At Kerionics, we are redefining the way green hydrogen is produced through our proprietary technology based on the SOEL stack (Solid Oxide Electrolyzer Stack). Our focus is on delivering efficient, sustainable, and scalable solutions for the decarbonization of energy-intensive industries. The key lies in the development and manufacturing of solid oxide electrolyzer systems that enable hydrogen production with superior thermal and electrical efficiency. The SOEL stack is the core component of our high-temperature electrolyzers, serving as the essential element for maximizing performance and reducing operational costs.
The SOEL stack developed by Kerionics combines advanced materials engineering, modular design, and optimized manufacturing processes. This allows us to offer a competitive product in terms of efficiency, durability, and compatibility with existing industrial operations. Thanks to our research into solid oxide ceramic cells, our stacks operate stably under demanding conditions, leveraging waste heat to improve overall system efficiency and reduce external energy demand.
The SOEL stack is a set of electrochemical cells that convert steam into hydrogen using electricity and heat. Unlike other electrolysis technologies (such as PEM or alkaline), solid oxide electrolyzers operate at high temperatures (between 600°C and 850°C), which allows for greater thermodynamic efficiency and lower electrical consumption per kilogram of hydrogen produced.
This advantage makes the SOEL stack an especially attractive solution for industries that already generate waste heat, such as chemical manufacturing, steel production, and thermal power generation. At Kerionics, we design stacks tailored for these environments, using resistant materials, modular architecture, and an industrial focus on continuous performance.
Our value proposition is built around three fundamental pillars:
Additionally, our local manufacturing model and strategic alliances with research centers ensure continuous innovation and development, always aligned with our clients' needs and the broader energy transition.
The SOEL stack is not just a promising technology — it is already a reality in a variety of industrial environments. Its primary use is in green hydrogen production, but it can also be integrated into power-to-gas systems, synthetic fuel production, and large-scale energy storage projects.
Kerionics actively works with companies in sectors such as:
At Kerionics, we are continuously investing in R&D to enhance the performance of our SOEL stacks. Our multidisciplinary team of engineers, scientists, and technicians is focused on improving cells, interconnectors, sealing materials, and assembly methods. Our production facility is equipped with state-of-the-art technology to ensure consistent, traceable, and efficient manufacturing processes.
We proudly manufacture in Spain, promoting green reindustrialization and generating high-quality employment. We believe the energy transition should be coupled with local economic development, which is why we are committed to sustainable, proximity-based manufacturing.
Kerionics has implemented projects in collaboration with major players in the energy sector, supported by European innovation programs. We have validated our stacks in real-world environments, demonstrating their reliability and adaptability.
Currently, we are expanding the reach of our SOEL stack technology into international markets such as Germany, France, the United States, and Latin America — regions that are clearly committed to green hydrogen as a key energy vector.
Every technical decision we make at Kerionics is guided by sustainability principles. From material selection to product lifecycle design, we aim to minimize environmental impact while maximizing energy and economic benefits for our clients.
Moreover, our SOEL stacks enable a more circular economy by integrating into existing industrial processes, reusing heat, and closing energy cycles that would otherwise go to waste.
The SOEL stack is a fundamental piece of the puzzle in the transition toward a net-zero economy. At Kerionics, we are committed to leading this change through high-value technological solutions designed to meet the energy challenges of today and tomorrow. If you are looking for innovation, efficiency, and a genuine commitment to sustainability, Kerionics is your strategic partner in scaling up green hydrogen production.
