Repsol and Power to Hydrogen complete validation of technology claiming 16% lower hydrogen production cost

Repsol and P2H2 close a joint validation

Repsol and Power to Hydrogen (P2H2) have completed the validation of a technology for producing renewable hydrogen, Europa Press reported from Madrid on 8 September. According to the agency, the technology could reduce the levelised cost of hydrogen production by 16% compared with conventional electrolysers. The announcement marks the conclusion of a joint technical programme between the Spanish energy group and P2H2 — a validation milestone rather than an investment decision or a construction commitment.

The 16% saving is the only quantified performance claim attached to the validation in the Europa Press report. Capital cost, stack capacity, electrical efficiency, expected operating hours and any commercial deployment schedule were not disclosed, and no baseline was published specifying which conventional electrolyser configuration the comparison is drawn against. That leaves the headline number verifiable only once the companies release the assumptions behind it.

Why levelised cost is the number that decides projects

The levelised cost of hydrogen aggregates capital spending, electricity, operations and maintenance and lifetime utilisation into a single figure per kilogram. It is the metric against which offtake contracts, subsidy applications and final investment decisions are benchmarked, which makes a claimed 16% reduction material rather than cosmetic. It is also the metric most sensitive to assumptions: for renewable hydrogen, the power price and the load factor of the plant usually dominate the calculation, while the electrolyser itself accounts for a smaller share.

That distinction shapes how the claim should be read. A saving delivered through cheaper equipment behaves differently from one delivered through higher electrical efficiency. The first scales with capital intensity and matters most where financing is expensive; the second scales with the power price a project actually pays and matters most where electricity is dear or the plant runs at high utilisation. The Europa Press report does not specify which mechanism produces the 16%, nor whether the saving holds across different power price and load-factor scenarios.

Where the claim lands in the market

Renewable hydrogen has been the sector with the widest gap between announced pipelines and executed projects. Across Europe, developers have repeatedly delayed, resized or shelved schemes where production costs failed to converge with what buyers in refining, ammonia, steel and heavy transport were willing to pay. Cost reductions that arrive from the equipment side are therefore watched closely by the small group of industrial offtakers that can absorb renewable hydrogen at scale.

Repsol sits in that group as a buyer as well as a producer. Refineries already consume hydrogen in desulphurisation and hydrocracking processes, which means renewable volumes substitute an existing input rather than creating a new market from zero. A technology that lowers unit production cost therefore has a captive internal customer before any external offtake contract is signed — a structural advantage over merchant hydrogen projects that must first secure buyers.

What has been disclosed and what has not

• Disclosed: completion of the validation by Repsol and P2H2, and a claimed 16% reduction in the levelised cost of hydrogen versus conventional electrolysers.
• Not disclosed: capital cost per unit of capacity, stack or system size, and electrical efficiency.
• Not disclosed: the electrolyser technology used as the comparison baseline and the electricity price and load-factor assumptions behind the 16%.
• Not disclosed: any timetable for scale-up, a pilot-to-commercial pathway or an associated investment figure.

The next verifiable step is a scale-up decision: a demonstration unit at industrial size, a first commercial order, or the publication of the cost assumptions underpinning the comparison. Until one of those appears, the 16% remains a laboratory-to-pilot result rather than a delivered cost for hydrogen leaving a plant gate.