Solar Power World
By Kelly Pickerel | June 1, 2026
SEG Solar just announced plans for a third solar panel assembly facility sited in Texas. This new 4.6-GW facility will bring the company’s total U.S. module manufacturing capacity to 10.6 GW annually.
SEG currently operates a 2-GW facility in Houston and is opening a 4-GW facility in Tomball this August. The third facility is a brand-new build and will span 1.15 million ft², including the assembly factory and a warehouse. The third site, which appears to be adjacent to the second factory in Tomball, is expected to finish construction in March 2027 with commercial panel production planned to begin in May 2027.
SEG said the new facility will produce heterojunction technology (HJT) modules, which would quickly boost the number of n-type solar panels made in America, as TOPCon patent battles continue to work their way through the courts and stall American production.
SEG is developing a 5-GW ingot and wafer manufacturing facility in Indonesia, with construction expected to begin this quarter. The company already has a cell manufacturing plant in Indonesia.
SEG reps said the company is also evaluating U.S. sites for a dedicated HJT cell manufacturing facility.
Kelly Pickerel has more than 15 years of experience reporting on the U.S. solar industry and is currently editor in chief of Solar Power World. Email Kelly.

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