The main component of a solar water heating system is a solar collector. It contains a liquid that is heated when the sun shines on it. The two general categories of solar collectors are flat plate and evacuated tube collectors.
A solar air collector may be used to harness the sun’s energy through the use of a suitable absorbing medium to heat the air. The air collector can be used for either industrial processes or space heating.
A Solar Controller ensures proper heat transfer from the solar collectors to the hot water storage unit. There are two basic types: the differential solar controller and the photovoltaic-powered solar controller.