Solar electricity is derived from the conversion of sunlight through (PV) photovoltaic technology. Photovoltaic systems utilize the power of sunlight to power electrical equipment, such as lights, computers, and household appliances. The photovoltaics process solar energy that is free, into solar power directly. Solar energy is the most plentiful source of energy in the world, but it should be noted that solar energy is not the same as thermal technology that powers solar electricity, which is passive. This technology is commonly used for the production of hot water and space heating.
The basic operation of PV cells brings together a minimum of two thin layers of semi conducting material, most often silicon. When light is exposed to these layers, electrical charges are generated, being conducted away through metallic contacts, in the form of a direct current. Single cell electrical output is small; therefore, multiple cells are encapsulated and connected together behind glass, to form panels, or modules. The PV panel is the common denominator of PV systems, and any amount of panels connected together give the desired output of electricity.
There are several PV cell types. The cells made out of Monocrystalline silicon, are the most efficient of the available PV cell technologies. They have an efficiency rate of about 15%, and have a complicated manufacturing process that makes them more costly than other PV cells. Multicrystalline cells made of silicon are more cost effective to manufacture. However, they carry a generally lower efficiency rate, at about 12%, and create a granular texture. Amorphous silicon can be used in a wide range of ways, such as flexible and rigid substrates. It is less efficient at about 6%, but is easier to produce, at a lower cost. The other PV cell types are thick films of silicon, copper indium diselenide and cadmium telluride. As you can see, there are many materials currently used to produce PV panels.
Solar electricity is used to power city buildings and remote stations that relay telecom applications. When connected to localized networks, solar electricity can be sold to supply companies, or used immediately, during daylight hours. In the nighttime, with lower solar electricity generation, the power can be repurchased from the localized networks. The grid therefore becomes a storage system for solar electricity, negating the need for battery storage inclusion in PV systems.
Photovoltaic equipment that makes up solar electricity panels also contain no parts that move, and consequently needs minimal maintenance. Solar electricity is generated without the production of greenhouse gas emissions, with an operational noise level that is virtually non-existent.
Cost Of Solar Electricity
Residential solar electricity is usually seen as an investment. The fact that it is a kind of electricity that helps cut down on electricity bills is a big reason why many people consider it as an investment. People who may be interested in having power in their homes that does not bring about air pollution, has no noise, and does not need maintenance will love electricity produced by solar power.
A solar electrical system is absolutely renewable---meaning that it will never run out. That kind of system is also environment friendly because it aids in the reduction of greenhouse gases and other pollutants. People who are nature lovers and believe in going green will definitely place the solar powered system on the top of their list.
The energy gained from a solar electrical system is more often than not called the photovoltaic energy. A solar electrical system may also be referred to as a photovoltaic system. The system is able to give direct current (DC) electricity through freed up electrons that result from the combination of the photons from sunlight and the silicon atoms from solar panels that are made from semiconductor materials. A standard photovoltaic system may also be composed of an inverter and batteries aside from solar panels.
Some people may wonder why there is the need for an inverter in a solar powered system. Since there are two types of electricity, namely: direct current electricity (DC) and alternate current electricity (AC), there is a need to convert either of the two into the second form.
For example, most of the appliances in the household use AC electricity. Since DC electricity is produced by a solar electrical system, the inverter needs to convert it into AC electricity to give power to the appliances in your house. DC electricity may only be used by small appliances like flashlights, rechargeable lamps, etc. Inverters are of two types: the UPS inverter which relies on batteries, and the Grid-tied inverter which relies on the utility grid to store power.
Many people may also be curious about the total amount of power that a photovoltaic system may be able to provide. The answer, of course, lies on the size of your system. The total amount of electricity a user needs regularly and the total amount of sunlight in his location will also affect the amount of power that a solar powered system will be able to give. It is more feasible to say that the most effective system is one that is used to support around 50% to 75% of the total amount of power your household needs.
If you feel that energy conservation is important and if you want to be able to save more, residential solar electricity may be a good idea. Right now, more and more people feel the need to use a solar powered system in supporting most of their homes' electricity needs. Who would blame them, when the truth is that gaining electricity from a solar powered system is a money saver.
Both Art Gib & Y.t. Lee are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.
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