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PostPosted: Sun Oct 23, 2016 12:41 am 
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The alternator died on my Bronco earlier this week. While swapping it out this afternoon I began thinking about how some people run dual batteries in their trucks. The extra amp hours might have saved me a tow home, and in a hairy situation could mean the difference between driving to safety instead of walking to it if the charging system were to fail again.
Is anyone running dual batteries? If you are, can you post a pic of your setup?

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PostPosted: Sun Oct 23, 2016 10:46 am 
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I have been for years. I used to use an isolator but when one of the bolts rusted off I replaced it with a smart separator. The full size GM trucks/suv's have a space for a second battery if you have the diesel and a separator relay engages with the starter to parallel them for more current when starting and then have a smaller fused charge wire when not starting.
I bought the second tray for the diesel trucks and it bolted right in so I put the battery there. I started with an isolator (diodes) years ago because I was running a computer in my truck but now that you can do the same with a smart phone a separator (relay) is sufficient.
Looking at my pics I only have the battery mount, I guess I didn't take any of the isolator or separator so not much to see.
This is what I have
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwiDt-6PovHPAhUJyyYKHdCgDtoQFgg8MAE&url=http%3A%2F%2Fwww.cooperindustries.com%2Fcontent%2Fdam%2Fpublic%2Fbussmann%2FTransportation%2FResources%2Finstructions%2FBUS_CBT_INST_180126a.pdf&usg=AFQjCNFR7dfGUiIklTekQZkem3MgC8W5AA&sig2=8ri6EUnDerxDWaXfR84VPw&cad=rja

It has a small voltage sensor and when the main battery is over 13v it will engage and connect the secondary to charge it. Then there is a line where you can connect a switch to manually engage.

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PostPosted: Sun Oct 23, 2016 8:30 pm 
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Not personally, but have installed a dual setup with 3g alternator on a Bronco, using the tray and other parts from an OBS Diesel.

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PostPosted: Sun Jan 08, 2017 9:42 pm 
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I just bought a 2007 Yukon XL 4x4. And it has the dual battery tray. But no battery in the second tray. Anybody know if a second battery will slip right in? Will it auto switch to the second if the first goes bad? What are the other advantages?

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PostPosted: Sun Jan 08, 2017 10:41 pm 
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I have dual batteries in my 2005 4Runner with a CTEK 250S Dual to manage charging the second battery.

The second one lives in the corner of the engine bay on the passenger side.

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PostPosted: Sun Jan 08, 2017 10:45 pm 
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Has anyone figured out how to run dual batteries in a 1995 Rodeo.

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PostPosted: Sun Jan 08, 2017 11:53 pm 
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Have you priced batteries lately? They sure got expensive in the last few years. I can remmber buying agood battery for 50-60 bucks in the 90's now its around 150.00.

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PostPosted: Mon Jan 09, 2017 7:23 am 
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I recently purchase a 2013 FJ Cruiser. As I was doing my research on upgrading her to an overland vehicle, many people debated the merits of dual batteries. Since I was thinking of taking her really far off the roads, I decide I needed to do the dual batter upgrade first. I picked up the dual battery kit from Shrockworks: http://www.shrockworks.com/Dual-Battery ... 16275.html

It moves the secondary air injector back against the firewall and mounts the second battery behind the passenger headlight (exactly opposite the main battery). I also picked up the CTEK 100A offroad system for battery charging and monitoring: http://smartercharger.com/products/100a-offroad/

The CTEK kit allows for solar recharging which would also be helpful when overlanding. I also planned to use the second battery to power some of my auxiliary components (CB, lights, 12v outlets) to reduce the load on the main battery to make sure it keeps enough power for starting the engine.

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PostPosted: Mon Jan 09, 2017 7:45 am 
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NamelessStain wrote:
I recently purchase a 2013 FJ Cruiser. As I was doing my research on upgrading her to an overland vehicle, many people debated the merits of dual batteries. Since I was thinking of taking her really far off the roads, I decide I needed to do the dual batter upgrade first. I picked up the dual battery kit from Shrockworks: http://www.shrockworks.com/Dual-Battery ... 16275.html

It moves the secondary air injector back against the firewall and mounts the second battery behind the passenger headlight (exactly opposite the main battery). I also picked up the CTEK 100A offroad system for battery charging and monitoring: http://smartercharger.com/products/100a-offroad/

The CTEK kit allows for solar recharging which would also be helpful when overlanding. I also planned to use the second battery to power some of my auxiliary components (CB, lights, 12v outlets) to reduce the load on the main battery to make sure it keeps enough power for starting the engine.

I wish I could do that for my vehicle... :(

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