PVTIME – US‑headquartered Power to Hydrogen (P2H2) and Spanish energy firm Repsol have concluded pilot testing of hybrid anion‑exchange‑membrane electrolyser hardware at Repsol’s All4Zero innovation hub. Trial performance matched or surpassed set targets for efficiency, flexibility and durability, validating AEM electrolysis as a potential lower‑cost solution for industrial‑scale renewable hydrogen output.
Over 1 250 hours of assessment, the stack operated across load levels of 40 % to 100 % and a pressure envelope of 2 bar to 30 bar. Irreversible degradation measured approximately 2 mV per 1 000 operating hours, with average cell voltage barely altered throughout the test sequence. Based on these findings, P2H2 forecasts a system service life in excess of 50 000 hours, five to ten times current standard benchmarks for AEM technology. Hydrogen purity leaving the stack hit 99.9 % at 30 bar, with consistent performance maintained across the full pressure range. The unit tolerated unplanned facility power outages and resumed operation without adverse effects. The stack design excludes iridium and PFAS materials, reducing critical mineral dependencies and regulatory risks associated with conventional PEM electrolysers.
Cost analysis built on Repsol operational inputs and the US Department of Energy H2A‑Lite framework produces a projected levelised hydrogen cost of €3.86 per kg, a 16 % reduction relative to established electrolyser technologies. Modelling for optimised renewable energy conditions under hybrid power purchase agreements indicates costs could fall to €2.82 per kg.
The two parties are assessing options for follow‑on demonstration hardware rated from 500 kW to MW scale. This work will back Repsol’s corporate objective to install 600 MW to 800 MW of renewable hydrogen capacity by 2030. P2H2 already operates comparable‑scale systems at the Port of Antwerp‑Bruges and in partnership with Norway’s SINTEF research body. The company’s AEM platform delivers sub‑50‑millisecond load response and high‑pressure hydrogen generation, engineered for seamless integration with variable renewable power supplies.
 and Spanish energy firm Repsol have concluded pilot testing of hybrid anion‑exchange‑membrane electrolyser hardware at Repsol’s All4Zero innovation hub. Trial performance matched or…){kind=link}