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  #1  
Old 12-16-2015, 08:08 PM
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portable fridge and 12v socket

currently doing some holiday touring and noticed a major issue.
currently have a arkpak730 (105ah agm inside) which runs my 70l evakool fridge. the arkpak is connected to the 12v socket in th gc. the arkpak has a display screen telling you power usage . when fridge is running it draws 55watts from the display. when I'm driving, the display reads only 10watts charging into the arkpak ! meaning the cigarette 12v socket can only deliver 65watts!.

i then tested his by unplugging the fridge out of the arkpak and just use the 12v to charge the arkpak and it was reading 65watts charging. this was the same with the front and middle 12v sockets. i haven't tested the trunk socket yet. at the rate of 65w it would take >100hrs of driving to charge the arkpak !

so the situation I'm facing is that the arkpak battery is being drained about 20% -25% overnight whilst camping (39C in the outback is working the fridge hard!)
and the arkpak is not getting charged during the day driving . so by the 3rd day battery was dead at 0% as the rate of charge is too low .

i thought the 12v sockets were rated for 150watts?

i had to resort to borrowing a battery charger from someone at a caravan powered site to charge up the battery to get some juice into the battery. this is not ideal for remote touring . the 12v socket should be able to run a fridge and charge the 2nd battery

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  #2  
Old 12-16-2015, 09:25 PM
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Re: portable fridge and 12v socket

I think that's asking a lot for a 12v power outlet. Maybe you should look into wiring up an inverter.


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Old 12-16-2015, 10:30 PM
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Re: portable fridge and 12v socket

Sounds about right, nothing to do with the Jeep, the ARKPAK DC Charger is only 7 amp.

You either need to get a bigger DC-DC charger or remove the drain whilst you are driving.

Your fridge is taking 5amp, leaving 2 amp under ideal conditions, you are getting 10 watt or about 1amp.

I'd strongly recommend when you are driving plugging your fridge into another cigarette power source on the car and let the ARKPAK charge with the full 7amp.

EDIT: Just read you aren't happy with the charge rate of 65 watts, this isn't a vehicle limitation, it's an ARKPAK limitation, as stated - the charger they include isn't really big, only a 7 amp charger that's why you aren't putting in a lot.

If you don't want to buy a new charger (understandable) you can use Solar or a 12v relay setup for charging.
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Old 12-16-2015, 10:44 PM
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Re: portable fridge and 12v socket

as suggested above you are asking alot from an oem system. run heavier cable direct to the oem battery and do what most do when they are touring outback and buy a solar panel for topping the battery up during the day.
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Old 12-16-2015, 11:34 PM
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Re: portable fridge and 12v socket

Didn't want to start a new thread so thought i'd piggy back of this one, i'm new to these fridges, bought a Waeco 35L fridge and will be using it over the xmas break down south of WA, Margaret River way so not super hot.

Will I be ok running it overnight off the GC's battery? It will be driven on and off during the day, just don't want to go hunting for a jump start every morning
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Old 12-16-2015, 11:42 PM
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Re: portable fridge and 12v socket

Quote:
Originally Posted by Kizz302 View Post
Didn't want to start a new thread so thought i'd piggy back of this one, i'm new to these fridges, bought a Waeco 35L fridge and will be using it over the xmas break down south of WA, Margaret River way so not super hot.

Will I be ok running it overnight off the GC's battery? It will be driven on and off during the day, just don't want to go hunting for a jump start every morning
I've done this before and it's been fine, but obviously you will want a backup plan incase something goes wrong.
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Old 12-17-2015, 12:37 AM
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Re: portable fridge and 12v socket

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Originally Posted by SnakeDoctor View Post
I've done this before and it's been fine, but obviously you will want a backup plan incase something goes wrong.
Thanks mate, might look at those portable jump starters, trouble is I'll need a roof rack now too as the interior is packed to the max when we go camping already
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Old 12-17-2015, 03:50 AM
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Re: portable fridge and 12v socket

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Originally Posted by Kizz302 View Post
Thanks mate, might look at those portable jump starters, trouble is I'll need a roof rack now too as the interior is packed to the max when we go camping already
Ridge Ryder Solar Blanket - 100 Watt - Supercheap Auto

This is my backup, fits under the passenger seat if its not too low, ended up getting it for $280 ish when it was on sale + the ebay click collect 15% discount code "collect15".

Relevant for the OP too, separate your fridge so your ARKPAK can take the full 7amp whilst driving and then use a solar blanket whilst parked and should be able to camp indefinitely with a small drive if you don't have much sun for a day.
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Old 12-17-2015, 05:09 AM
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Re: portable fridge and 12v socket

Quote:
Originally Posted by Kizz302 View Post
Will I be ok running it overnight off the GC's battery? It will be driven on and off during the day, just don't want to go hunting for a jump start every morning
IIRC the starting battery in the GC isn't designed for deep-cycle service, so running it down to half charge or below on a regular basis is likely to severely shorten it's life.. certainly carrying a jump pack is required, but if you end up actually having to jump it you should consider a better solution..
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Old 12-17-2015, 02:42 PM
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Re: portable fridge and 12v socket

Quote:
Originally Posted by tomk View Post
IIRC the starting battery in the GC isn't designed for deep-cycle service, so running it down to half charge or below on a regular basis is likely to severely shorten it's life.. certainly carrying a jump pack is required, but if you end up actually having to jump it you should consider a better solution..
Agreed. If you are doing hard core camping, recommend a combination solar charger and deep cycle specialty battery [or rig one up yourself] if you need to get into the cooler in the evenings.

Beats trying to get cell service out in the middle of nowhere to get a jump.
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Old 12-17-2015, 03:25 PM
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Re: portable fridge and 12v socket

I'd also invest in something like this. Cheap insurance and will fit in the glovebox.

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Old 12-17-2015, 07:38 PM
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Re: portable fridge and 12v socket

Thanks for the suggestions guys, much appreciated. The solar solution looks good but $410 at Supercheap at the moment. Although they are bulky, SCA have a 900AMP charger for about $120 which might be cheap insurance. Those glovebox ones look interesting though!
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