Sun is the major source from which earth derives energy. It is renewable too. The global shortage of organic fuel, increased level of pollution and green house gas emission as well as rise in price of organic fuel has necessitated the demand for exploitation of the vast resource of solar energy. Be it supplying electricity to your home or satisfying your water heating needs, solar panel installation can serve both the purposes. When solar panel is installed for electricity generation purpose, it is called as solar photovoltaic modules and solar panels used for water heating purpose are known as solar thermal collectors.... more