The SEG Solar Tomball Texas facility officially opened on August 7, 2026, marking a 4 GW solar module assembly plant that pushes the company toward becoming the largest crystalline silicon module manufacturer in the United States. Located in Tomball, just outside Houston, the plant joins SEG’s original 2 GW facility to lift the company’s annual domestic module assembly capacity to roughly 6 GW once fully operational next year. SEG Solar, founded in 2021 and led by CEO Jim Wood and founder and COO Jun Zhuge, represents an investment exceeding $200 million and spans nearly 500,000 square feet, or about 46,400 square metres, of manufacturing space. The facility runs three front end production lines, eight lamination machines and four output lines, and at full capacity it is expected to employ 500 workers producing as many as 30,000 modules a day.

Commercial operations were slated to begin in the third quarter of 2026, with pilot calibration starting in the weeks following the grand opening and 100 workers, trained at the Houston plant, running the lines first. The Tomball opening was delivered through a straightforward corporate build out rather than a traditional public procurement process, with SEG financing and constructing the plant itself as part of a broader localization strategy. At the ceremony, SEG also unveiled plans for a second Tomball facility, a further 4.6 GW expansion to be built within 18 months directly across the street, which would push the company’s total annual capacity to 10.6 GW and make it the largest crystalline silicon module assembler in the country.

Texas Solar Manufacturing Momentum Builds Around Houston

Texas has become the epicenter of a wider wave of American solar manufacturing investment, and the Tomball plant lands squarely within that boom. The state already ranks among the nation’s top producers of both solar modules and utility scale generation, a dynamic reflected on the project side by developments such as Vesper Energy’s 600 MW Hornet Solar project in Swisher County, which brought more than a million solar panels online and generated significant local tax revenue. Where Hornet Solar represents Texas’s strength on the generation side, SEG’s expanding Houston area footprint reflects the manufacturing side of the same story, supplying the panels that plants like Hornet ultimately install.

SEG’s planned move into cell manufacturing by 2028, alongside its existing module assembly lines, would further deepen that Texas based supply chain and reduce reliance on imported components. The company is also developing a 5 GW ingot and wafer facility in Indonesia, aiming for a vertically integrated pipeline spanning ingots, wafers, cells and finished modules. Together, these moves position Texas not just as a magnet for large scale solar generation but increasingly as a hub for the equipment that powers it, a shift that mirrors how other manufacturing heavy states have used policy tailwinds to anchor entire supply chains domestically rather than importing finished panels.

SEG Solar Tomball Facility Timeline and What Comes Next

With the Tomball plant now open, SEG’s near term focus shifts to pilot calibration and staffing up to its planned 500 workers before scaling toward full commercial output. The next major milestone is the proposed second Tomball facility, expected to add 4.6 GW of capacity within 18 months and bring the company’s stateside total to 10.6 GW by 2027, alongside a separately planned HJT cell manufacturing plant targeted for 2028. That expansion timeline carries real uncertainty, since it arrives just a day after the Trump administration announced Section 232 tariffs and a minimum import price on polysilicon, ingots, wafers, cells and modules, a policy shift SEG executives acknowledged would require careful strategic navigation. How the company responds to those trade measures, and whether financing for the second Tomball line and the future cell plant materializes on schedule, will shape whether SEG reaches its stated 10.6 GW target on time.

Project Fact Sheet

• Project Name: SEG Solar Tomball Texas Facility
• Location: Tomball, Texas, United States
• Project Value: More than $200 million, per SEG Solar’s investment disclosure
• Client/Owner: SEG Solar
• Key Components: 4 GW module assembly plant with three front end production lines, eight lamination machines and four output lines
• Procurement Model: Company financed corporate build out
• Construction Start: Not publicly disclosed
• Expected Completion: Opened August 7, 2026, with full commercial operations targeted for 2027
• Jobs Created: Up to 500 workers at full capacity
• Strategic Impact: Positions SEG Solar to reach 10.6 GW of U.S. module assembly capacity by 2027 and become the nation’s largest crystalline silicon module maker

Project Team

• Client/Owner: SEG Solar
• Company Leadership: CEO Jim Wood and founder and COO Jun Zhuge

Frequently Asked Questions

How much does the SEG Solar Tomball Texas facility cost? The SEG Solar Tomball Texas facility represents an investment of more than $200 million, according to the company.

Who built the SEG Solar Tomball Texas facility? SEG Solar developed and financed the Tomball facility itself as part of its U.S. manufacturing expansion, rather than through a separate awarded contractor.

When did the SEG Solar Tomball Texas facility open? The SEG Solar Tomball Texas facility held its grand opening on August 7, 2026, with full commercial operations expected in 2027.

How much capacity does the SEG Solar Tomball Texas facility add? The facility adds 4 GW of annual module assembly capacity, bringing SEG Solar’s total U.S. capacity to about 6 GW, with a further 4.6 GW planned to follow within 18 months.

How many jobs will the SEG Solar Tomball Texas facility create? The plant is expected to employ up to 500 workers once it reaches full production capacity.