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Comparison of monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar photovoltaic modules

Comparison of monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar photovoltaic modules

February 23,2021.
1. The difference in appearance

From the appearance, the four corners of the monocrystalline silicon cell panel are arc-shaped and the surface is not patterned; while the four corners of the polycrystalline series module are square corners with a pattern similar to ice on the surface; the amorphous silicon cell is also The thin-film module we usually talk about is not like a crystalline silicon battery where the grid lines can be seen, and the surface is as clear and smooth as a mirror.

2. Use the difference above

For users, there is not much difference between monocrystalline silicon cells and polycrystalline silicon series components, and their 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 solar panel can only be made into a quasi-square shape (all four sides are arc-shaped), there will be a part of the area when forming solar panels It is not full; polysilicon is square, so there is no such a problem. Their advantages and disadvantages are as follows:

Crystal silicon module: The power of a single module is relatively high. Under the same floor area, the installed capacity is higher than that of thin-film modules. However, the components are thick and fragile, have poor high-temperature performance, poor low-light performance, and high annual attenuation rate.

Thin film modules: The power of a single module is relatively low. But the power generation performance is high, the high temperature performance is good, the low light performance is good, the shadow blocking power loss is small, and the annual attenuation rate is low. The application environment is wide, beautiful and environmentally friendly.

3. The difference in manufacturing process

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

In fact, there are many semiconductor materials available for manufacturing solar cells. With the development of the material industry, there will be more and more varieties of solar cells.

The solar cells panel that have been researched and trial-produced include many types of solar cells such as cadmium sulfide, gallium arsenide, copper indium selenium, etc., in addition to the silicon series. These materials are usually used to make amorphous silicon cells.

Therefore, when we choose solar photovoltaic panel, we recommend choosing more mature products of crystalline silicon photovoltaic modules according to the actual situation. There have been controversies about monocrystalline and polycrystalline. Our installers do not have much power in the household photovoltaic power generation system. The difference is that the utilization area of single crystal will be higher, and the area utilization rate of single crystal will be better; the proportion of polycrystalline market is relatively high, the application is relatively wide, and there are certain advantages in price, but we must understand that for the same The power of the photovoltaic system is consistent with the power generation.

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