Solar panelsSolar panels produce electricity from sunlight. The first artificial Earth satellite in the solar cells was launched in 1958, and until the late 1970's solar panels have been used primarily to supply satellite, lighting, and small electronic devices such as calculators and watches. In the early 1990's Germany and Japan have begun to stimulate programs for the implementation of solar panels, resulting in lower costs for those carriers of energy and has stimulated the growth of the industry in both countries.
In 2006, California adopted a program to introduce solar panels. The purpose of the program - providing a total of 3000 megawatts of energy by using sunlight. The program operates to this day.
Solar panels are widely used in rural areas not served by the electrical network. They are designed to completely eliminate the dependence of these areas from the normal power supply.
The main working principle is: when the light of the sun light falls on the elements of solar panels , direct current (DC) passes through the converter, which converts it to alternating current (AC). The resulting alternating current is fed directly to consumers and back-up battery, if they exist in the system.
Photovoltaic cells are the basis for solar panels. They consist of at least two layers of semiconductor material (usually pure silicon). One layer has a positive charge and the other a negative charge. When sunlight hits the solar panel, the photons of light absorbed by one layer of a semiconductor and a portion of their already transferred to another layer as the electrons. Thus was born an electrical current. Compiling multiple photovoltaic cells increases the current. This assembly is solar panel . |
|
