[Zhongbo.com] Solar photovoltaic glass is a low-iron silicate glass, also known as ultra-white embossed glass. It consists of low-iron glass, solar cells, film, back glass, and special metal wires. It is a new type of glass that converts solar energy into electrical energy.
Photovoltaic glass has a strong application on crystalline silicon solar cells. Since the crystalline silicon battery itself has poor mechanical strength and is easily broken, the moisture and corrosive gases in the air gradually oxidize and rust the electrodes, and cannot withstand the harsh conditions of open air work. For this reason, the solar cells are usually made of photovoltaic glass through the EVA and the back sheet. Package. Photovoltaic glass protects the battery from moisture attack, oxygen inhibition, oxidation resistance, high and low temperature resistance, good insulation and aging resistance.
At the same time, photovoltaic glass is increasingly used in many areas such as building curtain walls, showcases, photovoltaic roofs, sunshades, solar power systems, etc. due to environmental factors such as dust, moisture and snow.
Advantages and disadvantages of photovoltaic glass itself
advantage:
1. Beautiful appearance
Since the iron content in the raw material is only 1/10 or less of ordinary glass, the amount of impurities is small. Photovoltaic glass absorbs less of the green band in visible light than ordinary glass, ensuring the consistency of the color of the glass.
2. High visible light transmittance and good permeability
It has a visible light transmittance of more than 91.5% and has a crystal clear crystal quality.
3. Low UV transmittance
Compared with ordinary glass, photovoltaic glass absorbs less in the ultraviolet band, and is used in places where ultraviolet rays are protected, such as museums, etc., which can effectively reduce the passage of ultraviolet rays and slow down the fading and aging of various exhibits in the showcase, especially for cultural relics protection. The effect is more obvious.
4. Large market, high technical content, strong profitability
Photovoltaic glass technology is relatively high in content, difficult to control production, and has a relatively strong profitability compared to ordinary glass.
Disadvantages:
1. Production is difficult
One of the shortcomings of currently widely used photovoltaic glass is that it has a certain self-explosion rate. If the tempered photovoltaic glass self-explosion on the photovoltaic module, it will cause fatal damage to the photovoltaic module, and the loss value is large. In addition, the continuity of glass production is very strong, and the quality of photovoltaic glass finished products needs to be rebuilt, which will bring additional costs to the production enterprises.
2. High requirements on production scale
At present, the photovoltaic glass industry has formed a large-scale competition pattern, and large-scale enterprises can win market competition in terms of product quality, supply and price.
3. Long certification period
As an integral part of photovoltaic modules, photovoltaic glass needs to be equipped with component products to enter the certification process. PV modules exported to the European Union, the United States, and Japan must obtain local product quality certification, and replacement of the packaged glass must be re-certified, with a long cycle and high cost.
4. High dependence on policy subsidies
Since the current cost of solar power generation is still higher than that of conventional energy sources, in order to promote the development of clean energy, the world's major PV markets, including China, have subsidized the use of solar energy. Once governments cancel or reduce financial subsidies, Will affect the installed capacity of the photovoltaic market, which will have an impact on upstream component companies, photovoltaic glass enterprises. 
Solar photovoltaic glass development in China
As an important branch of the photovoltaic industry, the photovoltaic glass industry started late in China. Before 2006, China's photovoltaic industry began to take off. At that time, the technical barriers of glass in the photovoltaic industry were relatively high, and the domestic market demand in China was not large. There was no domestic enterprise producing photovoltaic glass, which basically relied on imports. At that time, photovoltaic glass The import price is as high as 80 yuan/m2. Around 2006, China's photovoltaic industry began to develop. Under the stimulation of demand and profits, Chinese domestic enterprises began to introduce and research and develop photovoltaic glass, and further put into production, realizing the localization of photovoltaic glass. Around 2017, after ten years of development and precipitation, China's photovoltaic glass has established itself in the domestic market and has begun to gradually move into the international market.
Today China is already a global PV glass producer, and more than 90% of the world's crystalline silicon components use photovoltaic glass produced in China. China's photovoltaic glass has obvious advantages in comparison with foreign companies in terms of quality and cost.
The government's policy encouragement on renewable energy is a key driver of the global solar photovoltaic glass market. This may be the main driving force of the solar photovoltaic glass market in the future. The research of products cannot be separated from the strong support of the government.
Solar energy is gradually becoming the mainstream new energy source for clean energy. As far as technology is concerned, all solar cells need glass for packaging, and the impedance is natural such as wind, rain and snow. The destruction of hail and the like can ensure sufficient sunlight transmission rate while protecting. As the substrate material of solar photovoltaic conversion system, photovoltaic glass has fundamentally promoted the continuous expansion of the production scale of the world photovoltaic industry.
With the maturity of the industry's technical framework, the price of solar photovoltaic glass is also gradually decreasing, which will also become the main driving force for the development of the solar photovoltaic glass market. China's current residential sector is more sensitive to innovative products such as solar photovoltaic glass than industrial and commercial sectors, so the sector will likely dominate the solar PV market.
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