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Old 07-20-2017, 09:40 AM   #1
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House Battery Mounting Location

I need some help figuring out where to mount my house batteries. My rig is a 2006 E350, 2wd. I've got two Lifeline Group 31XT batteries I want to mount on the frame. I can't decide between mounting the batteries on the passenger side frame below the barn doors or behind the rear axle in the center of the van.

I believe they can fit in either location but I'm debating the pros and cons of each. My electrical gadgets (Blue Sea ACR, Breakers, DC Panel, etc) will be mounted below my bench seat or directly behind.

Option 1: Passenger below barn door: Shorter cable run, weight between both axles, leaves rear open for water tank, etc.

Option 2: Rear center behind axle, keep weight in middle of vehicle (long axis) but towards the back of the van. Longer cable runs.

I've searched other posts and it's got me where I am but debating the final location. A friend is going to fab up a box for me.

I don't have a photo of the behind the axle location but it would be in front of the spare tire and behind the differential, mounted/supported by both frame rails.

Thanks for you input.





I made this cardboard box to match the battery size.


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Old 07-20-2017, 09:49 AM   #2
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I did mine like your box mockup. Works great. Fairly well protected and easy to get at if needed.
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Old 07-20-2017, 09:50 AM   #3
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Right now I don't have plans for 4x4 conversion, rear mounted spare, etc.

I would like to add a lift and better off-road capabilities but that is way down the road.

Not sure if that would sway my decision for either location.

Justin
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Old 07-20-2017, 02:19 PM   #4
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That's the best place I know of. First, nothing else fits well there but batteries do. Second, it leaves the left side open for propane, the best place for it, if you go that route. Also leaves the rear open for tanks, box or whatever. Short cable runs are another benefit. I've put several in this location.

Here are some more ideas. There are a few threads on this.

http://www.sportsmobileforum.com/for...ded-14842.html

http://www.sportsmobileforum.com/for...unt-18859.html

http://www.sportsmobileforum.com/for...pics-8790.html
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Old 07-21-2017, 11:51 AM   #5
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You might consider the idea that you might want a larger set of batteries down the road. I did and thankfully there was enough room in front of my underfloor storage to add another 4D battery. On my diesel the starting batteries are under the side barn doors. At any rate, easy access to the batteries (where ever you put them) is a good idea if you can build it that way. It's kind of a PITA to drop mine just to check the connections.
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Old 07-21-2017, 05:40 PM   #6
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Insulate well! Don't want them to freeze/lose power/longevity!! I am sure there is a thread and pics somewhere on here lol!!
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Old 07-25-2017, 02:02 PM   #7
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The frame rail is a great spot. We have two group 27 mounted there but the group 31 will fit even better.

We mounted ours on their sides to increase ground clearance. Fairly easy to remove with a floor jack.

If you want steps or running boards make sure to leave room.
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