The company said it plans to have 10.6 GW of operational module assembly capacity by 2027, with a future HJT cell facility also planned for the U.S.

SEG Solar has opened its newest facility, a 4 GW solar module assembly plant in Tomball, Texas. Once the plant is fully operational next year, it will bring SEG’s annual module assembly capacity to 6 GW, joining the company’s original 2 GW facility in nearby Houston.

As part of the grand opening ceremonies, SEG also announced plans to build an additional 4.6 GW module assembly factory within 18 months. The new facility would be located across the street from the new Tomball plant and bring the company’s total annual capacity to 10.6 GW, making it the largest crystalline silicon solar module assembler in the United States.

In addition to the new module capacity, the company said it plans to build a solar cell manufacturing plant in the U.S. by 2028.

The announcement of plans for cell capacity came on an auspicious day — less than 24 hours prior to the grand opening ceremony, the Trump administration unveiled a plan to implement a price floor and additional tariffs levied on all imported solar cells and modules under Section 232 of the Trade Expansion Act of 1962.