U.S.-headquartered manufacturer of glass for industrial and scientific applications, Corning, has operationalized a solar ingot and wafer facility, co-located with its polysilicon manufacturing plant in Hemlock, Michigan.

Corning brought the facility on stream in the third quarter (Q3) of 2025. During its Q3 earnings call, the company said it activated its idle assets to meet domestic polysilicon demand. “We added the capability to transform our polysilicon into higher-value, domestically made solar wafers, all integrated together on our campus in Michigan,” said Wendell Weeks, CEO at Corning.

Weeks stated that Corning had sold out its polysilicon and wafer capacity in 2025, and more than 80% of its committed for the next five years. “In this quarter, we expect to move from producing thousands of wafers a day to more than 1 million a day.”

The company said it plans to build its solar business into a $2.5 billion revenue stream by 2028. Sales in the segment rose 46% year-over-year, primarily driven by additional polysilicon capacity coming online and the ramp of Corning’s module operations.

According to the Solar Energy Industries Association (SEIA), the entire solar supply chain has been reshored and U.S. manufacturing capacity has grown across every segment of the solar and storage supply chain. “With the news of Hemlock’s new ingot and wafer facility coming online in Q3, the United States now has the capacity to produce every major component of the solar supply chain.”

Earlier this year, Corning partnered with crystalline silicon solar cell manufacturer Suniva and module producer Heliene to establish the first fully U.S.-made solar module supply chain.

A SEIA report in February said U.S. companies had announced plans to manufacture 24 GW of wafers, 13 GW of ingots, and 56 GW of solar cells.

The U.S. government has included domestic content cost percentages for projects that deploy solar modules manufactured with wafers produced domestically.