The European Union imposed tariffs as high as 42.1 percent on solar glass from China to curb import competition for EU producers, heightening trade tensions over renewable energy.  

The duties punish Chinese exporters such as Zhejiang Jiafu Glass Co. and Xinyi PV Products (Anhui) Holdings Ltd. for allegedly selling solar glass in the EU below cost, a practice known as dumping. The glass is used for the production of solar panels, which are themselves the focus of two European trade probes affecting China.