# U.S. Imposes Solar Import Tariffs

A Section 232 proclamation signed August 6, 2026, sets a 15% tariff on covered downstream silicon products and minimum import prices for polysilicon, ingots, wafers, cells, and modules, with the measures taking effect **December 4, 2026**. A separate executive order signed August 26 restricts certain foreign-produced bulk-power equipment. Together, the actions could affect sourcing costs and investment decisions for solar and storage projects and manufacturers.

- Importers and project developers should review whether their products are covered, assess the applicable minimum-price evidence, and examine contract terms agreed before August 6.
- The measures may shift procurement and investment toward U.S.-based solar and storage manufacturing, affecting supplier selection and project cost assumptions.
- Manufacturers and contractors should account for the December 4 effective date when planning imports and evaluating sourcing options.

**Jurisdictions:** federal
**Industries:** Energy & Utilities
**Topics:** Regulatory Compliance, Policy
**Published:** October 04, 2026

### Government Entities
- U.S. Department of Commerce (Commerce)
- U.S. Department of Energy (DOE)
- The White House
- U.S. Congress

### Vendors
- Corning Inc. ()
- Shin-Etsu Handotai ()
- Wacker Chemie ()
- First Solar ()
- SEG Solar ()

### Sources
- [Trump's Section 232 proclamation sets a 15% tariff and price floors on solar polysilicon imports](https://gcn.com/trump-section-232-proclamation-sets-tariff/22168) - gcn.com