Solar Power

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Solar Power How It Works

Solar power How it works seems like a mystery to some, but we've all seen it used to power everyday things like calculators. It is also used to supply electricity to the appliances and lights we use in our homes.

Even utility companies use solar power to supplying hundreds of houses with megawatts of electricity.

If you decide to power your house with a solar electric system, you will receive FREE power from the sun, once your system is paid for.

Here are two of the most frequently asked questions for solar power how it works.

How is solar energy used?

1.) Solar energy works by converting the sun's rays into electricity with the use of solar panels to supply power to the appliances use in our homes.

2.) Solar energy works by converting the sun's rays into heat with the use of solar thermal collectors for warming water, i.e. for the swimming pool.

3.) Solar energy works by converting the sun's rays into hot air for heating buildings with the use of solar thermal collectors.

How do solar panels work?

1.) Rays of sunlight hit the solar panel (also know as a photovoltaic/ PV) and are absorbed by semi-conducting materials such as silicone.

2.) Electrons are knocked loose from their atoms, which allow them to flow through the material to produce electricity. This process whereby light (photo) is converted into electricity (voltage) is called the photovoltaic (PV) effect.

3.) An array of solar panels converts solar energy into DC (direct current) electricity.

4.) The DC electricity then enters an inverter.

5.) The inverter turns DC electricity into 120-volt AC (alternating current) electricity needed by home appliances.

6.) The AC power enters the utility panel in the house.

7.) The electricity (load) is then distributed to appliances or lights in the house.

8.) When more solar energy is generated that what you're using - it can be stored in a battery as DC electricity. The battery will continue to supply your home with electricity in the event of a power blackout or at nighttime.

9.) When the battery is full the excess electricity can be exported back into the utility grid, if your system is connected to it.

10.) Utility supplied electricity can also be drawn form the grid when not enough solar energy is produced and no excess energy is stored in the battery, i.e. at night or on cloudy days.

11.) The flow of electricity in and out of the utility grid is measured by a utility meter, which spins backwards (when you are producing more energy that you need) and forward (when you require additional electricity from the utility company). The two are offset ensuring that you only pay for the additional energy you use from the utility company. Any surplus energy is sold back to the utility company. This system is referred to as "net-metering".

To find out more about Solar Energy, please visit Facts About Solar Energy today.

About the author, The author is commited to educating people about the benefits of using Solar Energy through her website http://facts-about-solar-energy.com/

Photovoltaic Systems - Energy from the Sky

As people search for alternatives to fossil fuel energy, solar energy emerges as one of the cleanest and most practical sources of electricity. Solar panels can be installed on rooftops or any area that receives a lot of sunshine. The solar panels consist of a photovoltaic system that converts the energy of the sun into electricity.

Photovoltaic systems have existed since the 1950s but only in recent years has the technology matured to the point of making it a viable alternative to power utilities. Indeed, most solar systems do not replace the utility company, instead they work in conjunction with it to produce extra electricity that can be fed back into the grid.

One of the main problems with solar power is storing it for use during non-daylight hours. Batteries can be used but they are expensive and have a limited life span. As an alternative, excess solar electricity can be fed back to the power utility company for a credit, and then power can be drawn when needed. In a sense, the utility company becomes the storage device.

Most municipalities have legislation requiring power utility companies to accept electricity produced by solar panels or wind turbines. This system benefits everyone - there is less dependency on fossil fuel power plants and electricity costs are reduced for owners of photovoltaic systems.

Photovoltaic cells produce electricity by using specially treated materials such as silicon that convert light into power. They can be of almost any size and are suitable for providing electricity for small items such as calculators or watches right up to complete industrial complexes. Because they can be wired together, an array of solar cells can produce enough electricity for residential or commercial needs.

The main requirement, of course, is sunlight. This makes solar power most practical for southern areas such as California and Arizona. But it can also be used in more northerly areas as a backup power system. As the technology advances, photovoltaic cells are able to produce usable amounts of electricity even in low light conditions.

About the author, Ross MacIvar is the leading author of http://www.alternative-energy-guide.com/