Solar photovoltaic cells are the main energy source behind all solar systems, these cells were first given their start in calculators. Over the years evolved into a wide range of applications, the most popular of which is to supply electricity to homes and businesses from all over the world. The solar cells are made of a semiconductor material with silicon is most popular choice. When light strikes the semiconductor material it is the electrons in the solar panels. The resulting electron activity so strong that the electrons around the semiconductor current starts to produce the solar panel.
Now you must have energy produced in a cell is the power of the photovoltaic cell into usable energy. However, you must realize that solar energy is in the form of DC and must be guided first by an inverter into alternating current at 120 volts change. During this conversion a little bit of the electricity will be lost. Once the power of the inverter is a simple circuit is all that is needed to power your electrical devices.
If the power is not enough to cover your electrical requirements need to add more photovoltaic panels to increase the capability of the system. On the other hand, if your solar system produces too much electricity you actually sell it back to the power company. The energy companies are obliged by federal law to buy back excess energy, not only is this good for the earth, but this will help offset the cost of the system as well.
The use of photovoltaic cells to produce energy is an emerging technology that has a very bright future. As homeowners and businesses from all over the world trying to save money and operational costs of solar energy is increasingly reducing choice.
Source: http://ezinearticles.com/?How-Does-Photovoltaic-Solar-Energy-Work?&id=1020455 by Darin Sewell