You have more than likely seen or made use of a calculator which uses solar energy and you would know precisely how handy they are. There is no need for replacement batteries and they appear to work for ages, just as long as there is ample light.

Maybe you have also observed the an expansion in the use of solar panels in more substantial devices, such as emergency road signs, telephone boxes and illumination for car parking bays. An increasing number of these useful products are now powered by the sun rather than using the more standard types of electricity.

So, you ask: How do these things work?

The answer is photovoltaics. This technology has been in operation since the late 1950s and was employed largely in space, operating the electric powered devices in satellites. Currently, the technology is utilised in more ordinary applications. Some people are convinced that the energy of the sun will one day be harnessed to run effective motor vehicles and that more or less all of our energy needs will be without charge.

PV panels, also known as solar photovoltaic panels, produce power by way of the conversion of solar radiation into direct current (dc) electricity making use of semiconductors. This direct current is what we obtain through mains or grid power. An inverter is needed to turn dc power to ac, which is the form of electricity used for such functions as boats, electric cars and roadside emergency telephones.

Each of these solar pv panels comprise a quantity of cells and these cells in turn contain photovoltaic material. The most generally used materials are made up of silicon. This material must be protected from the ravages of weather: usually this means it is crammed snugly behind a sheet of glass. For circumstances where a more significant quantity of electrical power is required, the panels are linked in arrays.

In just a decade,the production of solar pv panels has become increasingly efficient, as a result of a rising demand for renewable energy sources. Photovoltaic panels are generating electrical power in over 100 countries globally; irrespective of the fact that this energy supply is but a miniscule fraction of the globe’s electricity production, it is the fastest developing technology of its form .

These technological improvements have additionally resulted in agreeable information for the consumer : the scale and excellence of production has grown, whilst the cost of photovoltaic panels has decreased. A win-win situation!

Authorities in several countries internationally have additionally announced rewards for purchasers for the installation of solar pv panels, including rebates and feed-in tariffs. Rural areas and villages don’t have to depend upon the often prohibitive expense of connection to a grid when they make use of solar energy. This allows telecommunications accessibility to all regions of the earth, both on land and at sea.

PV panels also help in making roads less hazardous, with the use of emergency and warning lights to advise road users of road work or dangerous driving conditions. This in turn can have the potential to save lives, using a cost effective means.

In developing nations, solar energy is a less expensive means by which the majority of the population is able to have access to electricity and as a result lead a better quality of life. It enables electrification of schools and community centres. When people can access energy, it can extend the time by which productive work can take place, enabling night time craft work to supplement other forms of income. In natural disaster scenarios, emergency medical relief groups are able to establish well equipped triage centres.

Photovoltaic panels have also been developed for use in recreational activities: to power campsites for the more adventurous or to deliver a trustworthy power source for a computer when on the road.

As we see non-renewable resources such as coal and gas dwindle, it makes perfect sense to take advantage of the sun’s rays.