A version of this article originally appeared on Climate Progress.

In a long-awaited decision, the U.S. Department of Commerce has issued a preliminary decision to apply tariffs to Chinese-made solar modules being imported into the U.S. The tariffs range from 31 percent to 250 percent.

The preliminary tariffs were issued after a lengthy investigation by the Commerce Department into whether Chinese companies are “dumping” solar panels into the U.S. market below cost. These tariffs follow a March decision to issue small countervailing duties on Chinese module producers that are getting illegal domestic subsidies, according to the Commerce Department.