- Large scale electrolysis in Denmark now delivers real time grid balancing and certified green hydrogen at the same time.
- Breakthrough shows how hydrogen can strengthen power system stability as renewable energy grows.
- Model offers lessons for markets pursuing flexible and resilient energy systems, including Africa.
Herning, Denmark, 22 December 2025. Everfuel has reached a global milestone in the energy transition by becoming the first company in the world to operate a large scale electrolyser that both balances the electricity grid and produces certified green hydrogen at the same time.
The HySynergy plant in Fredericia is now providing automatic balancing services to the Danish power system while continuing normal hydrogen production. The achievement confirms that electrolysis can function not only as a production technology, but also as an active asset for grid stability in systems with high shares of wind and solar power.
The project is the result of long term collaboration between Everfuel, Danish transmission system operator Energinet, and energy trading company Centrica. HySynergy is now the first Power to X facility in Denmark approved to participate in Energinet’s balancing services, opening the door for similar projects in the future.
According to Everfuel, the breakthrough demonstrates that green hydrogen can be fully integrated into the wider energy system. By adjusting electricity consumption within minutes, the plant helps stabilise the grid during periods of imbalance while supporting national and European climate targets.
Energinet highlighted the importance of flexible electricity consumers as renewable generation expands. With wind and solar output fluctuating throughout the day, technologies that can rapidly increase or reduce demand are becoming essential to maintaining a stable power supply. The inclusion of electrolysis in balancing markets marks a significant step forward.
Centrica said the project shows the value of innovation and cooperation in creating more efficient and sustainable energy markets. By combining hydrogen production with real time balancing, the partners are delivering both system stability and progress toward decarbonisation.
For energy markets in Africa, where renewable capacity is expanding and grid flexibility is increasingly critical, the HySynergy model provides a clear example of how green hydrogen and Power to X solutions can support both energy security and long term sustainability.
Author: Bryan Groenendaal
