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Since entering the photovoltaic (PV) market in 2006, Tongwei has grown into a fully integrated PV enterprise, covering the entire PV industry chain, including high-purity polysilicon and wafers, high-efficiency solar cells and PV modules, and PV power plant. . Since entering the photovoltaic (PV) market in 2006, Tongwei has grown into a fully integrated PV enterprise, covering the entire PV industry chain, including high-purity polysilicon and wafers, high-efficiency solar cells and PV modules, and PV power plant. . Tongwei entered the photovoltaic energy business in 2006. After more than a decade of accelerated development, it has become a leading company in photovoltaics, with upstream production of pure polycrystalline silicon, downstream production of high-efficiency solar cells and modules, and the. . Top Solar Panel Manufacturers in China (2026) ranked by module shipments Q1 2025 1. LONGi Green Energy Technology Co. Shunfeng. . Tongwei Solar, located in Chengdu, Sichuan Province in southwestern China, is a wholly-owned subsidiary of Tongwei Co. They have advanced production facilities and adhere to strict quality control standards, ensuring reliable and durable panels. They originated in wafer manufacturing, progressing to include solar. . Founded in 1982, the Tongwei group entered the photovoltaic industry in 2006. TW SOLAR has positioned itself as one of the major players in the industry and is listed among the "Tier 1" module manufacturers by Bloomberg.