Flat plate solar collector is the basic component of low-temperature heat utilization of solar energy, and has been the leading product in the world solar energy market. Flat plate collector has been widely used in many fields, such as domestic water heating, swimming pool heating, industrial water heating, building heating and air conditioning.

The water heater composed of flat plate solar collector parts is called flat plate solar water heater. The flat plate solar collector is mainly composed of heat absorbing plate, transparent cover plate, heat insulation layer and shell of flat plate solar collector.

Flat plate collectors use metal plates coated with an endothermic film, which are the core of solar collectors, efficiently absorb sunlight and heat liquids (usually water). The main applications include building heating and domestic water heating or cooling (if used with adsorption refrigeration).