Solar Panels For Electricity Generation

Electrical activity is created in certain solids when they come in contact with light by freeing positive and negative charges. This phenomenon was explained by Albert Einstein and named it as Photoelectric effect. Solar panels are also best known for generating electricity. Almost 30% energy is required to heat water and it generated by using solar panels. It is quite simple to maintain solar panels and you almost need no expenditure for its maintenance that is why they are known to last for almost 25 years. Almost 36 solar cells of different size, depending on amperage and watt of panels, are needed to generate electricity in a typical solar cell. You can use a strong panel of aluminum that majorly serves as a back for solar panels. For making rigid solar panels, usually poly crystalline or monocrystalline solar cells are used. Former are made from thin wafers of multifaceted crystals of silicon that are less efficient from the latter one that is made of thin wafers of silicon that are 1 mm thick.

In southern hemisphere, solar panels used for generating electricity must face north, whereas those in northern hemispheres must face south to have maximum benefit of solar power or sunlight that is available.

The electricity that is produced by the solar panels is usually measured in kilowatts. Solar energy that is emitted by sun, on the surface of earth of 1 sq meter, has potential to produce 1,000wats of electricity. Solar panel's efficiency depends on the type of solar panel cells that are used in it. Electricity production of solar panels is affected by some of major factors that include clouds, sunlight, snow, and rain.

Solar cells produce electricity by using photoelectric effect. Pure crystalline silicon is not considered a good electricity conductor so atoms of some other elements are added to it. This results in making silicon a good conductor. Solar cells contain two layers of silicon with electrically conductive, transparent layer. After falling of sunlight on these layers of silicon, protons and electrons get excited and start moving in the layers and this flow basically results in the electric current. Moving charges are channelized by electrical contacts and create direct current that is used for charging batteries. This DC current is then converted into alternating current by feeding it to the inventor.

The silicon sheets are layered with the solar cells in such a way that n-type silicon layer is placed on one side whereas p-type on the corresponding side opposite to the n-type silicon layer. Sunlight that falls on solar cells, usually passes through one silicon layer, then transparent layer, and finally to the other silicon layer. In this way electrons are generated and in turn an electrical activity creates an electrical field surrounding the central sheet. Electrical current then starts flowing through the electrically conductive and transparent sheet. These inexpensive solar cells that are simple, easy to handle, and light are used by solar panels to generate electricity.

By: Mansi Saxena

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Solar Panels use has been increased in the last few years, understanding the importance of green energy.