For those who have just joined the photovoltaic industry, I think it is necessary to tell you the difference between monocrystalline silicon cells, polycrystalline silicon cells and amorphous silicon cells. If there is anything inappropriate, please forgive me.

 

From the appearance, the four corners of the monocrystalline silicon cell are arc-shaped, and the surface has no pattern; The four corners of polysilicon cells are square, and the surface has patterns similar to ice flowers; The amorphous silicon battery is what we usually call the thin film module. Unlike the crystalline silicon battery, the grid line can be seen, and the surface is as clear and smooth as a mirror.

 

Second: use the above differences

 

For users, monocrystalline silicon cells and polycrystalline silicon cells are not much different, and their service life and stability are very good. Although the average conversion efficiency of monocrystalline silicon cells is about 1% higher than that of polycrystalline silicon, because monocrystalline silicon cells can only be made into quasi square (the four sides are arc-shaped), there will be a part of the area filled when forming solar panels; Polycrystalline silicon is square, so there is no such problem. Their advantages and disadvantages are as follows:

 

Crystalline silicon module: the power of single module is relatively high. Under the same floor area, the installed capacity is higher than that of membrane module. However, the components are heavy and fragile, with poor high-temperature performance, poor weak light performance and high annual attenuation rate.

 

Thin film module: the power of a single module is relatively low. However, it has high power generation performance, good high temperature performance, good weak light performance, small shadow shading power loss and low annual attenuation rate. Wide application environment, beautiful and environmental protection.

 

Third: manufacturing process

 

The energy consumed in the manufacturing process of polycrystalline silicon solar cells is about 30% less than that of monocrystalline silicon solar cells. Therefore, polycrystalline silicon solar cells account for a large share of the total output of global solar cells, and the manufacturing cost is also less than that of monocrystalline silicon cells. Therefore, the use of polycrystalline silicon solar cells will be more energy-saving and environment-friendly!

 

In fact, there are many semiconductor materials for manufacturing solar cells. With the development of material industry, there will be more and more varieties of solar cells. At present, in addition to silicon series, there are many types of solar cells such as cadmium sulfide, gallium arsenide, copper indium selenium and so on. These materials are usually used to make amorphous silicon cells.

 

Therefore, when selecting photovoltaic modules, we suggest to select mature products of crystalline silicon photovoltaic modules according to the actual situation. There has been a debate about single crystal and polycrystalline. Our installers have little difference in the power generation capacity of household photovoltaic power generation system. The utilization area of single crystal will be relatively high and the area utilization rate of single crystal will be relatively good; The polycrystalline market has a high proportion, a wide range of applications and certain advantages in price. However, we should understand that for photovoltaic systems with the same power, the power generation is the same.