Generate Electricity from sunlight

     Recently the traditional energy sources such as oil, coal, and natural gas have experienced some challenges, which include rising of prices, environmental concerns, and security concern over dependence on fossil fuels.  Renewable energies such as solar energy, wind power, tidal wave power, and geothermal energy are potential alternatives for traditional energy resources.  Nowadays, solar energy is promoted as an alternative energy resource for residential and commercial use all around the world.  Todays, the industry of photovoltaic modules is growing at approximately 25 % annually.  Moreover, over the last few years some major efforts in United States, Japan, and Europe have taken place to accelerate the use of PV systems for residential consumers.  In 2012, worldwide installed capacity of 44GW could be achieved, which is equivalent to the 44 nuclear reactors.

    PV systems are widely used by homeowners to generate electricity from sunlight. However, there are different factors that should be considered before switching to a PV system. The most important factor is the amount of solar radiation in the region.  In other words, a PV system can be a doubtful choice in less sunny regions. The local electricity cost is the second factor that may raise questions to the use of solar energy for home users. Consequently, these factors imply the type of the solar system which can satisfy the users’ requirements. Therefore, a combination of initial costs of a PV system, local electricity costs, governmental tax credits, intended load, and daily solar radiation should be calculated to determine the necessity of solar energy as an alternative energy resource. 

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Reference: Majid Ehtesham, Electrical Engineer

Categorised in: EPA