China is the world's biggest producer and exporter of products such as solar panels, lithium batteries and electric vehicles, with its investment, innovation and manufacturing capabilities leading the world by an "astonishing margin", CEF said in a research report.

It is responsible for 32.5% of global electric vehicle exports, 24.1% of lithium batteries and 78.1% of solar panels, but its dominance has sparked concerns it is using its giant capacity surpluses to flood markets, drive down prices and undermine competitors.

The United States and Canada have already slapped 100% tariffs on China-made electric vehicles, and the European Union is set to vote on the issue this week. U.S. imports of Chinese solar panels and lithium batteries are also subject to tariffs of 50% and 25%, respectively.

"The investments from Chinese private companies are largely driven by the need to circumvent trade barriers," said Xuyang Dong, CEF analyst and co-author of the report.

She said BYD (002594.SZ), China's leading electric vehicle manufacturer, is now building a $1 billion plant in Turkey to avoid a proposed EU tariff of nearly 40%, and battery maker CATL (300750.SZ) is planning factories in Germany, Hungary and elsewhere.

BYD and CATL did not immediately respond to emailed requests for comment on a Chinese national holiday.

According to a separate study published by Britain's Grantham Institute this year, two thirds of China's cleantech capacity would be "surplus to domestic requirements" and looking for export markets by 2030, with total solar production capacity set to reach 860 gigawatts.

China has bristled at the tariff increases, saying restrictions on cheap Chinese imports will hamper efforts to combat climate change.

Senior Chinese climate envoy Liu Zhenmin warned in March that "decoupling" from Chinese manufacturing could raise the global energy transition bill by 20%.