What is the most energy efficient cooler?

In mobile applications electrical devices are mostly supplied from “limited energy sources”. That means energy consumption is a crucial factor to consider. The table below tells you how to calculate the consumption of specific cooling appliances. It becomes obvious that longer periods of use (e.g. more than 2 days) call for the energy efficient compressor technology. The owners of an absorption unit have an alternative, though: gas operation.

Absorption technology CombiCool ACX 40

Formula: Power input : voltage
Example: 85 watts: 12 volts
Amperage: 7 Ah / h, 168 Ah / day

Thermoelectric technology CoolFun SC 30

Formula: Power input : voltage
Example: 85 watts: 12 volts
Amperage: 47 watts: 12 volts = 3.92 Ah / h, 94 Ah / day

Compressor technology CoolFreeze CFX 40W

Formula: Current draw x average running time* (48 W: 12 V = approx. 3.75 A)
Example: 3,75 A x 22 % 
Amperage: ‹ 1 Ah / h, ‹ 24 Ah / day

Energy consumption labeling

Coolers which are predominantly run on the mains are subject to the Eco Design directive for determining the energy efficiency class. Absorption coolers are exempt as they can also be operated with gas. Depending on the cooling technology, mobile cooling appliances can use two different measuring techniques. Thermoelectric coolers cool down to an interior temperature of 17 °C at an ambient temperature of 25 °C. The power consumption required for this is represented by the energy efficiency. The Dometic thermoelectric coolers all consistently reach A++. Compressor-powered coolers are classified with an ambient temperature of 25 °C and an interior temperature of 5 °C. The models in the Dometic CFX series here with the A++ energy efficiency class achieve top rates which have never been matched in the area of mobile compressor coolers.

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