Houston-Based Transition Industries Signs EPC Deal for 210 MW Electrolyzer at Pacifico Mexinol

Transition Industries has signed a definitive EPC agreement with Siemens Energy and Techint E&C for the roughly 210 MW electrolyzer at Pacifico Mexinol in Sinaloa. The deal moves the plant from engineering into a construction contract. Construction is expected to start in early 2027, once conditions precedent, including project financing, are met.

Siemens Energy says the facility would be its largest electrolyzer installation in the Americas. It's a real execution milestone for one of North America's largest planned low-carbon chemical projects.

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What Did Transition Industries Sign with Siemens Energy and Techint?

Transition Industries signed a definitive engineering, procurement and construction agreement on October 28, 2026, covering the roughly 210 MW electrolyzer facility. Siemens Energy brings the electrolysis technology, and Techint E&C brings construction capability.

Transition Industries is a Houston-based developer of world-scale, net-zero carbon methanol and hydrogen projects in North America. Siemens Energy is a German energy technology company that builds PEM electrolyzers. Techint E&C is an engineering and construction contractor whose Mexico City unit dates back to 1954.

The agreement is subject to customary conditions precedent, including completion of project financing. No contract value was disclosed.

Transition Industries is co-developing the project with the International Finance Corporation, a member of the World Bank Group. Total investment in the complex is expected to exceed US$3.3 billion, according to a February 2026 Transition Industries announcement.

How Will Siemens Energy's Elyzer P-300 Make Renewable Hydrogen?

The facility will use Siemens Energy's Elyzer P-300, a proton exchange membrane (PEM) electrolyzer line that splits water into hydrogen and oxygen with electricity. Its hydrogen will support production of renewable fuels of non-biological origin, known as RFNBO, inside the methanol complex.

The plant was designed for about 4,000 kilograms of hydrogen per hour, according to Transition Industries' August 2025 FEED announcement. That works out to roughly 96 metric tons a day at full, continuous output.

Siemens Energy makes its PEM stacks at a Berlin electrolyzer factory it opened with Air Liquide on November 8, 2023. The company also won a 280 MW electrolyzer order from German utility EWE in July 2024, one of several large electrolysis projects moving forward worldwide.

Hydrogen demand keeps branching out, even into hydrogen-powered data centers. Methanol is one of the most practical outlets, because it stays liquid at ambient conditions and ships with existing infrastructure.

How Did Pacifico Mexinol Move from FEED to EPC?

The electrolyzer moved from a front-end engineering design (FEED) contract in August 2025 to a signed EPC agreement in October 2026, about 14 months later. Both stages involved the same three companies.

Stage	FEED	EPC
Announced	August 2025	October 28, 2026
Scope	Front-end engineering and design	Engineering, procurement and construction
Pricing terms	Binding not-to-exceed lump sum, then a final lump sum price for EPC	Not disclosed
Status	Engineering development	Signed, subject to conditions precedent, including financing

Under the FEED terms, Siemens Energy and Techint E&C were to provide a binding not-to-exceed lump sum price first. A final lump sum turnkey price for EPC would follow, but the October release doesn't share that figure.

The electrolyzer deal adds to earlier execution contracts. Techint E&C is already part of the main-plant EPC agreement with Samsung E&A, signed in July 2025. Italian contractor Bonatti signed a heads of agreement for port, pipeline and water reuse works in August 2025.

>> RELATED: Transition Industries and Mexico's CFEnergía Sign Natural Gas Supply Contract Enabling Construction of Pacifico Mexinol

Where Does the Electrolyzer Fit in the Methanol Complex?

The electrolyzer serves one of three production routes inside the 6,130 metric ton per day complex. Most of the volume comes from natural gas paired with carbon capture.

According to Transition Industries' October 2026 EPC release, planned annual output breaks down like this:

• About 175,000 metric tons of RFNBO methanol, supported by renewable hydrogen from the electrolyzer
• About 175,000 metric tons of recycled carbon fuel (RCF) methanol
• About 1.8 million metric tons of ultra-low carbon methanol from natural gas with carbon capture

Earlier releases described about 350,000 metric tons of green methanol a year, matching the first two routes combined. The gas route relies on a separate long-term supply contract with CFEnergía, a subsidiary of Mexico's Federal Electricity Commission. It covers about 160 million cubic feet of gas per day.

Japan's Mitsubishi Gas Chemical signed a long-term ultra-low carbon methanol purchase agreement in November 2025 for about 1 million metric tons a year. Methanol can also feed methanol-to-jet routes, a pathway drawing sustainable aviation fuel investment from airlines.

What Has to Happen Before Construction Starts in 2027?

Construction on the electrolyzer is expected to begin in early 2027, subject to conditions precedent, including completion of project financing. Until those conditions are satisfied, the signed contract can't move into full construction.

The wider site held a symbolic groundbreaking in April 2026, with field engineering and site preparation scheduled to follow. The EPC release targets operations in 2030, inside the late 2029 to early 2030 window Transition Industries set in February 2026.

The project is expected to create more than 6,000 construction jobs in Sinaloa, per Transition Industries' February 2026 announcement. At least 450 permanent roles will follow in operations.

What Does This Deal Mean for North American Hydrogen?

A signed 210 MW EPC contract gives North America a contractor-backed renewable hydrogen project tied to a named methanol buyer. Siemens Energy says it would be the company's largest electrolyzer installation in the Americas.

It also lands as the region builds other decarbonization infrastructure, from direct air capture facilities in Louisiana to onshore CO2 storage projects. Pacifico Mexinol pairs renewable hydrogen and carbon capture at one coastal site.

Financing is the next gate. Once it closes, a 210 MW electrolyzer could start rising on Mexico's Pacific coast in early 2027.

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