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Old 08-06-2018, 08:40 AM
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12v Cargo Area Wiring Question

I recently purchased a Dometic CFX 50 to use in my Jeep JKU, I already had a Goal Zero Yeti 400. My plan was to use the Yeti as a quasi dual battery to protect my starter battery. For the foreseeable future my trips will never be longer then a long weekend so I figured with the Yeti and possibly adding solar and/or chaining a battery I should be able to make it work.

When I put everything in the back of the Jeep and plugged it in I ran into a problem. The stock rear 12v outlet wont charge the Yeti, I get the low voltage error. Now having read that stock 12v outlets often wont run a fridge I am not entirely surprised. As it turns out mine wont run the fridge either, at least not with the jeep off. As a temporary solution I used an inverter to charge they yeti which works fine, but my understanding is this is less efficient. So how should I proceed?

Would using something like the ARB wiring kit, wired directly to the battery solve my problem? I know that should run the fridge but will it also charge the yeti over 12v? I liked the idea of the Yeti being hooked up to a keyed 12v that would automatically shut off when the jeep was off, is there a way to wire up the new outlet to function that way. OR would it be better to wire it so that I can manually switch the outlet off when I want to?

Let me know what you all think. Thanks in advance!

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Old 08-06-2018, 08:55 AM   #2
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you generally need about 13.5 volts or higher to charge a 12v battery. Did you measure the output of your solar? Do you have a solar charge controller?

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Old 08-06-2018, 09:22 AM
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Sorry if I was confusing. I’m not trying to charge the battery with solar. I am trying to charge the rear battery (the yeti 400) from the Jeeps battery/alternator. At a minimum I’d like to do that while driving but possiblely retain the option to do so while parked with the Jeep off.

My research has led me to believe the stock 12v outlet has a lower voltage due to the factory wiring being small.
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Old 08-06-2018, 08:55 PM   #4
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OK. I am not familiar with the Yeti 400. But looking at the specifications, it looks like it needs 120 vac or the solar panels to charge. What is the output of the wall charger that came with it? is it 24vdc?
The user guide states that the Yeti 400 CAN NOT be charged from 12v dc, and if you try, it may damage the unit.
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Old 08-07-2018, 10:30 AM
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There are two different models of the 400 the lithium version cannot be charged via 12v but it was my understanding that the regular version could.
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Old 08-07-2018, 08:53 PM   #6
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Well,I am no expert. What does your user guide say?

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