SOLAR Installation |
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Solar power is one of the keys to a clean energy future and plays a crucial role in the decarbonization of our societies. Every day, the sun gives off far more energy than we need to power everything on Earth.
How Does Solar Energy Work? Sunlight is the largest energy source to reach the Earth but, despite this, the intensity of the energy that reaches the Earth’s surface is relatively low due to the radial spreading of solar radiation as it travels from the distant Sun. More of this sunlight is lost in the Earth’s atmosphere and due to clouds, which between them scatter as much as 54% of the incoming light. As a result, the sunlight that reaches the ground is around 50% visible light and 45% infrared radiation with the rest being made up of small amounts of ultraviolet and other types of electromagnetic radiation. Although much of the solar energy is lost as it travels to the surface of the Earth, this energy still equals around 200,000 times the daily total electricity generating capacity of the world. Exploiting this renewable resource can be difficult however, with collection, conversion and storage still being quite costly. When harnessed, solar radiation can be converted into electrical energy with solar panels, for example, or converted into thermal (heat) energy, which is easier to achieve. Electricity Generation: Electricity can be generated from sunlight using solar cells (also called photovoltaic cells). When sunlight hits a solar cell, a small electric voltage is generated as the photovoltaic effect takes place between a metal and semiconductor like silicon, or two different semiconductors. The photovoltaic effect frees electrons, which flow through an external circuit as the semiconductors present a natural difference in electric potential (voltage). This supplies a small amount power to the load, with each photovoltaic cell producing around two watts. Creating solar panel arrays from large numbers of solar cells allows for thousands of kilowatts of energy to be generated. Here is a list of the equipment needed for a solar installation.
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