Tongwei Co., Ltd.

Tongwei Co., Ltd. is a China-based polysilicon and solar photovoltaic manufacturing giant headquartered in Chengdu, Sichuan Province. Founded in 1992, the company achieved 84.128 billion CNY in 2025 revenue, operates mega-scale production facilities across Sichuan, Inner Mongolia, and Yunnan, employs 55,724 people, and commands 85 GW of annual solar module manufacturing capacity.

Core Business

Tongwei is the world's largest producer of high-purity polysilicon, the fundamental raw material for solar photovoltaic cells. The company's manufacturing operations span the entire solar value chain: polysilicon refining using the modified Siemens process and fluidized bed reactor (FBR) technology, monocrystalline silicon ingot pulling and wafer slicing, high-efficiency solar cell fabrication (including TOPCon and HJT technologies), and solar module assembly. In 2025, Tongwei's module capacity reached 85 GW, making it one of the top four global solar module manufacturers by production volume.

Beyond pure solar manufacturing, Tongwei has pioneered the ""fishery-solar hybrid"" agrivoltaic model, integrating photovoltaic power generation with aquaculture operations. This innovative approach enables dual land use—solar panels installed above fish ponds generate electricity while the water body below continues aquaculture production. The company also operates a significant animal feed and agribusiness division, providing portfolio diversification beyond the highly cyclical solar materials market. Despite severe industry headwinds in 2025, Tongwei maintained 2.207 billion CNY in R&D expenditure focused on advancing N-type cell conversion efficiency.

Global Presence

Tongwei's manufacturing operations are concentrated in China's low-cost energy regions—Sichuan (hydropower), Inner Mongolia (coal-based power), and Yunnan (hydropower)—providing structural electricity cost advantages. The company's products are exported to dozens of countries globally, with a particularly strong presence in Asia-Pacific, Middle Eastern, and Latin American solar markets. Tongwei's polysilicon output directly influences global solar panel pricing, given its dominant market share in the upstream raw material segment.

Key Strengths

Tongwei's 85 GW annual module capacity and dominant polysilicon market position create unmatched economies of scale in the solar manufacturing industry. The company's mega-factories located in low-cost energy regions provide a structural cost advantage that competitors cannot easily replicate. Deep vertical integration from polysilicon to modules captures margin across the entire solar value chain. The agrivoltaic fishery-solar model represents genuine innovation in dual land use. Despite severe industry losses, maintaining 2.207 billion CNY in R&D spending demonstrates commitment to technological leadership through the cycle.

VerityRank Score of 88/100