Technological Changes in Four Links of Photovoltaics
In 2021, the photovoltaic industry will begin to see new technological changes in all aspects, which will bring new opportunities for the development of the photovoltaic industry.
In the field of silicon materials, granular silicon is mainly introduced. The cost of granular silicon is lower, mainly in terms of investment intensity, power consumption, and labor costs. The second is the feeding advantage. Feeding granular silicon can reduce the damage to the furnace wall and has better fluidity and more adaptability.
In the field of silicon wafers, single crystal and N-type ingots are cast. Ingot single crystal is complementary to Czochralski single crystal. There are four sources of silicon material used in ingot single crystals: ①Silicon materials that cannot be used for Czochralski single crystals, such as head and tail materials, scraps, etc.; ②Scrap generated by slicing; ③Return materials that cannot be used for single crystal silicon materials, such as pot bottom material; ④ scrapped component recycling material. Therefore, ingot single crystal is also the recycling of resources. Ingot single crystal combined with HJT is more cost-effective than PERC.
The new battery technology field includes Topcon, HJT, IBC, and perovskite. Topcon (Tunnel Oxide Passivated Contact, the conversion efficiency is higher than PERC, and can be compatible with PERC production line, the average conversion efficiency in 2021 will exceed 24%.
In terms of new component technology, the matching of the string welding process. The stringer is a device that connects photovoltaic cells in series through the welding tape. With the increase in the size of the battery and the increase in the number of busbars, the stringer equipment will usher in the need for upgrading. As of the end of 2020, the single GW investment in component equipment has dropped to 63 million yuan, of which stringer equipment is the core. It is expected that the module production capacity will expand by 95.1GW in 2021, corresponding to the stringer market space of 2 billion yuan.
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