Sun Frost makes the world's most energy efficient domestic refrigerators and freezers. Our domestic and DC vaccine refrigerators are currently being used in more than 50 countries, and are available for use with AC or DC power. To promote sustainable living, our product line has now expanded to include composters and composting toilets. Sun Frost was founded in 1986 by an ambitious group of Northern California solar pioneers seeking to meet the need for energy-efficient refrigeration. The efficiency of Sun Frost refrigerators and freezers makes them ideal for use with solar, hydro, wind power or even on boats. All models are available in 12 or 24 volt DC, or 110 or 220 volt AC.