Ewave refrigerators have an energy rating of 400, meaning that they use on average 400 kilowatt-hours of power each year. This makes them much more efficient than average, as the typical refrigerator uses about 50 kilowatt-hours per month, or about 600 per year, as of 2015.
Ewave refrigerators, a product of Magic Chef, come in basic top-freezer models. While Daewoo, LG and Goldstar make refrigerators of similar size and with similar energy efficiency levels, the Ewave model is quite competitive. Among the other fridges in the class, the Crosley and Summit models use the most energy, getting as high as 457 kilowatt-hours per year. Goldstar and LG each manufacture models that get as low as 385 killowatt-hours per year.