Munich/Vienna/Alfeld, December 2024 – A major milestone for the energy transition: Danish investor Obton A/S, in collaboration with leading flexibility traders Entelios AG and enspired GmbH, is developing an innovative large-scale battery storage project in Alfeld, Lower Saxony. With a power capacity of 137.5 MW and an energy capacity of 306 MWh, the facility is one of the largest battery storage projects in Europe and is expected to go live by mid-2026.
For Entelios and enspired, Alfeld marks the third joint storage project with Obton. The facilities in Tangermünde (15.8 MW; 35 MWh) and Karstädt (20.7 MW; 41.4 MWh) are also traded by the two specialists. Together, the three projects boast a combined storage capacity of 392 MWh, equivalent to almost one-third of the currently installed capacity of large-scale battery storage systems (BESS) in Germany.
This partnership seamlessly combines cutting-edge technology with market-leading expertise, demonstrating how BESS can significantly enhance grid stability and accelerate the integration of renewable energy sources.
Alfeld Energy Storage: The Next Generation of Large-Scale Battery Systems
The Alfeld BESS project is a vital contribution to the energy transition, bolstering the development of a sustainable energy infrastructure in a region heavily reliant on renewable energy. The facility serves several key functions:
- Storing surplus energy: Electricity from wind and solar installations is stored and fed back into the grid as needed to ensure a stable power supply.
- Enhancing grid stability: The battery mitigates grid fluctuations and contributes to frequency regulation through participation in ancillary services, including the aFRR market.
- Improving supply security: The facility strengthens the regional energy infrastructure and boosts its resilience against challenges.
With a capacity sufficient to power one million households for an hour, the Alfeld battery sets new benchmarks in BESS.
Strategic Collaboration for Maximum Efficiency
Entelios and enspired bring their proven expertise in flexibility trading to unlock the full potential of the Alfeld BESS. Entelios, Europe’s pioneering provider of demand response solutions, specialises in aggregating and trading flexibility. The company develops innovative approaches to efficiently integrate energy flexible industrial plants and battery storage systems into the electricity grid, while enhancing grid stability.
“The project in Alfeld underlines how close cooperation and technological innovation can decisively advance the integration of renewable energies. As a pioneer in flexibility trading and with our in-depth expertise in the optimisation of complex systems, we are making a significant contribution to ensuring grid stability and creating a reliable, future-oriented energy supply,” emphasises Fabian Becker, CEO of Entelios.
enspired handles the cross-market commercial optimisation of the BESS, using an in-house, state-of-the-art digital infrastructure with powerful algorithms. The company focuses on efficient flexibility trading in the short-term and optimisation in the control reserve markets, maximising the economic benefits of the project.
“The battery storage project in Alfeld is an outstanding example of how advanced optimisation technology and intelligent market integration can go hand in hand. Our highly developed, fully automated trading strategies maximise the flexibility of the system, optimise market participation, and make a meaningful contribution to the energy transition,” explains Jürgen Mayerhofer, CEO and Co-founder of enspired.
Martin Poscholann Christensen, Investment Manager for Energy Storage at Obton, adds,
“We started to look into 2-hour battery storage systems, with aFRR included in the revenue stack, and we felt that enspired, together with Entelios, were most capable at developing the strategy and actually explaining that strategy to us. And we also felt that they would be the quickest to adapt to any new strategies or revenue sources in the future.”
Intelligent and Advanced Cross-Market Optimisation
Through the partnership between Entelios and enspired, the Alfeld battery system can participate simultaneously in all relevant short-term markets. These include day-ahead, intraday, aFRR, and FCR markets, with dynamic adjustments based on grid needs and price signals. This flexible cross-market optimisation ensures the optimal use of resources and makes the system resilient to varying market conditions, allowing for maximised profitability across different market opportunities. This intelligent and diversified trading approach not only supports the integration of renewable energy into the grid but also reduces overall electricity costs.
The Alfeld project is a shining example of how modern BESS technology and advanced cross-market strategies meet the challenges of the energy transition, laying the foundation for a sustainable and stable energy future.
EPC Expertise by Kyon Energy
Kyon Energy, a leading EPC service provider for large-scale storage solutions based in Munich, is responsible for the development and construction of the Alfeld battery storage project. With extensive experience in planning and implementing innovative energy storage systems, Kyon Energy ensures that the facility meets the highest standards of performance, efficiency, and safety. The company’s precise execution and technical expertise position Alfeld as a flagship project for modern battery storage technology in Germany, underscoring the importance of high-quality implementation for a sustainable energy future.
A game changer for the energy transition
The scheduled commissioning of the Alfeld project in late 2025 will significantly boost the integration of renewable energy and grid stability in Germany. This large-scale battery system represents a key step in reducing reliance on fossil fuel power plants and making a substantial contribution to climate protection.
It underscores that investments in the energy transition can be both sustainable and profitable—without the need for subsidies. Alfeld symbolises the transformative power of innovation and partnership. Together, the project partners are setting new standards in the development of modern energy storage solutions, proving that the energy transition is not only achievable but also economically viable.
About Obton
Obton is a leading investor and operator in renewable energy, headquartered in Denmark. The company specialises in the development, financing, and management of sustainable energy projects, particularly solar and battery storage systems. With a portfolio spanning multiple countries and an installed capacity of several gigawatts, Obton is a pioneer in green energy investments. By fostering long-term partnerships and adopting innovative approaches, Obton drives the energy transition forward, blending economic efficiency with environmental responsibility. The Alfeld project expands Obton’s presence in Germany and sets new benchmarks for integrating large-scale storage systems into energy infrastructure.
About enspired
enspired is a pioneer for the commercial optimization of batteries and other power assets across the wholesale, control reserve, and ancillary service markets. The company’s fully automated in-house trading platform is the fastest on the European short-term power market and enables customers to monetize the full potential of their flexibility with minimum time-to-market. Maximum profitability is achieved through technologically advanced, data-driven, and AI-powered trading strategies.
About Entelios
Founded in 2010, Entelios is a European pioneer in industrial demand-response services, with extensive experience in flexibility optimisation for complex systems in ancillary services and spot market trading. Using proprietary systems, Entelios maximises client revenue by trading flexibility across all relevant short-term markets and dynamically shifting capacity between FCR, aFRR, and intraday markets. Tailored consulting and identifying flexibility potential are core elements of Entelios’ approach. As a comprehensive service provider for balancing reserve markets, Entelios supports clients throughout the prequalification process and secures participation through its reserve pools.
Media contacts:
Entelios AG www.entelios.de
Benjamin Dausch
Marketing & Sales Manager
E-Mail: benjamin.dausch@entelios.de
