Solmar Insights
Japanese solar manufacturer Toyo Co. Ltd. has finalized a $357 million expansion of its solar module manufacturing facility in Humble, Texas, more than doubling its nameplate capacity to 2 GW. The milestone, announced on October 7, 2026, positions the site among the highest-capacity module plants in the United States as Toyo sets its sights on a next-phase upgrade to heterojunction (HJT) cell technology.
Key figures
$357 million investment
2 GW module manufacturing capacity
Humble, Texas location
Factory commissioning and capacity
The ribbon-cutting ceremony capped off Toyo’s rapid development schedule, with the upgrade first announced only four months prior in June. Company officials highlighted the doubling of module capacity at the Humble facility, now offering 2 GW of annual output for crystalline silicon solar modules targeting the U.S. and North American utility-scale, C&I, and distributed generation markets. Chairman and CEO Takahiko Onozuka credited both U.S. and Japanese partners, as well as Toyo employees and the Humble community, as essential to the expansion’s delivery.
Attendees were given tours of the improved factory floor, while technical provider Intertek CEA shared results from its quality assurance review. Paul Wormser, SVP of Intertek CEA, reported that Toyo’s upgraded facility achieved their top grading in all assessed categories, reflecting high standards in process controls and risk management.
Planned HJT cell line and next steps
Toyo’s next phase in Texas involves establishing a line for heterojunction (HJT) cell production, shifting the plant’s roadmap from module assembly to advanced cell manufacturing. HJT technology offers higher module efficiency, better thermal stability, and reduced performance degradation over time compared to conventional cells, advantages increasingly in demand in the North American solar market.
The forthcoming HJT line was announced during Toyo’s Analyst Day webcast on October 6. Company representatives confirmed that the new production line is scheduled for completion by the first quarter of 2028. This move will expand Toyo’s technical footprint in the U.S. solar supply chain, and increase locally manufactured content in its modules to help buyers hit domestic content requirements under prevailing policy frameworks.
Workforce impact and local economic ties
The $357 million expansion and future cell line are driving workforce development in the Houston region. Takeshi Koyama, Consul General of Japan in Houston, commented that Toyo’s project directly creates several hundred skilled manufacturing jobs in Texas, serving as a case study of global investment fostering local prosperity.
According to local and federal officials, the project underscores long-term Japanese investment in the United States, with both supply chain diversification and job creation as stated benefits. Rep. Christian D. Menefee, whose Texas district includes part of Houston, called such onshoring efforts critical for the U.S. job market, while Jeffrey I. Kessler, Under Secretary of Commerce for Industry and Security, praised Toyo’s decision to use only U.S. polysilicon as supporting the domestic manufacturing renaissance.
Sourcing, supply chain strategy, and policy backdrop
Toyo’s commitment to using U.S. polysilicon at the Texas site signals alignment with federal incentives and content requirements under U.S. energy policy. Manufacturing in Texas allows the company to mitigate tariff risk and logistics delays associated with imports, a significant consideration for utility and C&I buyers working with compressed project timelines or domestic content targets.
This expansion arrives amid federal moves to strengthen domestic solar supply chains, and as ERCOT’s generation queue continues to expand. Toyo’s increased module output can supply new project builds throughout the region, supporting energy transition goals and offering developers a more flexible procurement path for U.S.-made components.
Structural implications for solar buyers in ERCOT
The shift to 2 GW annual capacity at a Texas-based facility can materially impact equipment procurement strategies for developers and IPPs in the ERCOT market. Shorter supply chains, predictable lead times, and explicit use of U.S. inputs can help buyers qualify for higher incentive levels while mitigating project risk. As Toyo moves toward HJT cell production by early 2028, a pipeline of higher-efficiency modules may become available for regional power projects, enabling asset owners to boost performance and reliability in both utility-scale and distributed solar installations.
The facility’s strategic geography in Greater Houston, combined with Toyo’s pursuit of advanced cell technology, signals increased optionality for U.S.-based buyers seeking to balance cost, domestically sourced content, and technical performance in module procurement.
What this means for buyers
Solar module equipment procurement in ERCOT and the broader Texas region now includes a new 2 GW of annual capacity delivered from Toyo’s Humble facility. The $357 million expansion, with an upcoming HJT cell line, allows buyers to source higher-efficiency modules built on U.S. soil. Developers weighing module suppliers for 2027 to 2028 procurement cycles can incorporate Toyo’s expanded offering to meet domestic content and timeline requirements.
Reporting via the original publisher
