Overview
- President Donald Trump signed a decree on Thursday establishing a 15% tariff and minimum import prices on polysilicon and related products that take effect December 4, 2026.
- The hybrid policy pairs a 15% tariff with set minimum import prices that apply to polysilicon, ingots and wafers, solar cells, and modules, with published floor prices for each covered product.
- U.S. officials say the rule aims to protect domestic plants such as Hemlock Semiconductor in Michigan and Wacker Chemie in Tennessee and to curb China’s outsized share of global polysilicon output.
- Polysilicon is the ultra-pure silicon used to make solar wafers and, at higher purity, semiconductor wafers, and consultancies report China accounts for roughly 80–90% of world production.
- The move may raise costs for imported solar components and steer new investment into U.S. production, while critics point to a tension between protecting supply chains and the administration’s cuts to federal renewable demand support.