Dynelectro’s 250kW SOEC Electrolyser Completes 1,000 Hours of Operation in Iceland
The 250-kW Dynamic Electrolyser Unit at Syntholene Energy’s Húsavík facility has successfully completed Phase One, producing several tonnes of hydrogen and moving into high-power testing.
Viby Zealand, Denmark – October 2026 – Dynelectro’s 250 kW Dynamic Electrolyser Unit (DEU), equipped with G8X solid oxide stacks supplied by SolydEra, has successfully completed more than 1,000 hours of operation at Syntholene Energy’s demonstration facility in Húsavík, Iceland.
The achievement marks the successful completion of Phase One of the operating programme and represents an important step towards the commercial deployment of high-temperature solid oxide electrolysis technology.
The system was commissioned and producing hydrogen within ten days of arriving in Iceland and has since operated continuously while integrated with Syntholene’s geothermal heat infrastructure. Since first hydrogen production during Factory Acceptance Testing in Denmark, the DEU has produced more than six tonnes of hydrogen.
At the heart of the system are SolydEra G8X solid oxide stacks, integrated by Dynelectro into its turnkey electrolyser platform.
From technology to industrial deployment
The Húsavík project brings together three complementary areas of expertise: Syntholene’s geothermal and thermal integration, SolydEra’s industrial solid oxide stack technology and Dynelectro’s system integration, power electronics and Dynamic AC:DC control technology.
Dynelectro’s patented Dynamic AC:DC technology actively manages the electrical conditions applied to the stacks with the objective of supporting stable operation and reducing degradation under dynamic operating conditions.
The combination is designed to address one of the key challenges facing high-temperature electrolysis: bringing together efficiency, durability and flexible operation in a solution capable of moving towards industrial scale.
“Húsavík proves a complete, repeat-module SOEC electrolyser platform. This is the same Dynamic Electrolyser Unit design we will scale into MW-class commercial plants and seeing it commission in days and then run without intervention is exactly the validation we need before we do that at scale.” – Sune Lilbæk, CEO, Dynelectro
For SolydEra, the installation provides an important opportunity to validate its latest G8X stack platform in a real electrolysis application.
“Husavik is an important milestone for our G8X platform, as it represents its first deployment in electrolysis operation. SolydEra’s role in the project is to provide the solide oxide stack technology that Dynelectro integrates into its Dynamic Electrolyser Unit. The operating experience being generated in Iceland provides valuable validation for our G8X stack platform in a real industrial application.” – Alexander Liberov, CEO SolydEra
Building the case for scalable SOEC
High-temperature solid oxide electrolysis can use steam and available process heat to reduce the amount of electricity required for hydrogen production, creating significant potential for industrial applications where heat integration is available.
The Húsavík installation provides a real-world environment in which these benefits can be evaluated together with system durability, operational flexibility and performance.
With Phase One now completed, the programme is moving into Phase Two, which will focus on operation at higher loads, including sustained operation at or near full available power.
Further data will be collected on electrical efficiency, hydrogen production, thermal integration and system stability. Syntholene intends for the combined datasets to undergo independent third-party validation and support further engineering optimisation, techno-economic analysis and future commercial-scale projects.
“This is precisely the type of operating evidence the SOEC sector needs. Moving from efficient cells to bankable industrial assets requires proven stacks, intelligent control, rapid commis-sioning and stable operation in a real process environment. That is what the Húsavík program-me is now demonstrating.” – Sune Lilbæk, CEO, Dynelectro
The project also reflects SolydEra’s strategy of working with industrial partners and system integrators to bring its stack technology into a growing range of commercial applications.
“Projects like Húsavík reflect the way we want to bring our technology to market: working with strong partners who integrate our stack platform into their own solutions and system archi-tectures. For SolydEra, these industrial partnerships are key to expanding the deployment of our technology across different applications and markets.” – Dr. Alexander Liberov, CEO, SolydEra
About Dynelectro
Founded in 2018, Dynelectro is a Danish solid oxide electrolyser OEM developing high-efficiency renewable hydrogen solutions for industrial decarbonisation and energy resilience. Its proprietary Dynamic AC:DC architecture is designed to combine the efficiency of high-temperature SOEC technology with extended stack lifetime and dynamic operation.
Dynelectro’s modular Dynamic Electrolyser Unit platform is designed to scale from 250 kW validation systems to more than 20 MW industrial installations, supporting the development of cost-effective renewable hydrogen for e-fuels and industrial applications.
www.dynelectro.dk
About SolydEra
SolydEra is a leading international player in solid oxide technology, developing and manufacturing cells, stacks, modules and solutions for efficient power generation and hydrogen production. Its technology platform operates in fuel cell, electrolysis and reversible modes, enabling applications across distributed power, industrial energy, data centres, critical infrastructure and hydrogen production.
SolydEra combines more than two decades of experience with automated manufacturing capabilities and R&D activities in Italy, Switzerland and Australia.
www.solydera.com
Media Contacts
Dynelectro
Kristian Ehrenskjold Laursen
Sales & Business Development Manager, Dynelectro ApS
Phone: +45 29 66 08 27
Email: krla@dynelectro.dk
SolydEra Group
Katia Pianezze
Communication & Marketing Manager
Phone: +39 342 010 0011
Email: katia.pianezze@solydera.com