Repsol Alkaline Electrolysis Pivot, 400 MW Projects Scrapped, €155 M Grant, and 3 Core Project Advances (2021 to 2026)

Repsol’s Green Hydrogen Project Realignment Amid Economic Headwinds

Repsol’s green hydrogen strategy has matured from broad ambition to a focused execution model, driven by the need to de-risk projects in the face of economic and regulatory pressures. The company’s activities in 2025 marked a definitive pivot away from speculative, large-scale announcements toward a pragmatic approach grounded in projects with secured public funding and clear offtake agreements, primarily for decarbonizing its own industrial assets.

Pre-2025: Ambitious Announcements and Broad Goals

Prior to 2025, Repsol’s strategy was characterized by ambitious, large-scale targets that aligned with the general market hype surrounding green hydrogen. The company set a long-term goal of reaching 1.8 GW of installed electrolyzer capacity by 2030, positioning itself as a leader in Spain’s energy transition. This period saw the announcement of multiple large projects, including plans for significant capacity at its industrial complexes in Puertollano and Meirama, reflecting a strategy based on future market growth and declining production costs.

Post-2025: Pragmatic Pivot to Foundational Projects

The year 2025 served as a market correction for Repsol, forcing a strategic recalibration. This shift was underscored by the cancellation of two major projects and a significant downward revision of its long-term targets.

• In July 2025, the company cancelled its planned up-to-200 MW green hydrogen project in Puertollano, Spain, citing that the project was “technically and economically unfeasible.”
• This was followed in December 2025 by the cancellation of another 200 MW project in Meirama, where capital expenditure was reported to have surged by 50%, rendering the project inviable.
• Consequently, Repsol revised its 2030 electrolyzer capacity target down by as much as 63%, establishing a more conservative and achievable range of 0.7 GW to 1.2 GW.
• The new strategy focuses on advancing a core pipeline of 350 MW across three key projects, with a target to reach final investment decisions (FIDs) by mid-2026.

€155 M Grant, Repsol’s De-Risking via Public Funding

Repsol’s 2025 financial strategy for green hydrogen pivoted toward securing public funding to mitigate high capital expenditures and project inviability, a direct response to the cancellation of unfunded large-scale ventures. This move aligns with a broader industry trend where public-private partnerships are becoming essential for first-mover projects, a situation also seen with competitors like [Total Energies] and its government-supported ventures.

Securing Government Backing

With standalone project economics proving difficult, Repsol successfully integrated its strategy with national and European funding mechanisms. The company was selected to participate in Spain’s €1.2 billion Hydrogen Valleys program in February 2025, a key enabler for its projects. The most significant financial milestone was securing a €155 million grant under the Important Projects of Common European Interest (IPCEI) framework for its Cartagena electrolyzer, effectively de-risking a cornerstone of its revised strategy.

High-Profile Project Cancellations

The decision to seek public funds was directly informed by the failure of projects that lacked such support. The cancellations of the Puertollano and Meirama projects, totaling up to 400 MW of potential capacity, served as a clear signal that the market was not yet mature enough to support large-scale green hydrogen investments without subsidies. The stated reasons of economic unfeasibility and a 50% CAPEX surge for the Meirama plant highlight the extreme volatility and cost pressures affecting the sector, where many of the nearly 80 European green hydrogen projects stalled by 2025 faced similar issues.

Table: Repsol Project Cancellations and Public Funding (2025)

Repsol’s Supply Chain Alliances with Schroders and Solaria

To support its scaled-back but more concrete hydrogen ambitions, Repsol focused its 2025 partnership strategy on securing the renewable energy supply chain, a critical dependency for green hydrogen production. Recognizing that hydrogen costs are intrinsically linked to the price of renewable electricity, the company executed several key agreements to build a dedicated, low-cost power portfolio.

Renewable Power Agreements

Repsol’s primary partnership activity in 2025 was aimed at ensuring a stable supply of green electrons for its electrolyzers. In March 2025, it formed a partnership with Schroders Greencoat to develop a 400 MW renewable energy portfolio in Spain. This was followed by an agreement in November 2025 with Solaria to supply renewable power to its hydrogen refueling stations. The company also expanded its renewable footprint internationally, partnering with Stonepeak on a US solar project, indicating a broader strategy to control its renewable energy feedstock. This approach is common among integrated energy firms like [Chevron], which also pairs hydrogen development with large-scale renewable power investments.

Technology and Electrolyzer Collaborations

Beyond securing power, Repsol is also engaging in technology partnerships to enhance project efficiency. While the core Cartagena project uses established alkaline technology, the company is advancing a separate 200 MW project in central Spain in partnership with electrolyzer manufacturer Sunfire. This suggests a strategy of deploying mature, bankable technology for immediate needs while simultaneously exploring next-generation solutions, likely Solid Oxide Electrolysis Cells (SOEC) from Sunfire, for future cost reductions and improved performance.

Table: Repsol Key Green Hydrogen and Renewable Energy Partnerships (2025-2026)

Spain as the Core, Repsol’s Hydrogen Deployment Hub

Repsol’s green hydrogen activities are almost exclusively concentrated in Spain, leveraging its existing industrial footprint at refineries and the availability of national and EU-level public funding. This “decarbonize-from-within” strategy focuses on replacing grey hydrogen consumption at its own facilities, which provides a guaranteed offtake market and sidesteps the commercial risks faced by export-oriented projects.

Iberian Industrial Complex Focus

The company’s core projects are strategically located at or near its major industrial complexes. The 100 MW electrolyzer at Cartagena and the planned 150 MW facility in Tarragona are designed to directly supply its refineries, helping meet EU mandates for renewable hydrogen in industry. This integrated model allows Repsol to use hydrogen as a feedstock for producing renewable fuels and other low-carbon products, creating a closed-loop system that maximizes value and minimizes market risk, a strategy also being explored by refiners like [Phillips 66].

US Renewable Energy Expansion

While hydrogen production is centered in Spain, Repsol’s partnership with Stonepeak for a US solar project in December 2025 demonstrates a global approach to securing its renewable energy supply. This move provides geographic diversification for its renewable generation portfolio. It also offers a potential hedge and a foothold in the US market, which has its own distinct set of production incentives through the Inflation Reduction Act, should Repsol choose to expand its hydrogen activities there in the future.

Alkaline Electrolysis at Scale, Repsol’s Commercialization Path

Repsol is advancing from smaller pilot-scale electrolyzers to commercial-scale projects, focusing on established alkaline electrolysis technology for its foundational 100 MW Cartagena plant while exploring next-generation technologies through partnerships. This dual-track approach balances the need for immediate, reliable deployment with the long-term goal of improving efficiency and reducing costs.

Pilots to Commercial Plants

The company’s journey reflects a steady progression in scale. After installing a smaller 2.5 MW electrolyzer at its Petronor refinery, Repsol is now moving to projects an order of magnitude larger. The 100 MW Cartagena and 150 MW Tarragona projects represent a significant step towards industrial-scale production. The approval for construction of the Cartagena plant in late 2025 is a key validation point, marking the transition from planning to execution for its large-scale ambitions.

Technology Selection and Partnerships

For its most advanced project, the 100 MW Cartagena facility, Repsol has selected alkaline electrolysis, a mature and bankable technology suitable for large-scale deployment. However, the company is not solely reliant on one technology. Its partnership with Sunfire for a separate 200 MW project indicates an interest in high-temperature SOEC technology, which promises higher efficiencies, particularly when integrated with industrial heat sources. This shows a calculated strategy to deploy proven technology now while keeping options open for more advanced solutions in the future.

SWOT Analysis for Repsol’s Green Hydrogen Strategy

Repsol’s strategic pivot in 2025 highlights a shift from ambitious expansion to a de-risked, economically grounded model, forced by market headwinds. The company is leveraging its core strengths as an industrial hydrogen user but remains exposed to significant regulatory and cost-related threats that dictated its more cautious approach.

• Strengths: Repsol’s position as a major hydrogen producer and consumer provides a captive offtake market, mitigating a key risk for new projects. Its existing industrial sites offer integration synergies.
• Weaknesses: The high capital intensity of green hydrogen projects was exposed in 2025, leading to a significant reduction in its 2030 targets after two large projects were deemed unviable.
• Opportunities: The company successfully capitalized on public funding mechanisms like the IPCEI program and Spain’s Hydrogen Valleys, which have become critical enablers for its revised strategy.
• Threats: Soaring CAPEX and regulatory burdens, such as the EU’s RFNBO rules which could increase production costs by a third, remain major impediments to cost-competitiveness.

Table: SWOT Analysis for Repsol’s Green Hydrogen Strategy (2021-2025)

Repsol’s 350 MW FID Target, A Test for Scaled Production

The primary indicator to watch for Repsol’s green hydrogen strategy is its ability to reach a final investment decision (FID) on 350 MW of projects by mid-2026, as this will validate its new, more pragmatic approach. Success in this phase would confirm the viability of its de-risked, government-backed model and set the stage for future expansion.

Cartagena and Tarragona Progress

If Repsol formally announces FID on its 150 MW Tarragona project before the summer of 2026, following the construction start at the 100 MW Cartagena plant, it signals that its revised strategy is executable. Watch for announcements regarding engineering, procurement, and construction (EPC) contractors for these sites. A delay beyond 2026 for these FIDs would indicate that even with public grants, underlying economic or regulatory challenges persist.

Regulatory Impact on Costs

The evolution of the EU’s RFNBO rules on “additionality” and temporal correlation remains a critical variable. If the industry, including Repsol, receives concessions or clarifications that mitigate the projected 33% cost increase, it could accelerate FID timelines. Conversely, strict enforcement without adjustments could jeopardize the economics of the pipeline, even with existing grants. Monitor statements from Repsol executives on this topic during quarterly earnings calls, as they will be an early indicator of this risk materializing.

The questions your competitors are already asking

This report covers one angle of Repsol’s green hydrogen commercial strategy. The questions that matter most depend on your work.

• Which Spanish green hydrogen projects have final investment decision
• EU hydrogen additionality rules impact on cost
• Alkaline vs SOEC electrolyzer costs and efficiency
• Green hydrogen project capital cost trends Europe

This report does not answer these. Enki Brief Pro does.

Your question, your angle, your framework. SWOT, PESTL, scenario modelling. The same niche depth, built around the decision your work actually depends on.

Run your first brief in Enki Brief Pro