Green Energy Industry Chain
Tongwei entered the market of photovoltaics (PV) in 2006. After more than ten years of rapid development, Tongwei has become a integrated PV enterprise with high-purity polysilicon production in upstream and high-efficiency solar cell production in midstream and high-efficiency PV module production in downstream , as well as experience in PV power plant construction and operation. It has formed a complete PV new energy industry chain with independent intellectual property rights and leading scale, technology, cost and quality advantages.
High-purity crystalline silicon production
Construction and operation of terminal photovoltaic power plants
High-efficiency solar cell production
High-efficiency module production
Green Energy Industry Chain
- Upstream: High-Purity Crystalline Silicon
Yongxiang
High-purity Crystalline Silicon, Leads the World
High-purity Crystalline Silicon, Leads the World
Tongwei's Yongxiang has three high-purity crystalline silicon production
bases in Leshan (Sichuan), Baotou (Inner Mongolia), and Baoshan (Yunnan). Tongwei's silicon products cover both electronic and solar grades,
representing the excellence of high-purity crystalline silicon
"intelligent manufacturing in China".
bases in Leshan (Sichuan), Baotou (Inner Mongolia), and Baoshan (Yunnan). Tongwei's silicon products cover both electronic and solar grades,
representing the excellence of high-purity crystalline silicon
"intelligent manufacturing in China".
420000tons
Annual production capacity of high-purity crystalline silicon
NO. 1
Production capacity in the world
Yongxiang
Create a world-class leading enterprise of high-purity crystalline silicon
Create a world-class leading enterprise of high-purity crystalline silicon
Sichuan Yongxiang Co., Ltd. was established in November 2002. After 20 years of development, Sichuan Yongxiang has formed a circular economy industry chain that combines new energy and chemical industry from "halogen, caustic soda, polyvinyl chloride to calcium carbide slag cement" and from "hydrogen chloride, silicon trichloride to polysilicon new energy."
Five core advantages, achieve high-purity crystalline silicon "intelligent manufacturing in China"
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Cost AdvantageMaximizing cost reduction and efficiency enhancement through advanced technological processes, the comprehensive cost is at the forefront of international standards.
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Industrial AdvantageCircular economy industry chain with the complete combination of new energy and chemical industry in China, and smooth industry chain in the upstream, midstream, and downstream within the group.
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Technology AdvantageTongwei introduced advanced technology and equipment from abroad, combined with mature domestic technology to develop and improve the new polysilicon technology, and successfully iterated the "Yongxiang Method" to the seventh generation. Cold hydrogenation, silicon trichloride synthesis, disproportionation, large-scale energy-saving rectification and efficient reduction, tail gas recovery, automatic control technology of electrical appliances, closed-circuit circulation of hydrogen chloride, comprehensive utilization technology of heat energy, analysis, and detection technology, and other aspects are with independent intellectual property rights and at the leading position in China.
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Product AdvantageThe purity of high-purity crystalline silicon is high. The purity of the product can reach more than 99.9999999% in terms of electrical properties, which meets the requirements of P-type monocrystalline, N-type monocrystalline silicon wafers, and semiconductors.
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Management AdvantageKnown as the Western Silicon Valley, Leshan has laid the foundation of management technology and talents and the post-doctoral practice base. Yongxiang has passed the evaluation of safety production standardization and is not only ranked the Level-II Safety Production Standardization Enterprise but also introduced the "Tongwei model" with pragmatic and efficient decision-making and execution. Each subsidiary has obtained the crystalline silicon carbon footprint certification of ISO 9001, ISO 14001, and ISO 45001.
Three Major Industrial Bases, Lead Industry Development
Leshan Base, Sichuan Province
At present, the 50,000-ton Leshan Phase II has been put into production. The quality indicators of the first batch of products have reached the solar special grade standard, which has reached the industry-leading level at one time. The 120,000-ton Leshan Phase III project is expected to be in production in 2023. Leshan Phase III project is Tongwei's first single project with an annual output scale of more than 100,000 tons. The lower unit investment cost, better process design, and higher level of intelligence will further consolidate Tongwei's quality and cost advantages.
Baotou Base, Inner Mongolia
The project's first phase was officially put into operation at the end of December 2018, with an annual production capacity of 30,000 tons. The 50,000-ton Phase II project is expected to be in production in 2022.
Baoshan Base, Yunnan Province
The high-purity crystalline silicon green energy project of Yunnan Tongwei Hydropower Silicon has a designed annual output of 180,000 tons of high-purity crystalline silicon. The total planned investment of the project is 20.5 billion yuan, and it is expected to be completed and put into operation in 2025.
Global Market Share
25-30%
Monthly Shipments
NO. 1 in the world
Product quality, various consumption levels and costs are
Leading the industry
Circular Economy Industry Chain, Creates A Green Future Together
Tongwei has been committed to building and improving the chemical industry and green energy industry chain and has realized a circular industry chain that features the integration of new energy and chemical industry from "halogen, caustic soda, polyvinyl chloride to calcium carbide slag cement" and "from hydrogen chloride, silicon trichloride to crystalline silicon new energy."
High-purity Crystalline Silicon
Grey metal luster, density 2.32 ~ 2.34 g/cm 3, melting point 1410 °C, boiling point 2355 °C, is the most essential and fundamental functional material of the semiconductor industry, electronic information industry, and solar photovoltaic industry.
Ion membrane caustic soda
It has excellent performance and stable quality and does not contain any harmful substances specified in the list of 10 toxic substances in the ROHS of the European Union and Chinese national standards. It is at a food-packaging class and can meet the environmental protection requirements for PVC of the European Union. It has few crystal points, good molding, and high transparency, is the first choice of raw materials for hot shrinkable membranes, and is favored by cable and wire manufacturers.
Polyvinyl Chloride (PVC)
The purity of ion membrane caustic soda is high, and the impurities are 70% lower compared to peers, and all indexes exceed the requirements of national industrial sodium hydroxide quality indicators.
Green Practice Development
Equipment electrification and
crude fuel replacement
crude fuel replacement
Expand clean power usage
Strive for 100% clean power supply as soon as possible
Strive for 100% clean power supply as soon as possible
Establish carbon
emission management system
emission management system
Successful joined the
Scientific-BasedTarget
Global Initiative (SBTI)
Scientific-BasedTarget
Global Initiative (SBTI)
Continue to pay close attention to energy conservation and consumption reduction,
maintain the leading position of unit consumption indicators in the industry
Take efforts to implement
supply chain emission reductions
supply chain emission reductions
Independence Innovating Technology, Achieving Global Leadership
In the past 20 years, through continuous technological research and development and process innovation, Yongxiang has solved safety and environmental protection issues from the source. It has formed a complete circular economy industry chain and material energy self-circulation system integrating the chemical industry and new energy and has achieved quality improvement, consumption reduction, and low-carbon development with world-leading indicators.
Owns independent IPR items
500+
The purity of key impurity elements of high-purity crystalline silicon products reaches
99.999999999%
Over 99% of the products
meet monocrystalline requirements of P-type and N-type
Reach electronic first-class quality standards over
95%
Green Energy Industry Chain
— Midstream: High-Efficiency Crystalline Silicon Cells and High-Efficiency Modules
TW Solar - Six “NO. 1”
The largest cell production capacity, the largest shipments, the most profitability, the lowest cost, the highest operating rate, and the fastest construction speed globally.
Independent innovation, improves the efficiency of optoelectronic conversion
In 2021, by improving the research and development of HJT and the mass production efficiency, TW Solar made progress in lowering the consumption index of auxiliary materials and consumables and has phased progress in research and development of silver slurry replacement. TW Solar simultaneously conducts research and development of TOPCon technology and takes the lead in starting the mass production pilot test of 210mm TOPCon. The 1GW TOPCon project has been successfully put into production, and the conversion efficiency of the mass-produced product is leading in the industry.
Leading standards, promote the standardization construction in the PV industry
TW Solar has formed several technical achievements with independent intellectual property rights in the core technical fields such as ALD back passivation, selective emitter technology, bifacial solar cell, multi-busbar (MBB), TOPCon cell, HJT cell, etc. While focusing on the mainstream PERC technology, TW Solar emphasizes the tracking and R&D of new PV technologies. Currently, the conversion efficiency of the mass-produced HJT cell and TOPCon cell is at the leading level.
Two world records, 500 patents
The high-efficiency cell and its package module independently developed by TW Solar have been tested and certified by the National Photovoltaic Product Quality Supervision and Inspection Center, breaking the world record twice. Up to now, TW Solar has obtained nearly 500 valid authorized patents.
Four bases and the Tonghe Project achieve "Tongwei speed"
Tonghe Project
Hefei Base
Shuangliu Base
Meishan Base
Jintang Base
High-efficiency products lead the high-efficiency module technology in the industry.
High-efficiency Cells
High-efficiency Modules
Six Module Product Advantages, Robust and Reliable
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Half-cell cut - reduce flow and lossCurrent density is reduced by 1/2, internal power loss is reduced to 1/4 of conventional modules, and the rated output power is increased by 5~10w. -
Shading, without lowering outputUp-down symmetrical parallel module design, effectively reduce current mismatch due to shading. As shown in the shading instance below, the power output is raised from 0 to 50%. -
Multi-busbar - reduced strings increase output, dense wires reduce lossesDensely distribute grind lines, uniform load.
Multi-busbar design, output power increased by more than 5W. -
New welding wireAdopt round wire solder ribbon, low shading area.
Multiple reflections of incident linght, power increased by 1-2W. -
Lossless laser cuttingLossless laser cutting technology, no mechanical damage, smooth cutting surface without burrs.
Low cell cracking risks, micro-cracking is reduced by more than 50%. -
High-density Packaging TechnologyThe 210 Series adopts advanced high-density packaging technology to ensure the perfect balance of efficiency and reliability,
increasing module efficiency by more than 0.15%.
Five Module System Advantages, Excellence Upgrade
Lower Operating Temperature
The outdoor temperature range of half-cell module is 2 ~ 3℃ lower than that of conventional modules, and the power output increases by more than 0.5 under the same conditions.
Better Surface Load Capacity
The overall module passed 2400Pa wind load and 5400Pa snow load tests.
Higher Conversion Efficiency
With the outstanding cell technology and leading processing techniques, the conversion efficiency of TOPCon high-efficiency modulemodule is over 22.2%.
Excellent Low-light Performance
TOPCon high-efficiency module outputs more power in low-light conditions such as cloudy, morning, and evening situations.
Superior Anti - PID Capability
Possibilities of degradation caused by PID is minimized by optimization of cell production technology and material management.
Green Energy Industry Chain
- Downstream: Fishery & PV Integration
Tongwei innovative lay out the “Fishery & PV Integration” blueprint at the downstream of the industry chain.
At the comprehensive application end of the new energy industry, Tongwei follows China's green development strategy deployment.
Organically integrate photovoltaic power generation with modern fisheries, and initiate the "PV+fishery" development model, where power generates on the top and fish swim on the bottom.
Organically integrate photovoltaic power generation with modern fisheries, and initiate the "PV+fishery" development model, where power generates on the top and fish swim on the bottom.
Investment Development
Tongwei New Energy is Tongwei's terminal investment platform for the PV industry, with "PV changes the world" as its core concept. It takes Tongwei New Energy, Tongwei New Energy (Shenzhen), and Tongwei New Energy Technology (Beijing) as the main entities and focuses on the investment and development of "Fishery & PV Integration."
Planning and Design
Land Resource Compound Utilization and Intelligent Construction Solution
Land Resource Compound Utilization and Intelligent Construction Solution
Tongwei Intelligent Aquaculture Solution (Scientific Planning, Intelligent Control) Tongwei New Energy Engineering Design Sichuan Co., Ltd. insists on taking market demand as the guide, taking technological innovation as the power source for enterprise development, focusing on R&D in the field of PV terminal technology and power station design. It is an essential participant in new energy development and innovation and provides customers with high-quality new energy system integration solutions. Its business covers all aspects of the new energy industry chain, such as power investment, project development, planning consulting, survey and design, engineering construction, etc. It is committed to providing world-class full-lifecycle solutions for clean energy.
Intelligent Operation and Maintenance
"Fishery & PV Integration" Smart Operations Specialist
"Fishery & PV Integration" Smart Operations Specialist
Sichuan Yuguang Wulian Technology Co., Ltd. focuses on PV power station operation and maintenance and profoundly explores the "PV+fishery" intelligent operation. The project layout covers more than 40 cities across China. It operates "PV+fishery" bases in Anhui, Jiangsu, Guangdong, Hubei, Inner Mongolia, and other provinces and cities across China. In the surface PV project market, based on Tongwei's "PV+fishery" market of more than 10%, large-scale "PV+fishery" operating bases have also emerged throughout China.
Contact Us
No.588, Middle Section of Tianfu Avenue, Chengdu High-tech Zone, Sichuan Province
+86 028-85188888 4008080888 8008866888
+86 028-85199999