INTRODUCTION
Since the evolution of the earth , SUN is being the main the source of the human & plant life like, as source of light, food production (photosynthesis) and food growing etc . After the advancement in the solar technology the sun’s energy is utilized for the various energy applications like heating water, cooking the food, Power generation, etc.
The Sun sends out energy, which arrives on Earth as a mixture of light and heat. Both of these are incredibly important—the light makes plants grow, providing us with food, while the heat keeps us warm enough to survive and also we can use either the Sun's light or heat with the help of solar cells directly to run a television or a car. Solar cells are becoming popular in places where it is not possible to provide electricity from the grid and load shedding area. The cost of solar cells has come down because of advancements in the semiconductor technology and mass production of solar cells. On an average, every square meter of Earth's surface receives 164 watts of solar energy. In this lesson we are going to study how solar energy converts into electrical energy.
OBJECTIVES
After completion of this unit students will be able to:
- explain the basic principle of solar cells and their structure
- describe skills required in installation and maintenance of solar cells
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