The use of solar energy technologies, and especially solar photovoltaic (PV) technologies, has enjoyed significant growth over the past decade. By the end of 2011, the total estimated installed capacity of PV systems around the world was 70 GW, and could exceed 91 GW by the end of this year. These exceptional growth rates are expected to continue into the future, total installed capacity could grow to 230 GW by 2017, and may contribute to as much as 11% of the global electricity supply by the year 2050.

 Solar energy power is not a new technology. It is over a century that first solar was constructed, but today’s global warming, rising energy cost, and economy hardship brought all attention to solar. Solar installation became an alternative electricity source for home and business owners and everybody wants to know what is solar, how solar works, and what are solar benefits.The first solar cell was constructed by Charles Fritts in the 1880s. In the 1940s, researchers Gerald Pearson, Calin Fuller and Daryl Chapin created the silicon solar cell in 1954.First cells had efficiencies of about 6% compare to today's standards about  By installing a PV system you can eliminate or significantly reduce your monthly electric utility bill. Other benefits include:Generous government incentives can be found to help reduce the initial capital costs of a solar system by as much as 30%.The cost of electricity from the utility is getting higher every day, and will only continue to rise about 7% per year. But by generating your own power with solar, you can stabilize your cost of electricity and even reduce it’s sensitivity to future rate hikes.