Solar Coolers

The Solar cooler is powered by solar evacuated tube collectors, which collects solar thermal heat from the sun. This energy is then collected and transmitted into a solar absorption chiller by means of a heat transfer fluid (HTF). This HTF is generally comprised of water and corn or propylene glycol, it is designed for the most efficient heat transfer as well as providing freeze protection in the winter. The HTF then passes into the solar absorption chiller and thus powering it, providing free, solar air conditioning.

The Solar coolers can be used anywhere that the sun shines; they are low in operating and maintenance costs. They consume little or no electrical energy, essentially the only parts that use electricity are low amp fan motors and small pumps that move the thermal transfer fluid (Glycol, a food-grade antifreeze) from the collectors to the chiller and then backup to the collectors - all of these small electrical loads can run from solar PV panels if desired. Inside the unit is another small pump that circulates the refrigerant. There is no "compressor" to consume power.

If you've ever loaded a cooler full of ice and food to take to the beach, only to find it all a soggy mess once you've arrived, then you can probably understand the appeal of what is essentially a portable refrigerator. The Solar Cooler can hold a steady 42° F (5.5° C) for over 24 hours, depending on how often the lid is opened, but can also go as low as 14° F (-10° C) if needed. The temperature is set precisely using a digital display on the side. Users can also get more power by attaching additional solar panels or pre-charging the batteries through an electrical outlet before going out.

The cooler comes with handles so it's easier to carry, and the whole case features a rugged design so it can survive numerous trips and parties unscathed. As an added bonus, both USB and 12 V outlets are located on the side, which can be used to charge a mobile phone or plug in a blender. The inside lid even contains a small light, so you can find what you need in the dark.