Solar cell has its origins in the early years of the Bell Telephone Laboratory, 1950 country United States preliminary, with the purpose to produce electricity from the Sun for use in project space. Then became used widely And extend the results to industry-level solar cells in the world. When the end of the 1990s, approximately 50 in the first period in the solar cell is very expensive. Therefore, only limited use in radio communications and electric lighting in remote areas only.In 1970 the Government in domestic United States Germany and Japan has been promoting the production of electricity from solar cells, seriously and continuously as a result of a decrease in solar cells from approximately 4 million per kW. At present, the remaining approximately 1.6 hundred thousand baht per kW, which means the price of solar panels has come down a lot, but it is also more expensive than electricity prices by any other method.
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