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SpinDistribute.com Article Directory

The following article was published in our article directory on January 26, 2011.
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How Solar Panels Work

Article Category: Home Management

Author Name: Kellie

Did you know that there are two major kinds of solar panels? They are the solar electric or photovoltaic (PV) panels and the solar water heating ones. Since the former is more popular these days, let us first concentrate on them.

Basically, the photovoltaic systems work by directly switching sunlight into electricity. The term comes from two words: photo referring to light and voltaic referring to electricity.

Each PV cell is commonly consisted of crystalline silicon or other semiconductor that absorbs sunlight. Think about your watch or calculator run by solar power; they also run by PV systems. The more complex PV systems can be found in houses as well as utility grids. The latter are the power sources available at your local electricity provider.

A solar electric panel typically contains about 40 PV cells. Then, about ten of these panels make up a PV array. Most of these panels have top protective silicon layers: the first one is where collecting circuitry is attached and the other is a polymer backing layer. The former is treated and made electrically negative while the back layer is treated to be made electrically positive. Whenever the sunlight hits the electrons loose, they move up and crowd the top layer. These electrons are collected by the electrical contacts located on the surface of the top layer and then routed through external circuit. This is what provides power to the electrical system that is attached to the solar panels.

For south-facing roofs, PV panels are often set up on the roof s slope in the north hemisphere. On the other hand, for north-facing roofs, the panels are installed parallel in the southern hemisphere. Of course, you may see some arrays that are set up on the ground or mounted on poles. However, these placements must first be verified with your homeowners association rules.

Aside from the rules and provisions in your area, there are other considerations you should take when installing PV panels. For example, you need to know how many hours of peak sunlight your system could get. Will they get sun exposure all throughout the year between 9 A.M. and 3 P.M? Is it often foggy, dusty, or stormy in your place? All these things must be put into the equation as they significantly affect the power of your system.

For those who can t get a lot of sun exposure, they can choose to have a grid-tied system. This is when their solar power system is connected to a utility power grid so the latter can supply the needed electricity whenever the PV panels are not producing enough.

In grid-tied systems, it is possible that the solar panels create more energy than what the home needs in some occasions. For instances like these, most utility companies use net billing for their clients. The company credits the homeowners for their excess electricity then applies the credits to other months when the PV panels produce less electricity.

Keywords: solar panels, solar power, go green with solar power, solar energy,

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