WASHINGTON—U.S. President Donald Trump on Saturday signed a proclamation to revoke an exclusion from tariffs on some imported double-sided solar panels—mostly from China—and for raising the planned tariff rate to 18 percent for 2021 from 15 percent.
Trump said the domestic U.S. industry was starting to increase production and market share of certain solar modules after he imposed tariffs on imports in January 2018, but further steps were needed.
