An apparatus that aids in heating water by harnessing solar energy is a solar water heating system. This energy is available for free. Water is heated by solar energy, or the sun's beams. 60–80 degrees Celsius can be reached by heating water with ease. solar-powered water heater For home use, solar water heaters (SWHs) with capacities between 100 and 300 liters are appropriate. Larger systems can be found in hotels, hospitals, canteens, restaurants, and guest homes, among other places. For domestic use, a 100-liter SWH can replace an electric geyser and potentially save up to 1500 units of electricity yearly.

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