A final determination has been made on the Solar IV cases for imports from Laos, Indonesia, and India  —here's what developers, sponsors, equipment purchasers, and financing parties need to know now.

On August 6, 2026, President Trump signed a presidential proclamation (link) imposing tariffs and minimum prices on imported polysilicon and its derivatives—including silicon wafers, solar cells, solar modules, and semiconductors—under Section 232 of the Trade Expansion Act of 1962. The action follows a Section 232 investigation initiated by the U.S. Department of Commerce on July 1, 2025, which examined U.S. dependence on foreign sources of polysilicon and the national security implications of concentrated overseas supply chains.