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Tomball is in line for another major industrial investment as Houston-based SEG Solar moves forward with plans for a $950 million solar cell manufacturing facility that could bring more than 700 new jobs to northwest Harris County. The announcement comes just months after the company celebrated the opening of its $200 million solar module factory in Tomball, with another large manufacturing facility already under construction nearby.

On October 29, 2026, SEG Solar announced that it has signed a land agreement for a new 4-gigawatt (GW) heterojunction (HJT) solar cell manufacturing plant at its existing Tomball Industrial Campus. The proposed facility would be developed in two phases, with the first targeted for 2028 and the second for 2029.

For Tomball residents and the surrounding northwest Houston communities, the announcement represents more than another factory. It could mean hundreds of additional manufacturing careers, new opportunities for local suppliers and continued investment in an area that is becoming an increasingly important part of the Houston region's advanced manufacturing economy.

The latest project would also mark a significant step in SEG Solar's efforts to manufacture more of its solar products domestically, bringing solar cell production together with the company's existing and planned solar module operations in Tomball.

New $950 Million SEG Solar Facility Would Create More Than 700 Jobs in Tomball

According to SEG Solar, the proposed solar cell plant would add 4 GW of annual manufacturing capacity once both phases are operational. Each phase is expected to contribute approximately 2 GW of capacity, with completion targets of 2028 and 2029.

The company has not yet announced a construction start date, detailed hiring schedule or breakdown of the more than 700 jobs expected to be created.

The planned facility would sit adjacent to SEG's existing 4 GW Tomball #1 solar module factory and its 4.6 GW Tomball #2 manufacturing facility, which is currently under construction.

Together, these operations would make the Tomball Industrial Campus one of the few manufacturing locations in the United States where solar cells, finished modules and key components are produced at the same site.

That distinction is important because solar cells and solar modules are not the same thing. Solar cells are the individual components that convert sunlight into electricity, while solar modules are the finished panels made by connecting and protecting those cells.

By manufacturing both in Tomball, SEG Solar aims to reduce its dependence on outside suppliers for critical components while giving customers greater visibility into where their solar equipment is produced.

The new plant would use heterojunction technology, commonly referred to as HJT, which combines different types of silicon layers to improve solar cell efficiency and performance.

For residents unfamiliar with the solar industry, the technology is part of a broader effort to produce panels that can generate more electricity from a given amount of sunlight.

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Expansion Follows August Opening of SEG Solar's $200 Million Tomball Factory

The latest announcement follows a significant milestone for SEG Solar in Tomball.

On August 7, 2026, the company celebrated the inauguration of its $200 million solar module manufacturing facility at 20103 Clay Industrial Road in Tomball, an event attended by approximately 800 employees, government representatives, business leaders, customers and solar industry participants.

The more than 500,000-square-foot facility, known as Tomball #1, was designed to produce 4 GW of solar modules annually and became the largest U.S. module manufacturing plant SEG had built.

The factory includes four production lines designed to manufacture the company's SIERRA N series high-efficiency solar modules, using specialized production methods intended to improve durability and performance.

At the August opening, SEG indicated that commercial operations were expected to begin during the third quarter of 2026 as production-line installation was completed.

The company also highlighted its existing 2 GW manufacturing operation at 10625 Telge Road in Houston, which, combined with Tomball #1, brought its reported U.S. annual module manufacturing capacity to 6 GW.

But even as Tomball #1 was being celebrated, the company was already preparing for its next expansion.

SEG's Tomball #2 facility, previously described as a roughly 1.15 million-square-foot manufacturing and warehouse development, was under construction, with production targeted to begin in May 2027.

Once operational, the company projects that facility will add 4.6 GW of annual solar module capacity, bringing its total U.S. module manufacturing capacity to approximately 10.6 GW.

The newly announced $950 million solar cell facility would build on those investments by adding another stage of manufacturing rather than simply increasing finished panel production.

The distinction matters when considering the scale of the expansion: the planned 4 GW of solar cell capacity would complement the company's module production operations, not represent an additional 4 GW of finished module capacity.

Why SEG Solar Wants to Manufacture Solar Cells and Panels in Texas

One of the driving forces behind SEG Solar's Tomball expansion is the growing importance of domestically manufactured solar equipment.

Solar developers, utilities and other large energy customers increasingly consider where equipment is manufactured, particularly when evaluating federal domestic content requirements, supply-chain risks and project costs.

SEG says producing HJT solar cells in Texas would allow the company to supply American-made cells for its Texas-manufactured solar modules, providing customers with a more integrated domestic supply chain.

Jim Wood, chief executive officer of SEG Solar, explained the company's strategy in the October 29 announcement.

"Bringing HJT cell manufacturing to the U.S. will give customers a more domestic supply chain with clearer sourcing and a single company standing behind the product. As the only U.S. company dedicated to integrated domestic vertical manufacturing, SEG will continue to strengthen our U.S. operations and innovation. American-made cells, American-made modules, one company accountable."

The company's broader Tomball Industrial Campus is being developed to accommodate several connected operations, including solar cell manufacturing, solar module production, warehousing, a research and development center and a certified testing laboratory.

Plans also include production lines for ethylene-vinyl acetate (EVA), a material used to protect solar cells within finished panels, and junction boxes, which help connect solar modules to electrical systems.

Bringing these functions together could simplify certain manufacturing and logistics processes while supporting the company's goal of producing more solar equipment in the United States.

SEG also expects its Texas-made modules containing U.S.-produced HJT cells to help qualifying solar projects meet applicable domestic content requirements. Actual eligibility would depend on the requirements and component sourcing of individual projects.

What More Than 700 New Manufacturing Jobs Could Mean for Tomball and Northwest Houston

For local families, one of the most significant parts of SEG Solar's announcement is the prospect of more than 700 additional jobs.

Although SEG has not released a detailed list of positions for the proposed facility, advanced manufacturing operations generally require workers across several specialties, including equipment operation, maintenance, electrical systems, engineering, quality control, logistics, research and administration.

The expansion could create opportunities for experienced manufacturing professionals as well as residents interested in entering the industry through technical training and workforce development programs.

Workforce preparation was already a focus during the company's August factory opening.

Juliet Stipeche, executive director of the Gulf Coast Workforce Board, announced plans for deeper collaboration with SEG Solar involving workforce training and talent development.

The goal was to help connect local residents with the skills needed for advanced manufacturing positions while supporting the company's growing employment needs.

Specific enrollment opportunities, training schedules and hiring procedures for the newly proposed solar cell plant have not yet been announced.

Local economic development and business organizations have also taken an interest in SEG's growth.

During the August opening, Bobby Lieb, CEO of the Northwest Houston Chamber of Commerce, pointed to the company's investment as an example of confidence in the region's workforce and business environment.

Craig Rhodes, senior vice president of the Greater Houston Partnership, also discussed opportunities to connect SEG with Houston-area suppliers and research institutions as the solar manufacturing industry expands.

For businesses throughout Tomball, Cypress, northwest Harris County and the greater Houston area, the company's continued growth could create additional demand for industrial services, equipment maintenance, transportation, specialized contractors and other manufacturing support.

Those potential economic benefits will depend on construction progress, hiring decisions and how much of the company's supply chain is sourced locally.

Tomball's Growing Role in Houston's Energy and Manufacturing Economy

Houston has long been recognized as one of the country's leading energy centers, particularly in oil, natural gas, petrochemicals and related industries.

SEG Solar's investment reflects another side of that energy economy, as manufacturers develop equipment used in solar power generation and other electricity infrastructure.

The company's growth also comes amid increasing attention to electricity demand from data centers, artificial intelligence infrastructure, industrial facilities and population growth.

At the August opening of Tomball #1, SEG founder and Chief Operating Officer Jun Zhuge connected the company's manufacturing expansion to those broader energy needs.

"The rapid growth of artificial intelligence and data centers is driving unprecedented demand for reliable electricity and accelerating the need for new energy infrastructure," Zhuge said.

For Tomball, the expansion adds another large industrial employer to an area already experiencing commercial, residential and business development.

The region's access to major transportation corridors, the greater Houston labor market and established industrial services makes northwest Harris County a location for companies seeking to serve both domestic and international markets.

SEG's growing presence is particularly notable because its plans extend beyond a single factory. The company is developing multiple connected manufacturing operations that would support different stages of solar panel production.

That concentration could strengthen Tomball's position within the U.S. solar manufacturing industry if the planned facilities are completed and reach their intended production levels.

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Founded in 2021, SEG Solar is a Houston-headquartered photovoltaic manufacturer that supplies solar modules for utility-scale, commercial and residential applications.

The company describes its business as vertically integrated, meaning it is working to control multiple stages of the solar manufacturing process rather than relying entirely on outside companies for individual components.

By the end of 2025, SEG reported shipping more than 7.5 GW of solar modules worldwide and reaching 6.5 GW of annual module production capacity across its operations.

In addition to its U.S. investments, SEG is developing an integrated solar manufacturing operation in Indonesia.

The company previously indicated that its Indonesian industrial park was expected to include manufacturing processes ranging from silicon ingots through solar cells by 2027, with additional HJT production capabilities planned as part of its longer-term strategy.

SEG has also emphasized product testing and independent verification. At its August Tomball factory opening, representatives from testing and certification company Intertek discussed the importance of third-party inspection in supporting confidence in solar equipment quality and manufacturing practices.

The company's Texas manufacturing strategy has been promoted under the phrase "Made in Texas. Powering America."

What's Next for SEG Solar's $950 Million Tomball Expansion?

With the land agreement now signed, attention turns to the next steps in developing the proposed solar cell facility.

SEG Solar has identified two production milestones:

• 2027: The Tomball #2 solar module manufacturing facility is targeted to begin production in May, adding 4.6 GW of annual module capacity.

• 2028: The first 2 GW phase of the new HJT solar cell manufacturing facility is targeted to come online.

• 2029: The second 2 GW phase is targeted to begin operations, bringing the proposed solar cell facility to its full 4 GW annual capacity.

The company has not yet provided a detailed construction timeline for the $950 million project or announced when recruitment for the anticipated 700-plus jobs will begin.

It also has not released information about potential local tax incentives, infrastructure agreements or other public financial arrangements associated with the newly announced facility.

Those details will be important as the project advances, particularly for residents interested in employment opportunities and the broader economic impact of the development.

For now, the land agreement marks another significant commitment to Tomball by a company that has already invested heavily in the area.

Just a few months after opening its $200 million factory, SEG Solar is outlining plans for a much larger manufacturing operation that could bring additional jobs, suppliers and specialized industrial activity to northwest Houston over the next several years.

For Tomball residents, the story is still unfolding, but the company's latest announcement offers another indication of how the local economy is changing as advanced manufacturing becomes a larger part of the region's industrial landscape.

My Neighborhood News will continue following SEG Solar's Tomball expansion, construction milestones and future hiring opportunities as additional details become available.

By Tiffany Krenek, My Neighborhood News 

Tiffany Krenek has been on the My Neighborhood News team since August 2021. She is passionate about curating and sharing content that enriches the lives of our readers in a personal, meaningful way. A loving mother and wife, Tiffany and her family live in the West Houston/Cypress region.

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