What is Solar Water Heater?
Solar water heaters use the sun's energy to heat water for your home. Solar panels on the roof collect the sun's energy to heat water, which then flows to a storage tank ready for use.
There are many different types and configurations of solar water heaters available. The important thing is to choose the type that best suits your home size, climate, house type, roof characteristics, water quality, available space and aesthetic preferences.
How Does It Work?
Cold water flows from the tank to the solar collector, usually located on your roof. In a split system as shown below, the cold water is pumped to the collector. In a thermosiphon system, the tank is mounted on the roof above the collector and the cold water flows naturally into the collector as it is heavier than the hot water.
Solar collectors are made of materials that absorb the sun's heat very efficiently. The cold water passes through the collector and the heat from the collector heats the water, which then returns to the tank.
The hot water rises to the top of the tank and the colder water is taken from the bottom and returned to the solar collector. When you use hot water, it is taken from the top of the tank, where the water is hottest.
The two most common types of SWHs are close-coupled thermosiphon systems and split systems. Consumers can choose between many component types to suit the needs of their home. In general, you can choose from.