U.S.-based SEG Solar has announced plans to set up a 4.6 GW solar module manufacturing facility in the Greater Houston area of Texas, its third such production site in the country.

The new facility, spanning 1.15 million square feet, is expected to increase SEG Solar’s planned annual solar module manufacturing capacity to 10.6 GW. This facility will also include a factory and a warehouse.

SEG said the new facility will support its transition to next-generation heterojunction (HJT) solar cell technology. The facility is also being designed to support the production of Foreign Entity of Concern-compliant modules through supply chain traceability, material control, and compliance management.

The company said the facility is expected to be completed by March 2027, with commercial operations beginning by May 2027. SEG Solar will commission its second U.S. facility with a capacity of 4 GW on August 7, 2026. The facility will involve an investment of over $200 million.

Last December, SEG Solar commenced the build-out of a 5 GW ingot-and-wafer manufacturing facility in Indonesia. The company said construction of that facility is expected to begin in the second quarter of 2026. The facility will be expanded to enable the manufacture of 5 GW of ingots and wafers.

It is evaluating potential U.S. sites for a dedicated HJT cell manufacturing facility.

The company serves utility, commercial, and residential solar markets. It has shipped more than 7.5 GW of solar modules globally by the end of 2025, reaching 6.5 GW of module production capacity during the year. It also has a solar cell production capacity of 5 GW.

In 2023, SEG Solar announced the acquisition of a manufacturing facility in Texas capable of producing over 2 GW of solar modules.

Domestic module manufacturing capacity in the U.S. expanded by more than 50%, reaching 65.5 GW by the end of 2025, up from 42.5 GW at the end of 2024. Cell manufacturing capacity also continued to grow, while wafer capacity came online in the U.S. for the first time since 2016. However, actual output from domestic facilities remained well below total domestic demand.