As a natural nuclear reactor, the sun releases small packets of energy called photons, the photons travel the distance of 150 million kilometers from the sun to the earth in approximately 5.8 minutes. These particles are sufficient to produce annual solar energy and meet global energy needs. Current photovoltaic power accounts for only one-fifth of the energy consumed in the United States; But solar technology is progressing and the cost of implementing this type of energy is decreasing at an impressive speed. There are many technologies to convert sunlight into energy used by buildings. The most common solar technologies for homes and businesses are solar hot water technology, passive solar design for ambient cooling and heating, and solar photovoltaic technology for electricity. Organizations and industries use these technologies to increase energy resources, improve efficiency and reduce costs. The most common type of solar energy is photovoltaic energy. Solar photovoltaic system is an electrical system that consists of solar panels, inverter and several other components (assembly, cable, etc.).
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