Components of solar panels
Let's take a look at the components of the photovoltaic panel: 1. Tempered glass, 2. EVA 3. Cells 4. EVA 5. Backplane 6. Aluminum alloy protective laminate 7. Junction box 8. Silicone. What are the specific functions of these components, let us explain separately:
1. Monocrystalline solar panels
The components of the monocrystalline solar panel are the same, except that the solar cells are made of monocrystalline silicon. (Q: What is single crystal silicon? A: Single crystal of silicon. A crystal with a basically complete lattice structure. It has different properties in different directions and is a good semiconducting material. The purity is required to reach 99.9999%, or even 99.9999999% or more. Used in the manufacture of semiconductor devices, solar cells, etc.. It is made of high-purity polycrystalline silicon drawn in a single crystal furnace.) The advantage of monocrystalline silicon is that the conversion rate is higher than that of polycrystalline silicon. It can be used in the same area. Send more electricity! Reduced land rent and support costs. And in terms of performance (attenuation, etc.) slightly better than polysilicon, but in terms of manufacturing cost, it is higher than polysilicon. Therefore, the price of monocrystalline solar panels is higher than that of polycrystalline silicon solar panels!
2. Polycrystalline solar panels
The composition and structure of the polycrystalline solar panel is exactly the same as that of the monocrystalline solar panel, except that the solar cell is made of polycrystalline silicon. After the launch of polycrystalline solar panels, because of its low price, and the performance is not very different from that of single crystal! The market has always been very popular. And because of the continuous innovation of technology in recent years, the performance and conversion rate of polycrystalline silicon solar panels are not very different from those of polycrystalline silicon panels, and they are almost negligible. However, there is a big difference in price (the price of single polycrystalline before the 531 New Deal could differ by a few cents per watt). Therefore, polysilicon is more popular in the market. (However, after the 531 New Deal, due to the excessively high price of monocrystalline solar panels and the poor profitability, the price of monocrystalline solar panels was reduced by a relatively large margin. As of November, the price difference of single-polycrystalline solar panels was not very large.)
Three, thin-film solar panels
The price of thin-film solar panels is still higher than that of silicon crystal solar panels. And there is no advantage in conversion rate, but its impact on low-light effects and sunlight shading is better than single and polycrystalline solar panels! It is more suitable for use in areas where the geographical location is poor and there are shadows all the year round.
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