Solar energy is the one of the most abundant sources of energy. According to Wikipedia, there will be another 7.8 billion years before the sun reaches the next phase of evolution. This is the stage in which helium fusion will begin producing carbon and oxygen. By then, human race will either no longer exist or come up with a solution to cope with the problem.

Solar Energy is one of the most powerful forms of renewable energy. The heat from the sun's ray is converted into electric energy. Being renewable and abundantly free, once it is properly harnessed, solar rays can be excellent source of economical energy. Understandably, solar energy is growingly being used in diverse forms and functions.

Solar panels, comprising of photovoltaic cells, are installed on the roof tops and such other exposed areas where the sun's rays are in ready abundance. Solar panels collect the energy and convert them into electricity. The produced electricity can then be used to empower appliances connected to it.



Solar cells are often electrically connected and encapsulated as a module. Photovoltaic modules often have a sheet of glass on the front (sun up) side, allowing light to pass while protecting the semiconductor wafers from the elements (rain, hail, etc.). Solar cells are also usually connected in series in modules, creating an additive voltage. Connecting cells in parallel will yield a higher current. Modules are then interconnected, in series or parallel, or both, to create an array (Array: A collection of photovoltaic modules electrically wired together in one structure to produce a specific amount of power) with the desired peak DC voltage and current.These flat-plate PV arrays can be mounted at a fixed angle facing north, or they can be mounted on a tracking device that follows the sun, allowing them to capture the most sunlight over the course of a day. About 10 to 20 PV arrays can provide enough power for a household; for large electric utility or industrial applications, hundreds of arrays can be interconnected to form a single, large PV system.






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