SEG Solar's Second Module Factory Passes Intertek ETL Factory Audit, Cleared for North American Market

HOUSTON, Sept. 29, 2026 -- SEG Solar (“SEG”), a leading U.S. solar module manufacturer, announced that its Tomball #1 module plant in the Greater Houston area of Texas has successfully completed Intertek’s factory audit and received an ETL Authorization to Mark, clearing the company to apply the ETL Mark to modules produced at the facility for sale in the United States and Canada. The plant has an annual capacity of 4 gigawatts (GW), including a 1 GW back-contact (BC) line, giving it production capability in both heterojunction (HJT) and BC technologies. Its first module rolled off the line on Sept. 16.

Intertek is a global leader in quality and safety assurance, and the ETL Mark is among the most widely recognized product safety certifications in North America. ETL certification extends beyond sample testing: producing facilities must accept regular inspections that verify production units remain identical to the units tested. Passing the inspection confirms that the plant’s quality control system and process capabilities meet certification requirements.  

The inspection was conducted against the latest editions of UL 61215 and UL 61730, covering incoming inspection of raw materials and components, in-process quality control, process flow and equipment management, finished-goods testing and after-sales traceability. SEG’s HJT and BC production lines were certified. The plant is equipped with AI-enabled inspection and MES 2.0 and ERP 2.0 digital manufacturing systems, making production data traceable across the full process. SEG’s first U.S. facility, a 2 GW module plant in Houston, previously passed the same Intertek inspection. Tomball #1 is the second SEG plant in the United States to receive ETL authorization. 

“Passing the factory inspection reflects the control SEG applies to new production lines, product quality and safety in the U.S. market,” said Jim Wood, chief executive officer of SEG Solar. “SEG will continue to support local supply with a complete certification framework and advanced manufacturing capability, delivering efficient and reliable modules to North American customers.”

About SEG Solar

Founded in 2021, SEG is a leading vertically integrated PV manufacturer headquartered in Houston, Texas, U.S., and is dedicated to delivering reliable and cost-effective solar modules to the utility, commercial, and residential markets. By the end of 2025, SEG had shipped over 7.5 GW of solar modules worldwide and reached a module production capacity of 6.5 GW.