Tongwei Solar (TW Solar) is dedicated to R&D, manufacture and marketing of core solar products. As the worldwide largest crystalline silicon solar cell production enterprise, Tongwei Solar has four bases (Hefei, Chengdu, Meishan and Jintang) and approximately 9,000 full-time employees. By the end of 2019, the overall capacity of Tongwei Solar has reached 20GW, accounting for 11% of global market share. Tongwei Solar has the biggest capacity and shipment in the industry since 2017.
Up to now, TW Solar has achieved sustainable profit, full production with sales and operation rate of 100% consecutively in 72 months， and is rated as the best global supplier and the enterprise exempted from inspection for solar cells for 5 consecutive years. Moreover, major safety accidents and concerning environmental problems have not been seen for 6 consecutive years, setting a new record in PV industry.
I. Tongwei Solar (Hefei)
TW Solar Hefei base, located in Hefei Hi-tech Industry Development Zone, Anhui province, was put into operation from November 18, 2013 and now has more than 6GW capacity.
Phase I of Hefei Base has 5 poly-crystalline silicon cell production workshops with 40 production lines, ranking top of the line in PV industry.
As Phase II of Hefei base finished construction on January 8, 2019, Tongwei Solar started the project of 8GW high efficiency crystalline silicon solar cell. This project fully adopts Rear Passivation technology and features in high efficiency mono-crystalline silicon cell unmanned manufacturing, smart factory and digitalized workshop, which will further increase efficiency and boost profitability and consolidate the leading place in high efficiency crystalline silicon solar cell production.
II. Tongwei Solar (Chengdu)
TW Solar Chengdu Base (with 10GW capacity) is located in Shuangliu District, Chengdu, Sichuan province., which is the worldwide biggest manufacturing base of crystalline silicon cell.
Phase I of Chengdu Base was put into operation from June 30, 2016. It took only 7 months to complete construction, which won positive media reviews of “Tongwei Speed”, “Shuangliu Speed” and “Chengdu Speed”. In addition, it has become a model project in global PV industry in terms of fast construction, fast production and fast profitability.
Phase II of Chengdu Base was put into operation from September 20, 2017. It took only 7 months to complete the project even in the case of doubled amount of production capacity and construction works, which further refreshed the record of construction period. The production line of Phase II has been upgraded to automated manufacturing, becoming the model project of “smart manufacturing” in Chengdu. In addition, it pioneers in building digital workshop and smart factory and achieves the goal of clean energy “Made in Chengdu”.
Phase III of Chengdu Base was put into operation from November 18, 2018 after 6 months’ construction period. This project adopts PERC technology and focus primarily on smart manufacturing of high efficiency mono-crystalline silicon cells and building smart factory and digital workshop. It has become the largest single high efficiency crystalline silicon solar cell project that takes the leadership in production technology, equipment, automation and intelligent degree in global PV industry.
Phase IV of Chengdu Project came into operation on November 18, 2019, taking only 7 months to build. This project was newly built, completed and put into production in 2019, which renewed the record of a single workshop’s manufacturing capacity, ranking Tongwei Solar as the most productive single workshop, the most advanced technical skills and production user, the most unmanned and intelligent workshop and an global representative of PV industry. There are totally 16 digitalized production lines producing large-size cell with lower cost and better performance, which consist of automatic mechanical arms and intelligent carrier robot, further contributing to the smart, intelligent，modernized and elaborative management of Tongwei Solar.
III. Tongwei Solar (Meishan)
Meishan Project was Located in Ganmei Industrial Zone, Meishan, Sichuan Province. On January 25th, 2019, Meishan Government, Ganzi Government and Tongwei Group were present at the signing ceremony of Tongwei high-tech green industry park(10GW high performance crystal silicon cells project). On March 27th, 2019, the project started construction. On the April 24th, the first phase of the project was put into production while the second phased started construction. From the first meeting of the project, it took only 36 days to confirm investment, 50 days to sign the contract and 110 days to start construction, which created the new Tongwei Speed and Ganmei Speed of investment.
With Phase I of Meishan project was put into operation, Meishan created the worldwide record of the biggest capacity (7.5GW) of crystalline silicon solar cell within single workshop. This project is based on multiple competitiveness of Tongwei solar (including years of research, practice, marketing and etc.) and mainly focuses on unmanned intelligent manufacture, along with supporting facilities including intelligent production lines, digitalized workshops, logistics and other related facilities. Phase I of Meishan project takes 80,000m? (the whole project takes160,000m? in total) and has the biggest capacity within one single workshop. As the worldwide largest size workshop, phase I has 16 fully closed intelligent high-performance crystalline silicon solar cell production lines that are all equipped with automatic mechanical arms and intelligent carrier robots and produce big size solar cells, aiming to build the worldwide most intelligent, energy conservative and environmental protective green factory and produce solar cells with the highest performance.
IV. Tongwei Solar (Jintang)
Jintang project was located in Huaikou town, Jintang County, Chengdu City. This project with 30GW high-performance crystalline silicon solar cells will be constructed in the following 3-5 years with investment of 20 billion RMB, adding 70 billion RMB of new assets for Tongwei, providing 10000 employment opportunities, contributing 2 billion RMB of tax. Phase I (7.5GW) started construction on February 25th, 2020, and is estimated to finish construction by the end of 2020 and to operate in the first season of 2021.
Tongwei takes Jintang project as a pilot, actively developing 5g applications in the field of industrial Internet, setting a model of 5g + advanced manufacturing industry, contributing to the construction of PV green smart town basing on Tongwei industrial manufacturing scene.
Jintang project aims to build a major production base of PV products in Chengdu with spectrum of western region of China and faces European market, making full use of Chengdu as the bridge of Chengdu-Chongqing economic circle, the starting station of China-Europe Express international railway and other advantages like hydropower, etc.
After completion, Jintang project will be the first 100 billion level industrial cluster of eastern new district, providing important industrial support for the high-quality development of Chengdu-Chongqing economic circle.
V. Honors and Achievements
With the competitive research team consisting of prestigious specialists and scholars of the industry, Tongwei Solar has achieved numerous technical achievements with independent intellectual property rights including Atomic Layer Deposition for Rear Passivation, Selective Emitter Technology, Black Silicon Technology, Bifacial Solar Cell, Multi Bus-bar Technology, Heterojunction Technology, High power module, etc.Accredited by National Center of Supervision and Inspection on Solar Photovoltaic Product Quality (CPVT), Tongwei Solar’s self-developed high efficiency solar cells and module has broken the world record twice. On June 20th, 2019, Tongwei’s first piece of self-developed HJT solar cells was successfully made and won the Leading enterprise award for promoting Heterojunction solar cell industrialization in 2019.
Up to now, Tongwei Solar has accumulatively obtained 279 patents（38 for invention and 241 for utility model）and 53 software copyrights.
For the past 6 years, Tongwei Solar has been awarded 280 national and provincial honors, including National Green Factory, Integration of Informationization and Industrialization Management System Pilot Enterprise, National 5-star Factory, National User Satisfied Enterprise, National High-tech Company, the 7th China Green-Benefit Enterprise, China Trustworthy Group for Quality, China Quality Encouragement Award, Sichuan Province 5-star Factory, Anhui Province Quality Award and etc.
Tongwei Solar received great feedbacks from the market and was awarded as High Quality Supplier by many clients including Jinko Solar, GCL System Integration Technology, Canadian Solar, Trina Solar, Suntech, ChinaLand, SolarGiga Energy, Risen Solar and etc. Globally, Tongwei Solar has been accredited and certified by CE, CSA, TüV, JET,SGS,CQC and etc.
As the worldwide largest solar cell production enterprise, Tongwei Solar outstripped other companies with 10GW overall shipments in 2019. According to PV InfoLink, Tongwei has kept the record of largest manufacturing capacity and output in the industry for 3 consecutive years.