What is photovoltaic solar energy?

Photovoltaic solar energy is the most important variety of the system used to produce usable solar energy. The understanding of the basic system is extremely important, because alternative energy sources to more frequent and necessary part of daily life. Photovoltaic solar energy to power can be anything from an outdoor solar light to use a whole city. Implement use of solar energy into human society is an important part of many government policies to move away from unsustainable energy use, environmentally friendly, sustainable existence.

The sun is a powerful energy source, burning a comfortable 93 million miles (153 million km) from Earth. While the planet receives energy to grow the plants from sunlight and convert that light into usable power takes some human technology. Photovoltaic systems are able to collect sunlight, convert it into energy, transport and for human use with basic scientific properties.

To create solar energy, a device called a photovoltaic or PV cells is necessary. The PV cell has a surface charged with extra electrons, and a second surface, which has positive atoms that lack electrons calculated. When sunlight on a PV cell and is absorbed, the extra electrons are excited, bouncing off the positively charged surface and the creation of an electric current, which satisfy the two emerged. This electrical power is solar energy, which can now be used as power.

PV cells can be arranged together to create power sources of various sizes. Small packages, called modules, can work be used to power electronics in just the same way a battery. Large groups of PV cells can be used to create to build solar arrays capable of enormous amounts of photo-voltaic solar energy. Depending on the size of the array and the amount of sunlight, can produce enough solar power to help homes, factories, or even strong run to the energy needs of an urban area.


Many scientists believe that photovoltaic solar energy is crucial for the survival of humanity. There is much dependent on the world comes from fossil fuels like oil and coal. take these fuels are formed from the decomposition of organisms and can create millions of years, people have over-stretched the available resources so that many forms of fossil fuels are exhausted. Some experts suggested that reserves of fossil fuels begin to run from the middle of the 21 Century, and will probably disappear completely within a few centuries. To safeguard the human-run energy company intact, up to science to discover ways to power the world with energy, which do not come not from fossil fuels.

Because solar energy is a renewable resource is an important area of ​​scientific research and development at the threshold of the 21st Century. Some suggest that the construction of a huge photovoltaic solar system in a consistently sunny desert might be enough electricity to run to create the world, although this cause problems. While a sufficiently large system could certainly generate enough energy to transport, it is much more difficult sentence in the world. Furthermore, as in the sunniest areas, it can have different prices of sunlight, the energy from the sun vary from day to day. In itself photovoltaic solar energy will not solve in a position to be the energy problems of the world, but in combination with other renewable energy sources like wind, biomass, algae, hydropower and geothermal energy, the days of fossil fuels world run may soon be distant memories.

source:wisegeek.com