Which one cools best?
Whether in the car or caravan – on hot days it's not possible without a cooler. Eight thermoelectric coolers in the How To Cars test!
Cool box test: Cooling performance very different
The best cooling performance is shown by the Campingaz device and the more than 200 Euro premium model Dometic Tropicool TCX21: both reach a temperature difference of 19 degrees Celsius to the outside temperature within two hours. After three hours, the difference is even 20 degrees. At the ambient temperature of 22 degrees in our test room, there are now refreshing two degrees in the speakers. Although Dometic promises a temperature difference of 27 degrees for the premium box – in the three hours in our test room the box does not reach this value. But also the performance of the other speakers is quite acceptable. Almost all models cool down to less than 10 degrees Celsius within an hour – then the cooling of some slows down slowly. The box of Xcase falls out of the ordinary: with a maximum temperature difference of only nine degrees, it cools the worst overall. By the way: Minus degrees can not produce the thermoelectric boxes, only compressor boxes.
Operation similar, subtleties make the difference
• Especially practical: Some boxes have a small compartment for cable storage. Then you save the requests for the right cable and do not have to worry about cable clutter. Important: The connections should be at the top of the box or covered – this is the case with almost all models, except the Tropicool. She has the connections below, after a trip to the Elbe beach, they were full of sand.
* Prices: Stand 01.08.2019
So there are optimally cooled drinks
Thermoelectric coolers are not refrigerators. If you value cool drinks, you should cool them down the night before. The cool box can also be connected in advance to the household socket and cooled down. Cooling batteries provide the added freshness kick. The excursion then applies: If possible, do not put the devices in the blazing sun and do not cover the ventilation grille as the fan needs fresh air. Always open the lid only briefly, because with every breeze of warm air, condensation also gets inwards.
So AUTO BILD has tested
First ran to the pits: how is it processed? Are there any disturbing components? Is the handling unproblematic? Then the cooling performance is examined. In a room with a constant temperature of 22 degrees, the boxes are connected and the temperature in the box is measured every ten minutes. Since the thermoelectric coolers work with a Peltier cooling element, no predetermined target temperature is generated in them, but always a temperature difference – therefore, the outside temperature plays a major role. Finally, all the boxes were allowed to the excursion to the Elbe beach and prove how they beat on the way.
Conclusion: There are only a few differences in the boxes – everyone has to decide for themselves what they value. Important is a good cooling performance, otherwise the cooler does not reach higher temperatures.