Wikipedia is known for giving information and they define a solar hot water panel as a solar water heater that uses the sun's solar power energy to heat a liquid, which is used to transfer the solar heat to a solar heat storage vessel. In the home or your house, for example, drinking potable water would be heated and then stored in a solar hot water tank. Flat-plate solar-thermal solar collectors are usually placed on the home’s roof, and have a solar absorber plate to which fluid or liquids circulation solar tubes that are attached. The solar absorber, usually coated with a dark solar selective surface, assures the conversion of the sun's solar radiation into solar heat, while fluid and liquids through the tubes carries the solar heat away where it can be used or stored.