Photovoltaic Solar Panels absorb sunlight as a source of energy to generate electricity. Solar is the most green, secure, renewable, sustainable, easy-to-produce energy at our disposal on our earth today.. yet the world economic system is still stuck on unsustainable fossil fuels.
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A 2017 report from the International Energy Agency shows that solar has become the world’s fastest-growing source of power, marking the first time that solar energy’s growth has surpassed that of all other fuels. In the coming years we will be enjoying the benefits of solar-generated electricity in one way or another.
How Do Solar Panels Work?
When photons hit a solar cell, they let electrons loose from their atoms. If conductors are attached to the positive and negative sides of a cell, it forms an electrical circuit. When electrons flow through such a circuit, they generate electricity. Multiple cells make up a solar panel, and multiple panels (modules) can be wired together to form a solar array. The more panels you can deploy, the more energy you can expect to generate.
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What are Solar Panels Made of?
Photovoltaic (PV) solar panels are made up of many solar cells. Solar cells are made of silicon, like semiconductors. They are constructed with a positive layer and a negative layer, which together create an electric field, just like in a battery. A typical solar module includes a glass casing that offers durability and protection. Under the glass exterior, the panel also has a layer for insulation which avoid heat dissipation.
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How Do Solar Panels Generate Electricity?
PV solar panels generate direct current (DC) electricity. With DC electricity, electrons flow in one direction around a circuit. This example shows a battery powering a light bulb. The electrons move from the negative side of the battery, through the lamp, and return to the positive side of the battery.
With AC (alternating current) electricity, electrons are pushed and pulled, periodically reversing direction, much like the cylinder of a car’s engine. Generators create AC electricity when a coil of wire is spun next to a magnet. Many different energy sources can “turn the handle” of this generator, such as gas or diesel fuel, hydroelectricity, nuclear, coal, wind, or solar.
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info source: https://en.wikipedia.org/wiki/Solar_panel