Electric Power

Backwoods Solar offers many highly efficient electric and propane powered refrigerator/freezers.  They say their best buy for many years has been the Novacool which uses the same high efficiency Danfoss compressor that is used in the more expensive Sunfrost.

Sundanzer makes small (1.8, 2.8 and 8.1 cubic foot) and efficient top-opening refrigerators and freezers.   Voltage required is 12 or 24 VDC.

Daily Energy Consumption (No door openings, refrigerator 38oF, freezer +10oF)

Ambient temperature  70oF 90oF 110oF
Refrigerator DCR165 77 watt-hrs 168 watt-hrs 348 watt-hrs
Refrigerator DCR225 90 watt-hrs 198 watt-hrs 393 watt-hrs
Freezer DCF165 272 watt-hrs 441 watt-hrs 766 watt-hrs
Freezer DCF225 360 watt-hrs 532 watt-hrs 817 watt-hrs


Sunfrost offers a variety of very efficient refrigerator/freezers from 4 to 19 cubic feet.  The 19 cubic foot model uses only 15 KWH per month compared to 90 KWH per month for a conventional refrigerator of the same size.  Voltage requirements can be selected from 12 VDC, 24 VDC, 110 VAC and 220 VAC.

Propane Power

Crystal Cold makes refrigerators as small as 12 cubic feet that are powered with propane.