In 1839, a French Scientist Edmond Becquerel discovered the photovoltaic effect. Photo means "light" and voltaic means "electricity" in Latin, photovoltaic means electricity from light. Solar Panels are an arrangement of solar cells mounted in a frame and covered with glass. It is also known as Solar PV Modules, Solar Plates which converts directly sunlight into electricity. It is a clean and renewable source of energy which reduces carbon emission, reduces electricity bill for a homeowner, and has a life expectancy of 25-30 years.