Solar energy comes from the sun as fuel to create heat or electricity. Solar technology fall into two categories: passive and active. Passive solar heat generation and provide exposure to the structure. Active solar energy to produce electricity using a technology called the Solar Photovoltaic (PV), or heat, hot water or electric technology called Solar Thermal.
Solar energy is considered environmentally friendly because the sun is a natural source of energy that does not require the burning of fossil fuels and emissions associated online. In addition, because it is considered a renewable energy generated from the sun does not reduce any of the natural resources, and endless.Solar energy, however, is called intermittent source, which means that it is not always there. When it is cloudy or rainy, the sun is not there to give light, and solar energy systems can not produce energy. Therefore, many systems are designed with one of several types of energy storage characteristics, or backup source of energy, such as electricity networks. Additional features allow users to continue to operate the rear even if the sun does not shine.
