The US slapped new import duties on solar panels and other related products from China after the Commerce department ruled they were produced using Chinese government subsidies, potentially inflaming trade tensions between the two countries.

The US arm of German solar manufacturer SolarWorld AG filed a petition complaining that Chinese manufacturers are sidestepping duties imposed in 2012 by shifting production of the cells used to make their panels to Taiwan and continuing to flood the US market with cheap products.

The new complaint seeks to close that loophole by extending import duties to also cover panels made with parts from Taiwan.

In a preliminary determination, the Commerce department imposed duties of 35.21 per cent on imports of panels and other products made by Wuxi Suntech Power and five other affiliated companies, 18.56 per cent on imports of Trina Solar and 26.89 per cent on imports from other Chinese producers.

A preliminary decision on the anti-dumping section of the complaint is due by July 25. That section covers panels assembled in China from Taiwanese inputs or third-country cells made from Chinese inputs. The anti-subsidy duties will hurt the Chinese solar industry, although the overall impact should be limited given the US accounted for just about 10 per cent of Chinese solar shipments last year, industry officials and analysts say.

“The import duties, which are in line with our expectations, will wipe out the price competitiveness of Chinese products in the US market,” said Zhou Ziguang, analyst at Chinese investment bank Ping An Securities in Beijing.

The Chinese government, which has been scrambling to boost domestic demand to offset declines in orders from Europe – previously the dominant buyer of Chinese solar products – yesterday expressed its “strong dissatisfaction” with the US decision.

In a notice posted on its website, China’s Ministry of Commerce said the US had “ignored the facts” and abused trade rules in order to protect its own industry, adding that the use of trade measures “would not solve the development problems of the US solar industry.”

The Solar Energy Industries Association said SolarWorld and Chinese manufacturers should try to settle the dispute before the industry was hurt. But SolarWorld said it is not fair that Chinese solar producers benefit from government aid from their own country, including discounted loans and free utilities, making it hard for US firms to compete.

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