Earth Electrical Services
PV Solar System Installations
generating electrical power by converting solar power
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Earth Electrical Services
Solar Panels for home use
Photo Voltaic Installations
 
home solar power systems
Vetted and approved by Trading Standards
Renewable Energy Assurance Ltd Listed
Proud members of Check-A-Trade
NAPIT Registered Electrician
home solar power systems

Solar Energy Conversion

Sunlight can be used to generate heat or produce electrical power. This is called solar energy. It is an environmental friendly way of energy production, which does not pollute the environment as so many other forms of energy production do.

 
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There are two forms of solar energy. Solar thermal, which uses sunlight to make heat and then also electrical power and Photovoltaic, which uses sheets of special materials to produce electricity from the sun. Photo means light, and voltaic means producing electricity.

 
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Solar Thermal

Solar Thermal systems use reflectors or mirrors to focus sunlight to exceptionally intense levels of heat. You can understand this better if you consider the example of using a magnifying glass to start a fire. Solar thermal systems use mirrors or reflectors to concentrate sunlight onto containers full of water (heating this water).

Sometimes other liquids are used, which retain heat better than Water. The liquids are heated up to high temperatures, and this produces steam. The steam is used to turn a turbine. The turning motion of the turbine is used to create electricity.

 
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Solar PV (Electrical Solar Panels)

Photovoltaic is from the Greek word (phos) which means light, Voltaic means, producing electrical current. The word is from the name of Alessandro Volta, an Italian physicist who was a pioneer in the subject of electricity in the 1700's. His name is also where the word "volt" comes from. Photovoltaic means, creating electric energy when exposed to light. 



A "cell" is a device that produces electricity. For example, Photovoltaic cells produce electricity when exposed to Sunlight. They normally come in the form of panels. The panels contain two layers of different materials (normally silicon). When Sunlight hits these two layers, one of the layers becomes positively charged, and the other becomes negatively charged. When a wire connects the two ends, they produce an electric current. When the two layers of material in a solar cell are exposed to light, they create an electric current. The AMOUNT of electricity generated by a solar power cell depends on several factors:

How big is the solar panel
How much surface is exposed to the sun
How strong is the sun (This depends on time of day, weather, latitude, etc.)
How long is the solar Panel exposed
How much obstruction is there to the light? (Clouds, mist, dust, dirt, etc.)



In other words, a solar panel generates electricity faster when the sun (or light) is brighter. Larger solar panels will produce more electricity than a smaller panel. Exposing the panel for a longer period of time will create more electricity than exposing it for a shorter period of time. A panel near the equator will be more effective than one in the pole regions. A solar panel in misty or dusty conditions will not create as much electric as it would in full, unobstructed sun. 



 
Earth Electrical Services
 

Solar Energy and the Future

If Solar Energy produced all of our electricity, we might not be so worried about global warming and the other destructive effects of pollution on the environment. These threats on the environment also pose a threat to mankind. Solar power could be developed to a point where, along with other forms of renewable energy, we could replace all harmful forms of electricity production.