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Old 08-25-2013, 11:19 AM
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$99 Koolatron Compact Plug In Cooler Amazing!

Just back from 1 week trip to Yellowstone and Jackson Hole. This small plug-in cooler is great. Fits nicely behind the passenger side seat with plenty of legroom left. Kept cheese, sandwich meat and other items at constant 40 degrees that I wouldn't trust to keep in an ice cooler in 85-90 degree weather. Quiet in the car and in the hotel room, as I bought the 110 volt converter for at night in the room. Highly recommend!

Amazon.com: Koolatron Compact Kooler: Appliances
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Old 08-25-2013, 12:10 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

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Originally Posted by ColoradoJeep View Post
Just back from 1 week trip to Yellowstone and Jackson Hole. This small plug-in cooler is great. Fits nicely behind the passenger side seat with plenty of legroom left. Kept cheese, sandwich meat and other items at constant 40 degrees that I wouldn't trust to keep in an ice cooler in 85-90 degree weather. Quiet in the car and in the hotel room, as I bought the 110 volt converter for at night in the room. Highly recommend!

Amazon.com: Koolatron Compact Kooler: Appliances
be careful to make sure that lighter socket plug stays tight as those things are known to melt the power cord after melting 2 of them in our semi truck i finally just cut the plug off and hard wired it using a 2 wire trailer harness to disconnect it
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Old 08-25-2013, 02:32 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

I've been looking for a 12v car cooler but have yet to find one. This one has mixed reviews, doesn't sound like it will keep things that cool if interior of car gets hot (while parked for example). Didn't see spec for power draw, seems like it would wear down the car battery fairly quickly.
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Old 08-25-2013, 02:36 PM
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This is the best invention since the un breakable Prell shampoo bottle. I have given as a gift many times.
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Old 08-25-2013, 03:08 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

I bough a nice little compact thermometer reading from 0 to 220 and put it in the cooler. It stayed at 40 degrees even in 92-95 weather on Wyoming and Montana late August. I unplugged it if were were out of the Jeep for 30 minutes and it only warmed to about 42 degrees at most. The 110 converter gets warm (not hot) but I placed it on the bathroom sink counters to plug it in at night so not problem. The Amazon reviews were highly positive.
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Old 08-25-2013, 08:02 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

Quote:
Originally Posted by Milous View Post
I've been looking for a 12v car cooler but have yet to find one. This one has mixed reviews, doesn't sound like it will keep things that cool if interior of car gets hot (while parked for example). Didn't see spec for power draw, seems like it would wear down the car battery fairly quickly.
Actually none of them do... As they don't have a compressor they have no "Pull Down" ability. They will always be exactly the number of degrees below the ambient temperature as per the manufacturer specs.

So lets say they do 42 Degree drop max. So if it was 80 inside the car it will be 38 in the cooler (close to a fridge)... Cool. If it is 105 in the car the cooler will be 63 in the cooler, not cool and things WILL start to go bad at that temperature if you have meats in there. (Typically most 12V Coolers cannot attain the 42 degree drop in hot temperatures or even close)

Portable coolers only work when the air conditioning in the car will keep the ambient temperature of the vehicle in an acceptible range. Check with
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Old 08-25-2013, 08:51 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

@Willx
Do you know how they can keep the cooler 40F below the ambient temp without a compressor?
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Old 08-25-2013, 08:57 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

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Originally Posted by hemi15 View Post
@Willx
Do you know how they can keep the cooler 40F below the ambient temp without a compressor?
That I don't remember... the rest came from a very good refrigeration guy. I will ask him though!
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Old 08-25-2013, 09:45 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

a) see Thermoelectric cooling - Wikipedia, the free encyclopedia for an explination of the Peltier effect.
b) do not block the fan inlet and outlet or it won't work.
c) I have one that holds 9 cans and another 44 quart. Both pull about 4 amps. I have a disconnect that releases power when the voltage gets marginal for starting
d) They do not really "pull down", more they keep already cold things cold. I usually pack the night before and use the 110vac converter overnight
e) or you can just run the rear seat a/c into the glove box (duct runs right under it).
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Old 08-25-2013, 09:48 PM
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Quote:
Originally Posted by padgett View Post
a) see Thermoelectric cooling - Wikipedia, the free encyclopedia for an explination of the Peltier effect.
b) do not block the fan inlet and outlet or it won't work.
c) I have one that holds 9 cans and another 44 quart. Both pull about 4 amps. I have a disconnect that releases power when the voltage gets marginal for starting
d) They do not really "pull down", more they keep already cold things cold. I usually pack the night before and use the 110vac converter overnight
e) or you can just run the rear seat a/c into the glove box (duct runs right under it).
Thanks!

Very good description... and don't get me wrong I use them sometimes but you always should be aware they are not a fridge
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Old 08-26-2013, 12:53 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

SEVERAL COMMENTS:

1. Always plug in the 110 converter and cool the unit in the house or garage overnight before leaving on the trip. I put a Ziploc bag of ice cubes in the night before to help the cool down.

2. So it only cools a certain number of degrees below the "ambient" temp in the vehicle. Who the H*LL drives around in 95 degree summer heat without the A/C on?

3. Open the A/C vents in the rear and face the cooler fan in toward those outlets.

4. If you are going to park the Jeep in 95 degree weather and go hiking for 6 hours, better stick with an ice cooler (although all your ice might be melted anyway as its hard to find "ice blocks" rather than cubes on the road).

5. The plug in cooler is best for travels where you drive a lot, park a little, and stay overnight in a hotel.
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Old 08-26-2013, 01:51 PM
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Re: $99 Koolatron Compact Plug In Cooler Amazing!

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Originally Posted by Willx View Post
That I don't remember... the rest came from a very good refrigeration guy. I will ask him though!
Most use a fairly large thermocouple cooler. Looks like an old metal can TO-3 type transistor mounted on a heatsink and a small fan to blow air around the inside.

If it can both heat and cool, pretty good odds is a thermocouple
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