Jumping to 1970, there was major discussion about the efficiency of solar cells and the reduction of costs. Up to that time, the efficiency of solar cells was only about 14 percent and was not comparable to the high cost of producing those cells . In addition,  establishes that in 1970, Exxon Corporation designed an efficient solar panel which was less costly to manufacture. This was a major milestone in the history of solar energy. In 1977, the United States government embraced the use of solar energy by launching the Solar Energy Research Institute.
Other governments across the world soon followed . Nevertheless, this developing solar energy industry collapsed because of the sharp decrease in oil costs and a lack of constant strategy support. Solar energy markets have recover momentum from early 2000, showing unique growth lately. The entire inaugurated capacity of solar based electricity generation has risen to approximately 40GW by 2010 by nearly insignificant capacity in the 1990s as seen earlier in . Now most recently in 2012, the world has seen enormous investment in utility scale solar power plants with records for the largest plants being frequently broken.
As of 2012, the largest solar energy plant was one located in China, with an installed capacity of 200 megawatts . This; however, was recently surpassed by India’s Gujarat Solar Park. A collection of solar farms scattered around the Gujarat region, boasting a combined installed capacity of 650 megawatts. The CSP market initially came up in the early 1980s but declined due to lack of government support in the US. Nevertheless, a current strong revitalization of this market is apparent with 14.5 GW in diverse stages of development in 20 countries as well as 740 MW of additional CSP capacity from 2007 to 2010 as established earlier by [4, 5 and 6]. Whereas most regions globally, for instance, Spain, South Africa, Southwestern United States, Morocco and China, offer appropriate setting for the operation of CSP, market activity is mostly concerted in Spain and South-western United States .
This is because they are supported by constructive investment tax credits, policies as well as feed-in tariffs. Presently, a number of projects worldwide are either being constructed, in the planning phases or going through feasibility studies.
Thus, the market is anticipated to continue growing at a considerable pace. Solar energy has undergone a remarkable technological shift. Whereas early solar technologies as made up of small-scale photovoltaic (PV) cells, current expertise are represented by solar concentrated power (CSP) as well as large-scale PV systems feeding into electricity networks see .
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