The main function of solar cells in the light energy into electricity, this phenomenon is called the photovoltaic effect. In many solar cells in the more common and more practical monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells and other three, in the sunny sunshine good sun and the east of the region, the use of polysilicon solar cells as well Polysilicon solar cell production process is relatively simple, the price is lower than the single crystal. Conversion efficiency has been improving in recent years. In the rainy days more sun is relatively not very adequate in the southern region, the use of monocrystalline silicon solar cells as well, because the monocrystalline silicon solar cell electrical performance parameters are relatively stable. Of course, amorphous silicon solar cells in the indoor sun is very weak case is better, because the amorphous silicon solar cells on the sun light conditions require relatively low.