Solar water heaters (SWHs) are the simplest application of solar thermal technology using free energy from the sun to provide hot water for any applications ranging from domestic to industrial. Solar water heating systems mainly include water storage tanks, piping systems, and solar collectors. They are a mature technology, pollution-free, cost-effective, and result in significant savings on electricity bills.
Solar water heater of Solar water heaters (SWHs) of 100-500 liters per day (LPD) capacity are suited for domestic use. Larger systems can be used in dharamshalas (guest houses), restaurants, canteens, hotels, hospitals, etc.