China Sunergy
A former Chinese manufacturer of silicon solar cells and photovoltaic modules.
Last updated October 12, 2026
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Overview
China Sunergy, also known as CSUN, was a Chinese photovoltaic manufacturer headquartered in Nanjing, Jiangsu. Its business focused on converting silicon wafers into solar cells and assembling photovoltaic modules for utility, commercial, and distributed-generation applications. The company served a substantial domestic customer base while also selling products internationally through a broad distributor and wholesaler network. The company produced both monocrystalline and multicrystalline silicon solar cells. Its manufacturing expansion reflected the rapid growth of the global photovoltaic industry during the 2000s and early 2010s, when Chinese manufacturers increased capacity and competed on scale, cost, and efficiency. China Sunergy became a Nasdaq-listed company in 2007, giving it access to international capital markets and greater visibility among global solar-industry customers and investors. By 2012, the company reported annual cell production capacity of approximately 1 GW and photovoltaic-module production capacity of approximately 1.2 GW. It later pursued an international manufacturing strategy, opening its first overseas manufacturing base in Turkey on May 23, 2013. The Turkish operation was located in the Tuzla Free Trade Zone in Istanbul and was described as having the largest solar-cell and module capacity in Turkey and Europe at that time. The company also planned a second Turkish factory during the following expansion period. China Sunergy’s international reach included sales through more than 79 distributors and wholesalers in over 26 countries. In March 2014, it was recognized as a Tier 1 module supplier in Bloomberg New Energy Finance’s PV Module Maker Tiering System, an industry classification associated with bankability and market standing rather than a formal product certification. The company ultimately became a defunct business. Existing dossier material identifies delisting and bankruptcy proceedings in 2018, following intense photovoltaic-industry competition and financial difficulties. Because the available reference material does not provide a detailed account of the restructuring, legal proceedings, or final corporate disposition, those later events require additional verification.
History
China Sunergy developed as a Chinese photovoltaic manufacturer specializing in solar cells made from silicon wafers and in the production of photovoltaic modules. Its base in Nanjing, Jiangsu, placed it within one of China’s major manufacturing regions, while its product range covered both monocrystalline and multicrystalline silicon technologies. The company’s manufacturing activity expanded during the rapid international growth of solar power in the 2000s. On May 17, 2007, China Sunergy began producing both monocrystalline and multicrystalline silicon solar cells. That same year it became a Nasdaq-listed company. The listing gave the business an international public-market profile at a time when solar manufacturers were seeking capital to expand wafer, cell, and module capacity. China Sunergy maintained a significant customer base in China but also developed an export-oriented sales network. Its distribution system was described as covering more than 79 distributors and wholesalers across more than 26 countries. This model allowed the company to reach international solar markets without relying solely on directly operated sales channels. The company reported substantial manufacturing capacity by 2012. Annual solar-cell production was reported at approximately 1 GW, while photovoltaic-module production reached approximately 1.2 GW. These figures indicate that the company had moved beyond a small specialist operation and was competing as a scaled manufacturer in a market increasingly shaped by manufacturing efficiency, technology improvements, financing conditions, and international trade policy. China Sunergy subsequently pursued overseas manufacturing. On May 23, 2013, it opened its first international manufacturing base in Turkey. The facility was located in Istanbul’s Tuzla Free Trade Zone and was described in the available reference material as having the largest solar-cell and module capacity among facilities in Turkey and Europe at that time. The company was also reported to be developing a second Turkish factory during the 2015 planning period. This expansion was strategically significant because it gave China Sunergy a production presence closer to European customers and helped distinguish it from manufacturers operating only in China. Market recognition followed the Turkish expansion. On March 23, 2014, Bloomberg New Energy Finance’s PV Module Maker Tiering System recognized China Sunergy as a Tier 1 module supplier. The designation was relevant to the company’s commercial positioning because module-bankability assessments can influence the willingness of project developers, lenders, and distributors to use a manufacturer’s products. It did not, by itself, constitute a government certification or guarantee of corporate financial health. The photovoltaic industry later experienced intense competition, pricing pressure, capacity imbalances, and financial stress among manufacturers. Existing dossier material states that China Sunergy was delisted and went bankrupt in 2018. The supplied references do not establish the precise bankruptcy jurisdiction, restructuring timeline, creditor outcome, or the fate of each manufacturing operation. China Sunergy should therefore be treated as a defunct photovoltaic brand, while its final legal and operational history remains incompletely documented in this entry.
- 2018
Reported delisting and bankruptcy
Existing dossier material reports that the company was delisted and went bankrupt after financial difficulties and strong industry competition.
- 2014
Receives Tier 1 module-supplier recognition
[1]Bloomberg New Energy Finance recognized China Sunergy as a Tier 1 supplier in its PV Module Maker Tiering System.
- 2013
Opens first international manufacturing base
[1]The company opened a manufacturing base in Istanbul’s Tuzla Free Trade Zone on May 23, extending its production footprint into Turkey and Europe.
- 2012
Reaches gigawatt-scale production
[1]Reported annual production reached approximately 1 GW for solar cells and 1.2 GW for photovoltaic modules.
- 2007
Begins production of two silicon-cell technologies
[1]On May 17, China Sunergy began producing both monocrystalline and multicrystalline silicon solar cells.
- 2007
Nasdaq listing
[1]China Sunergy became a Nasdaq-listed company, establishing an international public-market presence.
Products and positioning
A vertically oriented photovoltaic manufacturer positioned around silicon solar-cell production, module manufacturing, capacity scale, and international distribution.
Solar cells · 2007
Monocrystalline silicon solar cells
Photovoltaic cells manufactured from monocrystalline silicon wafers. China Sunergy began producing monocrystalline cells in 2007 as part of a broader cell portfolio intended for higher-efficiency photovoltaic applications.
Solar cells · 2007
Multicrystalline silicon solar cells
Photovoltaic cells made from multicrystalline silicon wafers. These cells formed the second major technology in China Sunergy’s production range and supported the company’s scale-oriented module business.
Solar modules
Photovoltaic modules
Assembled solar panels using the company’s silicon-cell products. China Sunergy manufactured photovoltaic modules for domestic and international markets and reported module production capacity of approximately 1.2 GW in 2012.
Controversies
Brand decisions
2018
Exit from public-market operations and bankruptcyOtherBackground
The company faced financial difficulties amid intense competition in the photovoltaic-manufacturing industry.
Action taken
Existing dossier material reports that China Sunergy was delisted and went bankrupt.
Aftermath
The brand is treated as defunct. The specific legal process, jurisdictions, and disposition of assets require additional verification.
2013
International manufacturing expansion into TurkeyStrategyBackground
China Sunergy had a domestic customer base but also sold internationally through distributors and wholesalers. Establishing production outside China supported its international growth strategy.
Action taken
The company opened its first international manufacturing base in Istanbul’s Tuzla Free Trade Zone and planned a second Turkish factory during the subsequent expansion period.
Aftermath
The Turkish operation gave China Sunergy a manufacturing presence in Europe and was described as having the largest solar-cell and module capacity in Turkey and Europe at the time. The available material does not document the eventual operating status of the planned second factory.
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