Everyone has seen or used a calculator which uses solar energy and we know precisely how convenient they are. You don’t have to invest in new batteries and they appear to operate indefinitely, just as long as there is ample light.
You may also have witnessed the always increasing use of solar panels in larger sized units, such as emergency road signs, telephone boxes and light for car parking bays. More and more of these convenient gadgets are being powered by the sun instead of using the more traditional forms of electricity.
The question is: how do they work?
The answer is photovoltaics. This technology has been around since the late 1950s and was used largely in space, driving the electrical devices in satellites. These days, the technology is used in more ordinary applications. Many individuals are convinced that the power of the sun will one day be controlled to operate effective motor vehicles and that all of our energy demands will be cost free.
PV panels, also known as solar photovoltaic panels, generate electricity by means of the conversion of solar radiation into direct current (dc) electricity using semiconductors. This direct current is what we obtain from mains or grid power. An inverter is required to change dc power to ac, which is the type of electricity utilized for such applications as boats, electric cars and roadside emergency telephones.
Each of these solar pv panels have a quantity of cells and these cells consequently contain photovoltaic material. The most generally used materials are made of silicon. This material must be protected from the elements: generally this means it is packed snugly behind a sheet of glass. For scenarios where a greater quantity of energy is necessary, the panels are joined in arrays.
In the last decade, the manufacture of solar pv panels has come to be more efficient , as a consequence of a rising requirement for renewable energy sources. Photovoltaic panels are producing energy in over 100 countries internationally; despite the simple fact that this power source is but a tiny percentage of the world’s electricity production, it is the fastest developing technology of its sort.
These technological advancements have also resulted in agreeable information pertaining to the consumer : the size and quality of manufacturing has expanded, whilst the price tag of photovoltaic panels has lessened. A win-win situation!
Governments in several countries around the world have also brought in credits for purchasers to install solar pv panels, including rebates and feed-in tariffs. Rural towns and villages don’t have to rely on the typically prohibitive costs of connection to a grid when they use solar energy. This facilitates telecommunications access to all areas of the globe, both on land and at sea.
Photovoltaic panels also help in making roads less hazardous, with the use of emergency and warning lights to advise road users of road work or unsafe driving conditions. This in turn has the capacity to save lives, using a cost effective means.
In less developed regions of the world, solar energy is a cost effective means by which most of the population can have access to electricity and thereby lead a better quality of life. It enables electrification of schools and community centres. When people have access to reliable energy, it has the potential to lengthen the time by which productive work can take place, allowing for night time craft work to complement other types of income. In natural disaster scenarios, emergency medical relief teams are able to set up well equipped triage centres.
Photovoltaic panels have also been designed for recreational use: to power campsites for the adventurer or to produce a reliable power source for a computer when on the road.
As we witness non-renewable resources such as coal and gas disappear, it makes sense to take advantage of the sun’s rays.
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