TOYO Co., Ltd. has completed the expansion of its solar module factory in Humble, Texas, lifting the facility’s nameplate capacity to 2 gigawatts. The company separately plans a $357 million heterojunction (HJT) solar cell facility at the same site.
The move marks the next step in a broader push to build a domestic solar manufacturing supply chain. The Tokyo based company, which trades on Nasdaq as TOYO, held a ribbon-cutting ceremony at the site on October 6.
Representatives from the U.S. Department of Commerce and the Consulate General of Japan in Houston attended the event.
What the expansion delivers
On October 6, TOYO Co., Ltd (Nasdaq: TOYO), a solar manufacturer, held a ribbon-cutting ceremony at its solar module manufacturing facility in Humble, Texas, marking the completed expansion of the facility’s module nameplate capacity to 2 GW.
The upgraded plant now produces output equivalent to roughly 3.3 million panels a year at an assumed 600 W per module , according to a report from Construction Review Online that cited the project’s figures.
Under secretary of commerce for industry and security Jeffrey Kessler attended the ceremony, and said that the expanded manufacturing plant fits into the current administration’s plans to incentive building new domestic manufacturing facilities. He said “Toyo’s announcement is the direct result of the Trump Administration’s bold policies to bring manufacturing and jobs back to America.”
Kessler added that “by investing hundreds of millions of dollars to expand its Texas factory, onshoring overseas production, and committing to use exclusively US polysilicon, Toyo is making an important contribution to America’s manufacturing renaissance.”
TOYO Chairman and CEO Takahiko Onozuka framed the milestone as a transition point for the company. He said “Completing our 2 GW module expansion in Texas is an important milestone for TOYO, and cell manufacturing with HJT technology is our next step.”
Next stop: domestic cell production
The module line has been the finished phase of a larger buildout. Earlier in the day, the company hosted an Analyst Day, where management presented the Company’s strategy and growth plans, and shared its plans for a heterojunction (HJT) cell line in Texas, which the company expects to complete in the first quarter of 2028 .
Completion of the cell line is expected in the first quarter of 2028, as cell manufacturing is the company’s next development stage following the module expansion.
The planned cell facility is sized to complement the expanded module plant. TOYO said the facility will be co-located with its existing module lines and is designed for 1.5 GW of annual cell capacity, a volume equal to three quarters of the module capacity now installed at the Humble site . The cell facility carries its own price tag according to the company’s investor relations announcement, which outlined a $357 million, 1.5 GW HJT solar cell facility in Texas, separate from the cost of the module expansion just completed.
That buildout would address a persistent gap in the U.S. solar supply chain, a mismatch GCN has previously reported leaves assembly lines many times larger than domestic cell production.
TOYO’s current production relies in part on overseas operations outside the Humble site. In a separate dispute over an antidumping and countervailing-duty investigation involving the company’s Ethiopia-based cell operations, TOYO chief strategy officer Rhone Resch told PV Tech that the company’s Ethiopia cells rely on imported materials from the United States and other countries.
Jobs and tax credit potential
TOYO expects the HJT investment to translate into both federal incentives and local employment. The project is expected to create roughly 400 direct manufacturing jobs, leverage Inflation Reduction Act production credits, optimize logistics and capital efficiency, and strengthen TOYO’s positioning as a FEOC-compliant, U.S.-based supplier of high-efficiency solar technology .
Company officials say the choice of HJT technology is intended to position the Texas site competitively for buyers who want higher performing panels. The HJT cells will be able to offer higher efficiency levels for the North American market and beyond, as well as better heat tolerance and lower degradation levels, the firm says.
Quality assurance inspectors who reviewed the expanded module plant gave it high marks. Paul Wormser, Senior Vice President of CEA Intertek , audited the facility, and his team reportedly found very few issues during the quality review.
Why it matters for the supply chain
TOYO’s move comes as the broader U.S. solar manufacturing buildout faces financing headwinds. Industry trackers have noted a hesitant financing climate for new U.S. solar manufacturing expansions, even as select projects could still move the sector’s overall spending outlook.
The expansion also lands amid continued federal scrutiny of import rules and tariffs affecting solar components, an area where GCN has tracked related rate and compliance disputes including the utility rate cases playing out as electricity demand and grid investment both climb nationwide.
The module expansion was first announced in June 2026, and TOYO’s follow-on HJT cell line represents one of the more concrete steps yet toward building a fuller vertically integrated solar supply chain inside the United States.
