A solar water heater works by absorbing heat directly from the sun rays and then heating a fluid, like water. It can also generate electricity when it has collected more than the maximum temperature setting. Solar water heaters are one of the most significant options for obtaining renewable energy and reducing greenhouse emissions. The major components of a solar water heater are a collector, a storage tank, and an insulation layer.
During the day, the solar water heater system can provide water at a 65%-80% energy efficiency rate. However, The system will need to heat the storage tank via either a gas booster or an electric element booster to work at night or on cloudy days.