Solar Panels or PV panels come in various types and technologies.
The most common types are polycrystaline, mono crystaline and thin film which is itself made up of various technologies.
Our standard stock availability is made up of Polycrstaline modules.
Because of their reliability and quality – we stock the Eco Green Energy range as well as Yingli and Jinko.
WE CARRY A RANGE OF MODULES FOR BOTH OFF GRID AND GRID TIE APPLICATIONS
How it Works
Photovoltaics is the direct conversion of light into electricity at the atomic level. Some materials exhibit a property known as the photoelectric effect that causes them to absorb photons of light and release electrons. When these free electrons are captured an electric current results that can be used as electricity. The photoelectric effect was ﬁrst noted by a French physicist, Edmund Bequerel, in 1839, who found that certain materials would produce small amounts of electric current when exposed to light. In 1905, Albert Einstein described the nature of light and the photoelectric effect on which photovoltaic technology is based, for which he later won a Nobel prize in physics. The ﬁrst photovoltaic module was built by Bell Laboratories in 1954. It was billed as a solar battery and was mostly just a curiosity as it was too expensive to gain widespread use. In the 19605, the space industry began to make the ﬁrst serious use of the technology to provide power aboard spacecraft. Through the space programs, the technology advanced, its reliability was established, and the cost began to decline. During the energy crisis in the 1970’s. photovoltaic technology gained recognition as a source of power for non-space applications.
The diagram above illustrates the operation of a basic photovoltaic cell, also called a solar cell.
Solar cells are made of the same kinds of semiconductor materials, such as silicon, used in the microelectronics industry.
For solar cells, a thin semiconductor wafer is specially treated to form an electric ﬁeld.
Positive on one side and negative on the other.
When light energy strikes the solar cell, electrons are knocked loose from the atoms in the semiconductor material.
If electrical conductors are attached to the positive and negative sides, forming an electrical circuit, the electrons can be captured in the
form of an electric current — that is. electricity.
This electricity can then be used to power a load. such as a light or a tool.
A number of solar cells electrically connected to each other and mounted in a support structure or frame is called a photovoltaic module. Modules are designed to supply electricity at a certain voltage, such as a common 12 volts system.
The current produced is directly dependent on how much light strikes the module.
Multiple modules can be wired together to form an array.
In general the larger the area of a module or array, the more electricity that will be produced.
Photovoltaic modules and arrays produce direct-current (dc) electricity.
They can be connected in both series and parallel electrical arrangements to produce any required voltage and current combination.