SEG Solar Inaugurates 4-GW Solar Panel Factory in Tomball, Texas
Key Takeaways
- •SEG Solar's new Tomball, Texas facility represents a $200 million investment with an annual production capacity of 4 GW across more than 500,000 square feet.
- •The plant is among the largest heterojunction module manufacturing sites in the U.S., equipped with four production lines dedicated to SEG's SIERRA N series HJT modules.
- •The facility opening is part of a wave of U.S. solar manufacturing expansions enabled by federal tax credits revived under the Inflation Reduction Act.
- •SEG Solar is already constructing a third module assembly plant and is evaluating a silicon cell manufacturing facility to reduce reliance on imported cells from Southeast Asia.
- •Commercial operations at the Tomball facility are slated to commence in the third quarter of this year, driven in part by rising electricity demand from AI and data center growth.
SEG Solar has inaugurated its second U.S. solar panel assembly facility, a 4-GW annual capacity plant located in Tomball, Texas, just outside Houston. The company already operates a 2-GW panel manufacturing facility nearby in Houston and is currently constructing a third factory in the same region.
The Tomball facility, representing a $200 million investment, spans more than 500,000 square feet and ranks among the largest heterojunction (HJT) module manufacturing sites in the United States. HJT technology, which combines crystalline silicon with thin-film layers, has gained traction among manufacturers pursuing higher efficiency and lower temperature coefficients compared to conventional PERC designs. The plant is equipped with four advanced production lines dedicated to SEG's latest-generation high-efficiency SIERRA N series HJT modules, supporting both 210-mm and 210R wafer formats. It incorporates specialized HJT manufacturing processes, including low-temperature soldering and precision butyl sealant application.
The opening adds to a wave of U.S. solar manufacturing expansions following federal incentives under the Inflation Reduction Act, which revived domestic production tax credits for solar components. Texas, already the leading state for installed solar capacity, has attracted a growing cluster of module assembly plants leveraging its logistics infrastructure and proximity to large renewable energy markets.
"Seeing another SEG manufacturing facility stand on American soil is a proud moment for all of us," said Jun Zhuge, founder and COO of SEG Solar. "The rapid growth of artificial intelligence and data centers is driving unprecedented demand for reliable electricity and accelerating the need for new energy infrastructure. Tomball 1 is an important step in expanding our manufacturing capacity to meet that demand, with commercial operations expected to begin in the third quarter of this year."
While construction continues on its third module assembly facility, SEG also announced that it is evaluating the development of a silicon cell manufacturing plant as part of broader efforts to establish a more integrated domestic supply chain. Most U.S. module assemblers currently depend on imported cells, predominantly from Southeast Asia, making upstream cell production a critical bottleneck for full domestic supply chain integration.