The Office of the United States Trade Representative (USTR) has initiated a Section 301 investigation into structural excess capacity and production in manufacturing, with India among the economies under review.

The investigation will examine whether policies or practices in these economies are contributing to structural overcapacity in manufacturing sectors that could distort global markets and harm U.S. commerce.

An illustrative list of sectors plagued by excess capacity and production includes solar modules, batteries, energy goods, and semiconductors. In many of these sectors, the U.S. has lost substantial domestic production capacity or has fallen worryingly behind foreign competitors, the USTR notice said.

Along with India, the probe also covers China, the European Union, Singapore, Switzerland, Norway, Indonesia, Malaysia, Cambodia, Thailand, South Korea, Vietnam, Taiwan, Bangladesh, Mexico, and Japan.

According to USTR, structural excess capacity occurs when government policies or industrial support mechanisms enable manufacturers to produce more goods than domestic markets can absorb, leading to increased exports that can depress global prices and affect competing industries.

The investigation has been self-initiated under Section 301 of the Trade Act of 1974, a U.S. trade law used to address foreign practices considered unreasonable or discriminatory toward U.S. commerce.

As part of the investigation process, USTR will seek consultations with the economies under review and open a public comment period starting March 17, 2026. Stakeholders can submit comments and request to testify at a hearing scheduled for May 5, 2026.

The move comes amid heightened scrutiny of global clean energy supply chains and manufacturing support policies. The U.S. has increasingly taken steps to protect domestic manufacturing capacity and reduce reliance on imports as part of a broader industrial strategy.  The U.S. has already imposed tariffs on Chinese clean energy components, including solar wafers and polysilicon, under Section 301.

U.S. trade actions targeting solar imports have intensified in recent years, affecting both India and other major exporting regions.

The development could also add uncertainty for Indian exporters exploring opportunities in the U.S. market.

After the U.S. slashed tariffs on Indian goods from an effective rate of 50% to 18% in February, industry observers cautioned that the U.S. reshoring push could limit gains for Indian solar exporters, as Washington continues to prioritize domestic manufacturing and supply chain security.

Raj Prabhu, CEO at Mercom Capital Group, had commented at that time that U.S. policy goals are very similar to India’s, which is to build a domestic solar manufacturing supply chain. “As U.S. domestic cell and module capacity ramps up, the need for imports will decline. There may be a short-term opportunity for Indian manufacturers, but adding capacity solely to export to the U.S. would not be a sound long-term strategy.”

India’s solar trade flows have already begun to shift. Recent reports showed that India’s solar exports fell significantly in the latest quarter, although the U.S. remained a key destination for modules and cells despite tariffs and trade barriers.

Section 301 investigations can ultimately lead to trade measures, such as tariffs or other restrictions, although the current announcement marks the beginning of the investigation rather than the imposition of penalties.