SEG Solar has opened a new solar panel assembly plant in Tomball, Texas, marking a significant expansion of the company's domestic manufacturing footprint as it pursues an ambitious capacity buildout through the end of the decade.

New Facility Details

The Tomball plant, located outside Houston, covers more than 500,000 square feet and carries an annual module assembly capacity of 4 GW. SEG Solar described the investment as totaling $200 million. The inauguration of the site last week makes it the company's second operational U.S. assembly facility, alongside an existing 2-GW plant elsewhere in the Houston area.

Broader Expansion Push

SEG Solar is not stopping with the Tomball opening. The company is already constructing a third factory in the greater Houston region, signaling a concentrated geographic bet on Texas as a hub for domestic solar manufacturing. Looking further ahead, SEG Solar has stated a target of 10.6 GW of operational module assembly capacity in the United States by 2027. The company has also announced plans for a future heterojunction technology, or HJT, cell manufacturing facility on U.S. soil, which would move the company upstream from assembly into cell production.

National Ambitions

With the Tomball facility online, SEG Solar has positioned itself as a leading contender in the domestic crystalline silicon module market, with the company publicly stating its intention to become the largest crystalline silicon module manufacturer in the country. The combination of its existing Houston plant, the newly opened Tomball facility, and the third factory currently under construction forms the operational foundation for that goal. Reaching the 10.6 GW target by 2027 would require continued execution across all planned sites, including the prospective HJT cell plant, details of which have not yet been fully disclosed in available reporting.

Context

The announcements come as U.S. solar manufacturers face both opportunity and uncertainty, with domestic content incentives under federal clean energy policy driving demand for American-made modules. SEG Solar's Texas-centric manufacturing strategy reflects a broader industry pattern of concentrating new capacity in states with available land, workforce, and logistical infrastructure. The scale of the Tomball plant alone — equivalent to 4 GW per year — underscores how rapidly utility-scale module production capacity is being added within U.S. borders by both domestic and internationally affiliated manufacturers.