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Old 11-20-2013, 10:29 PM   #1
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Dual battery suggestions.

Wanting to run dual battery for safety reasons. Any suggestions, links or info for doing this in a 2012+?

Best kit I have found here: JK Dual Battery Kit

Pieced together kit here: 2012 Wrangler JK Dual Battery upgrade - JPFreek Adventure Magazine

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Old 11-20-2013, 11:22 PM   #2
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The genesis kit is the best kit out there for the JK. It is engineered to an insane level of detail and care. I will definitely be adding their kit to my rig. As for battery choice, I will be going with a sears die hard. Great batteries, and are easy to find in a pinch in the US.

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Old 11-20-2013, 11:31 PM   #3
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Wow. Those are some wild install instructions.
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Old 11-20-2013, 11:39 PM   #4
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Wow. Those are some wild install instructions.
They sound a lot more complicated than they really are. They are very detailed, hence they sound wild. I can't tell you how many times I've seen manufacturers make instruction manuals seem 1000 times simpler than they are...like "remove battery, remove OEM tray, install new tray." Sounds simple, but you quickly see its BS. They make it very simple to follow, just a lot of steps. Take your time and keep the beer cold, and you'll be golden.
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Old 11-20-2013, 11:41 PM   #5
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I agree. Maybe wild wasn't the correct word to use. The instructions are very detailed. Just a lot of stuff to remove.

This has been on my mod list for a while now.
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Old 11-20-2013, 11:54 PM   #6
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The price isn't bad either, especially for a tray that well designed. A lot of other "kits" for $150 are just trays. The money is in the wiring and the isolator, which is expensive. Its one of the best engineered products I've seen for the jeep period.
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Old 11-20-2013, 11:56 PM   #7
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I last researched this mod over a year ago, back when no solution existed for the newer rigs.
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Old 11-20-2013, 11:59 PM   #8
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I last researched this mod over a year ago, back when no solution existed for the newer rigs.
This thing is definitely on my list. Just looking at how they put in grab tabs for all three major batteries (Odyssey, DieHard and Optima) tells me someone really put some thought into this.
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Old 11-21-2013, 12:43 AM   #9
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I can't tell you how many times I've seen manufacturers make instruction manuals seem 1000 times simpler than they are...like "remove battery, remove OEM tray, install new tray." Sounds simple, but you quickly see its BS. They make it very simple to follow, just a lot of steps.
Yeah that is a common theme on most products today. Simple pictures any idiot could follow... expcept this one sometimes!
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Old 11-21-2013, 12:44 AM   #10
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This thing is definitely on my list. Just looking at how they put in grab tabs for all three major batteries (Odyssey, DieHard and Optima) tells me someone really put some thought into this.
Did you find any install threads on this?
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Old 11-21-2013, 01:27 AM   #11
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Hi All members,
I'm from Cape Town South Africa and have a JKU Sahara 4 Dr on order. I want to know if any of the owners ever installed a dual battery system ( Optima Yellow Top ) under the rear passenger seat and if there is room for it. My ARB compressor the will install under the drivers seat.
Thanks
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Old 11-21-2013, 04:44 AM   #12
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I have a yellow top under my front passenger seat with a 3 way controller. Works great for me.
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Old 11-21-2013, 09:20 AM   #13
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Originally Posted by Bekker View Post
Hi All members,
I'm from Cape Town South Africa and have a JKU Sahara 4 Dr on order. I want to know if any of the owners ever installed a dual battery system ( Optima Yellow Top ) under the rear passenger seat and if there is room for it. My ARB compressor the will install under the drivers seat.
Thanks
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I doubt you will find a person that will do this. If you install a battery under the rear seat (presumably you are doing this on an overland rig, otherwise, why dual batteries) you won't be able to put the rear seats down...which kills space, so I don't expect anyone to be doing this.
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Old 11-21-2013, 09:40 AM   #14
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I vote for under the hood if possible. We're already low on space in the cab so anything I can mount under the hood or outside the vehicle makes for more space inside.

Just my 2 cents.
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Old 11-21-2013, 10:21 AM   #15
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The Genesis kit is well thought out I just wished it was more in my price range. By the time you add 400-500 worth of batteries you have a chunk invested. No doubt it would be worth every penny when you were in the middle of no where having to winch like crazy tho.
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Old 11-21-2013, 10:32 AM   #16
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The Genesis kit is well thought out I just wished it was more in my price range. By the time you add 400-500 worth of batteries you have a chunk invested. No doubt it would be worth every penny when you were in the middle of no where having to winch like crazy tho.
Most kits will be almost as expensive. Can't count the battery cost since any kit requires them. Once you add the wiring, the isolator and the bracket, most kits will be in this ballpark but not as well designed.
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Old 11-21-2013, 10:38 AM   #17
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My dad just keeps a spare charged and throws it in the back when he takes a trip. Not best solution but it works.
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Old 11-21-2013, 10:44 AM   #18
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Most kits will be almost as expensive. Can't count the battery cost since any kit requires them. Once you add the wiring, the isolator and the bracket, most kits will be in this ballpark but not as well designed.
yup like I said I wish it was in my price range because the darn thing just don't work well without good batteries so I have to include them in the cost cause I would need to buy them. Just don't want to spend that kind of money at the moment, as I need bigger guns for the bear problem we are having lol.
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Old 11-21-2013, 10:58 AM   #19
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I have a yellow top under my front passenger seat with a 3 way controller. Works great for me.
Do you have a pic of this set up? How is there enough room?
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Old 11-21-2013, 12:26 PM   #20
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Do you have a pic of this set up? How is there enough room?
I would a$$ume he has a yellowtop laying on it's side.
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Old 11-21-2013, 01:04 PM   #21
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Did you find any install threads on this?
There is an install thread over on jeepforum.com

Genesis Offroad JK dual battery install - JeepForum.com
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Old 11-21-2013, 04:32 PM   #22
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Is there anything like this for a TJ (with all the wiring and crap included)?

Would be a great Christmas present for my dad.
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Old 11-21-2013, 04:58 PM   #23
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Do you have a pic of this set up? How is there enough room?
Sorry no pics on my phone and I won't be around my jeep for several days.
I pulled the seat, layed the battery on its side, staped it down and wired it up.
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Old 11-22-2013, 01:36 AM   #24
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I put the second battery inside the draws i made in the rear cargo area. Not including the battery the set up cost me $120. Nice and cheap. Not sure if they ship to America but you could try. System is easy to install and comes with everything you need. If you don't have draws you can buy a battery enclosure to put in your cargo area. At least with a second battery in the cargo area you can use it to run lighting, compressors etc without going under your hood.

Dual Battery System & Dual Battery Kit Wiring

I only spent another $180 on the second battery. It is only there to run some back up/camping lights and in case of emergency. No need to spend a fortune on that.
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Old 11-22-2013, 06:31 AM   #25
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They sound a lot more complicated than they really are. They are very detailed, hence they sound wild. I can't tell you how many times I've seen manufacturers make instruction manuals seem 1000 times simpler than they are...like "remove battery, remove OEM tray, install new tray." Sounds simple, but you quickly see its BS. They make it very simple to follow, just a lot of steps. Take your time and keep the beer cold, and you'll be golden.
There used to be a couple of old subaru shop manuals that had this gem "remove engine, change spark plugs"
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Old 11-25-2013, 06:51 PM   #26
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The Genesis Kit is the best bet. I run the MORE tray, and use the same isolator that Genesis went with. I wish the MORE kit came with a metal strap down system, rather than the straps. I had their first gen with the plastic buckles, then they switched the straps to a more rugged version but the big metal buckle on that always makes me uneasy. There is no good place to put the isolator with just the tray. You have to fab your own bracket and bolt it to the feder, but this only provides support on one side where it is bolted, so its not as secure as it could be. With the batteries only being held with the strap, in a rollover, they could bend that out of place. With the genesis kit, I wouldn't worry too much if there was a rollover, as it looks like everything would stay in place nicely. They did a great job with it. If my solution wasn't already dialed in just right, I would consider changing again. I have had duals in my 2012 since before any of these kits came out. I even have an old tray that was half delivered from Benchm**k Designs, who I guess belly flopped and took a lot of people's cash with them including mine. But the MORE system works, don't get me wrong. But, the Genesis kit is just premium and way less hassle.
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Old 11-25-2013, 06:54 PM   #27
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Also, for those running batteries inside their vehicle, make sure you are properly venting those batteries! Some manufacturers offer vent kits. Even if you bought your battery, some have blow off valves that are accessible. Like the yellow top optimas have little valves where they vent under the black dots at the top of the battery. Find them, and find an adequate tube to run to the exterior of the vehicle. Silicone up that connection to make it tight, and vent it outside. At least this way, you won't be breathing in toxic fumes. Still, in an accident, you would want things that can potentially explore in the engine compartment if there is any way possible to do that. But, sometimes it just doesn't work out.
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Old 11-26-2013, 07:48 AM   #28
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I have the MORE dual battery tray, but I mounted my twin arb in it, not a second battery. I have no issues with the quality, but like I said, I don't use it for its intended purpose & its modified.


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Old 02-22-2014, 12:47 PM   #29
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I installed the Genesis kit with 2 Odyssey batteries yesterday. A project that I thought would take about 3 hours ended up taking 7...and I still need to do some tweaking. While the Genesis kit is the best dual battery kit available, it is not an easy install. I installed dual batteries in my '03 Rubicon and it took about 3 hours...even with having to wire the isolator. That was easy. The Genesis kit is prewired so all you have to do is hook up the cables to the batteries. But as is the nature with modern vehicles, nothing is easy anymore. It seems like the JK has everything but the muffler attached to the OEM battery tray.

The two biggest problems that I encountered were muscling the factory harness into a new location and removing the connectors from the factory fuse/relay box. There were 2 connectors on the box that absolutely would not come off...even though the Jeep is virtually new...only 3500 miles. However, it turns out that you do not need to remove all of the connectors...despite what the instructions say. I was able to get the box up onto the fender and out of the way without removing the 2 stubborn connectors. Five out of the 7 connectors to the fuse/relay box were removed.

I thought it would be difficult to get the OEM battery tray out once everything was disconnected. However, that only took about one minute. I pulled it out from the front, not from the back as the instructions recommend.

The factory wiring harness is extremely stiff. I had trouble relocating it so that it did not put pressure on the oil dipstick tube, re-located evap solenoid, or the engine cover. When I finally got around to re-installing the engine cover by the light of my headlamp, I discovered the factory harness was in the way. I used considerable force to bend the harness away from the engine cover and, in the process, almost levered the connection off of the cranking battery. I may still trim the engine cover just a bit.

You might want to have a set of battery terminal spreaders if you plan to install this kit. I was unable to get the negative terminal all the way onto the cranking battery. I will have some terminal spreaders Monday and will feel better about the install once the terminal is all the way onto the post. It would be nice if they opened up the terminals a bit before shipping the kit. The terminals are very heavy duty and pretty much impossible to bend without terminal spreaders.

All in all, I've got to say that I'm very pleased with the kit. I installed it so that I can run my 60-qt ARB refrigerator without having to worry about a dead cranking battery. The Odyssey batteries are about 8 lbs heavier than the OEM battery, so you end up adding somewhere in the neighborhood of 70 lbs under the hood. Final cost was $1035 ($497 for the tray with shipping and about $269 per battery from Amazon).

There are cheaper alternatives for both the tray and batteries. However, the Odyssey batteries are the best (same as Sears Diehard Platinum, or used to be anyway) and it is very nice to have the isolator pre-wired. I'm not sure you'd save that much by buying the isolator separately and wiring it yourself.
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Old 02-22-2014, 01:15 PM   #30
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I have the MORE dual battery tray, but I mounted my twin arb in it, not a second battery. I have no issues with the quality, but like I said, I don't use it for its intended purpose & its modified.


Attachment 545810
I have been wanting to ask if anyone used a Dual tray and single battery for the purpose of getting more room but I did not wanna ask was just looking..

Really cool set up, I was looking to do this same tray and put my OBA stuff there but changed my mind.


Also OP:

If you are any good with wiring and all that stuff you could buy a lesser expressive tray like M.O.R.E and do your own set up. Here is a link for the electrical goodies you might need.

Automotive and Heavy Duty 12 & 24 Volt DC Electrical Components

I am considering building my own as it is really only some wiring and a high amp solenoid which you can buy linked above. Thinking if I do my one I could also put in a high amp solenoid for the winch to cut power to it when not in use.

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