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Solar thermal technology uses the sun’s energy, rather than fossil fuels, to generate low-cost, environmentally friendly thermal energy. This energy is used to heat water or other fluids, and can also power solar cooling systems.


  • Solar Water Heater is based on the principle of black body absorption. Solar water heaters are one of the common applications of conversion of solar energy to heat water. The black surface of the collector absorbs the heat from the sun rays and transfers it to the water passing through the pipes of the collector .Hot Water being lighter, rises to the insulated storage tank and an equal amount of cold water replaces this hot water. This cycle Repeats as long as the sun shines, resulting in all the water getting heated for distribution through pipes to the required usage points. These systems are normally used for domestic hot water, swimming pool heating, commercial and industrial applications. It consists of heat collection system (i.e. flat plate collector or vacuum tube system) heat storage system ( hot water collection tank) and an auxiliary heating system ( during cloudy days, electricity can be used to heat water for emergency use)

Flat Plate Technology Vacuum Tube Technology