Working of a solar water heater: 

The solar heater system is generally installed on the roof tops, terraces or in huge grounds. The solar panels face the direction of sunlight and the system is constantly provided with a flow of water. Water gets heated with the help of sunlight. Since the storage tank is made of a material which can trap heat, the water in the tank stays hot throughout the night and can be ready for use in the morning.

In a typical solar water heater, water is heated by solar thermal energy absorbed by the collectors. The hot water with lower density moves upwards and cold water with higher density moves down from the tank due to gravity head.

Advantages of solar energy:

• It is pollution free. Solar energy is the most important form of non-conventional energy today. 

• It is Easy to handle and has less maintenance. 

• It is freely available in the environment. 

• It is important for long-term benefit. 

• Its instruments are easy and simple to handle.