Standard solar panels
Solar cells are usually made of silicon. This silicon consists two layers. Under the influence of light, an electric current starts to flow between the two layers. That's why solar cells are also called photovoltaic cells (Greek photos: light, to the unit electrical voltage). In short therm you can say PV system. Another kind of PV are the elements made with the thin layer technology. Amorphous silicon is used for this. These elements have a lower efficiency, but are also significant cheaper. The efficiency from common solar cells is approximatley between 10% and 20%, where the cells with better efficiency usually are disproportionately more expensive.
The way how silicon is processed, determines the quality of the panel. There are three kinds of solar panels: monocrystalline, polycrystalline and amorphous (as already described above).
Polycrystalline: in a polycrystalline solar panel are solar cells that consist of several coarse crystals. A polycrystalline solar cell shows a kind of broken shards pattern. The polycrystalline solar panels are favorably priced and offer a reasonably high efficiency, although less efficiency than monocrystalline solar panels. When there is enough space on the roof, this will be the best choice.
Monocrystalline: these panels are more expensive, but have an higher efficiency per surface. The best choice for getting the maximum efficiency and a restricted area. The solar cells in a monocrystalline solar panel consist one crystal. The surface of monocrystalline solar cells has ordered electrodes and is equal black. These solar panels have the highest efficiency. Monocrystalline solar panels have a few percent more proceed.
Amorphous: in a thin film solar panel amorphous silicon is used. Amorphous solar panels do not have crystals but powder. This why there are very flexible. The amorphous solar panels give the most less efficiency from these three. The price is lower, but the solar cells are less suitable for use in solar panels.
Which options switch:
There are 2 possiblities for connecting the solar panels to each other and getting power.
- In series, here the panels are looped together and affect each other, but in general, less proceed.
- In parallel, it costs a little more but also proceeds 10 to 15% more.