I did a dedicated ground too? Biggest concern is the winch up front. I could re-build my battery tray (rusted and junk) and keep battery in front and put one in rear? I would just like to free up more room up front and balance weight out back more is all
 
The best cable you can run would be welding cable. 2/0 should be plenty if it's welding cable. I would run a dedicated ground though as ryoken suggested.
 
the stuff I have is labeled "battery cable 2/0" but it has pretty small strands and it was given to me. Could I use a frame ground for the rear battery if I put a battery up front too for the winch and all (rear would basically by an auxiliary)?
 
Welding cable is much different than battery cable. Welding cable litterally has thousands of fine strands of wire. Go to your local welding supply house and ask them to show you what welding cable looks like then you'll see what i'm talking about. Regardless of main battery or AUX battery i would still run a separate ground cable up front. The problem i see with an AUX battery in the back though is that if you say run offroad lights from that battery now you'll have to run the positive wire from the lights all the way to the back to hook it up to the positive on the battery unless you run a battery/welding cable up front to a junction block to make your connections.
 
I know what welding lead looks like, its just that I have this now and don't have to spend anymore on cable if I can avoid it. In regard to the aux bat in rear, it wouldn't be isolated or anything, just there for more reserve and all accessories would run off the front bat.
 
Keep in mind if you want to double the amp hour rating by hooking the batteries in parallel then both batteries must be of the same CCA and size and be of the same age. Don't use one old battery and one new battery or you will kill the new battery.
 
this is formuds if this helps any
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Keep in mind if you want to double the amp hour rating by hooking the batteries in parallel then both batteries must be of the same CCA and size and be of the same age. Don't use one old battery and one new battery or you will kill the new battery.

When I add the aux batt I'll also replace the old junker I found at the shop when I was first getting rig together to "make it run" then and has been in it ever since. I'll replace with the excide orbitals like i have in my 12v.
 
I mounted a pair of batts into the floor behind the front seats of my old 81 Jimmy. I used 1/0 welding cable, and even though it's apparently frowned upon I used the frame as my common ground. It worked beautifully, and I noticed much better cranking speed when starting...likely due to the condition of the old battery cables vs. the new stuff (fine strand monster cable)

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I tubbed it at the same time... :D

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The most immediate side benefit I noticed was all the squeaking and creaking from the front of the truck was gone immediately. I guess those batt's put a lot of stress on the front sheet metal....


Rene
 
this is formuds if this helps any
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Hey who stole my picts.:D

I just ran a cable from one battery to a T on the other one then straight to the frame. You can just ground everything up front, to the frame (Or body as long as it's grounded to the frame) No need to run a ground wire back to the batteries.
On the pos side of things....I ran a cable off one of the batteries to a distribution block on the fire wall, then ran all my accessories off of it. I then ran another cable off the other battery to my winch solenoid pack (Also on the fire wall)

I'm running 2/0 cable on everything. It really helps to have your own crimper...Saves a lot of trips back and forth to get things done.
 
I also used the frame as a common ground. I have ran it this way for several years & have had no problems.
 
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