Sun Frost RF16 Fridge/Freezer:
The Sun Frost RF16 is an extremely efficient full-size refrigerator. It has two independent cooling systems and temperature controls. In fact, one compartment may be left running while the other is shut off. The uniquely designed cooling coils on the outside of the Sun Frost do not require fans. The Sun Frost RF16 12 volt DC model consumes 15 KWH per month, or an average of 42 amp hours per day. Producing the 110 KWH needed to run the typical refrigerator on a solar power system would require an investment of around $12,000 in hardware, batteries, and inverter. A Sun Frost RF16 will reduce this cost by a factor of at least six because of its increased efficiency and the elimination of inverter losses. Inverters convert DC battery power to 120V AC at an energy loss of about 10%.
Make your own “Pot-in-Pot Refrigerator”
The Pot-in-Pot system consists of two pots, a smaller earthenware pot nestled within another pot, with the space in between filled with sand and water. When that water evaporates, it pulls heat from the interior of the smaller pot, in which vegetables and fruits can be kept.