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Abstract
Solar energy has been used since prehistoric times but in a must primitive manner before 1970. Some research and development was carried out in a few counting to exploit solar energy more efficiently but most of this work remained mainly academic. After the dramatic rise in oil prices in the 1970`s several countries began to formulate extensive research and development programmers to exploit solar energy.India receives solar energy equivalent to over 5000 trillion kiwi/year, which is far more than the total energy consumption of the country. Solar product is very profitable to Consumers. It saves their time and money as well as national resources. When consumers buy this product that means he invest in capital goods. Once he invests he gets profit for long time.