The Tradewinds DC incorporates alternate energy into the powering of your refrigerator/freezer system. It is designed to be used with wind power or solar panels, with back up battery power. It is fitted with either holdover or evaporator plates and depending on the model has either ducted air or air/water coolilng. A water cooled option can be added to allow the selection of air or air/water cooled operation. The Tradewinds XP have 30% more capacity for larger cabinets and two plate hookups. The Tradewinds compressor is similar to the BD.