Photovoltaic panels are those main component of solar boards to absorb the sun light ray. The photovoltaic panels generating the beams of sunshine to DC current.

The solar modules represent the heart of the photovoltaic system, here the conversion of sunlight into electricity takes place. In the past 20 years, photovoltaics has developed from a niche technology to a mass technology with high growth rates worldwide. During this time, technical progress in photovoltaic modules was more evolutionary than revolutionary. The efficiency and service life of the photovoltaic modules have been continuously improved in small steps, which is why today's solar modules are without any doubt of a significantly better quality than their predecessor models. In order to generate enough solar power, many solar cells are interconnected. Depending on the material used, one speaks of polycrystalline, monocrystalline or thin-film modules.

Polycrystalline solar modules

Polycrystalline photovoltaic modules offer a very good price-performance ratio. To manufacture polycrystalline cells, the raw material silicon is melted, poured into blocks and then sawn into disks. When it cools down, crystals of different sizes form. Impurities lead to a lower degree of efficiency compared to monocrystalline solar modules. Nevertheless, polycrystalline photovoltaic modules have the largest market share, as the price per kilowatt peak is particularly low. Polycrystalline solar modules are the right choice, especially when there is enough roof space. In addition, the efficiency is getting better and better thanks to new developments and constant research. The efficiency of polycrystalline solar modules is currently between 12 and 16 percent.

Monocrystalline solar modules
In the production of monocrystalline solar modules, a block consisting of a so-called monocrystal is drawn from the molten silicon. This eliminates defects at the crystal boundaries and significantly higher efficiencies can be achieved. However, the manufacturing process is more complex and the photovoltaic modules are therefore more expensive. Monocrystalline solar modules are the right choice, especially when there are space or static problems. The average efficiency is between 14 and 18 percent.