Two main types of “portable refrigerators” exist: the thermoelectrics (also known as peltier junction units) and the compressor systems.

Thermoelectric Units

Thermoelectric units are coolers, not refrigerators. Typical examples include the Igloo® and Coleman units found at retail or sporting goods stores. The main benefits of thermoelectric units are their low price and small size. The main drawbacks are that they cool only to about 30-35 degrees below ambient temperature and draw large amounts of current. For example, in 90-degree ambient, your thermoelectric cooler will reach only about 60 degrees inside. Thermoelectrics also cannot freeze their contents. In extreme heat, their performance is poor. These units run continuously and draw as much as 10-amps, possibly resulting in a vehicle that will not start.

Compressor Units

A compressor system like the one in FridgeFreeze vaccine refrigerator/freezers is built using similar equipment to your home refrigerator/freezer. This type of system consumes less power and can refrigerate or freeze in warmer ambient temperature. These units perform better and are more efficient than thermoelectrics.

FridgeFreeze Compressor Units

The FridgeFreeze vaccine refrigerator/freezer is the most efficient portable 12/24 and 110-volt vaccine refrigerator/freezer made. The 15-liter, 20-liter, 35-liter, 45-liter and 60-liter models draw between 2.3 and 3.8 amps when the compressor is cycled on. The 100-liter model draws between 4.6 and 7.6-amps. All FridgeFreeze vaccine refrigerator/freezer models are so well insulated that the compressor is running only about 10 to 15 minutes per hour on average to maintain internal temperature.