Atlantis Solar® Window Air-Conditioner absorbs solar energy to heat the inside medium by using a thermal solar panel collector with copper heat conducting inner coils inside the solar panel. The refrigerant from the compressor goes through the copper coil inside he solar panel collector and undertakes a heat exchange from the sun. The refrigerant heated by the medium inside the solar collector will go through a cycle inside the system cooling and heating before entering the condenser. We use a smaller compressor instead of standard compressors to run our system which saves electricity dramatically. A smaller compressor consumes much less electricity and works together with our solar collector to saving electricity.