What is difference between mono and poly solar panels ?
Release：2017/01/19 Company News
Solar Cell module, so-said solar panel, solar pv module as well, main include polycrystalline solar panel, monocrystalline solar panel, thin film solar panel. Presently, polycrystalline solar module still occupy the main position in market.
There are many reasons to cause the market of mono solar panel smaller the poly solar panel.
(1), The manufacturing technique of mono is more complicated than poly, cost is higher than poly. (2), In the primary stage of development of solar industry, production capacity is more important for market, the exquisite monocrystalline solar panel is difficult to meet the market request for fast expansion. The battery cells technique of poly solar panel rapidly expand in market basing on the relative low cost, which makes it be dominant in market.
Nevertheless, Mono solar panel have more high performance. The technique of monocrystalline was verified to be reliable over 30 years application practice. It was in 1982 that the first PV system was completed in Europe, the panel was to adopt monocrystalline solar system; In China, solar power station also adopted monocrystalline solar system in 1980s. Data indicates that the total attenuation rate of the mono solar system which was established in NingBo China,1994, is just 3.1% during 21 years; The average attenuation rate of monocrystalline solar roof which was established at München, Germany in 1997 is just 0.4% each year. The attenuation rate performance of mono is better than poly.
The ranging of poly silicon is at random, it may occur crack under alternating of high and low temperature in the long term. While, the silicon structure of mono solar panel have more mechanical capacity than poly, more performance for crack resistance. Totally, the generator unit of monocrystalline is higher than polycrystalline about 5 percent. The generation advantage of mono solar panel is basing on low temperature working, low light performance reaction, low cells crack, low attenuation rate, etc. The temperature difference is 3 ~ 5 degree under high temperature condition, while the power of solar module will decrease 0.4% ~ 0.45% when temperature increase each degree. In terms of attenuation rate from long term, the average attenuation rate of mono solar module is 0.55 percent, poly solar panel is 0.73 percent from the second year.
Moreover, the obvious to save land area, construction materials, project, installation cost, etc also can express the economy of mono panel. According to calculating measure, the project of 50MW mono solar panel can save 66000m^2 land area, save 160 ton rolled steel and 40km wires, and also save 50% labor cost.
For a long time, poly solar panel have more cost advantage than mono, investors pay more attention the initial investment in the past, therefore, the lower cost poly solar panel is more popular. While most of investors have changed their mind presently, they attention more the average electric cost from whole of module lifespan, the advantage of mono solar panel would be dominant under this circumstance.
Considering the conversion rate and manufacturing cost for poly and mono solar panel, presently, poly and mono also have more sophisticated techniques. The cost of mono solar panel don’t have more high difference with poly solar panel in 2016, it is difficult to assess which one is better for mono and poly. How to choose is according to the local environment and project budgets.
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