Munich/Vienna/Alfeld, December 2024. A major milestone for the energy transition: Danish investor Obton A/S, in collaboration with leading flexibility traders enspired and Entelios, 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 (at the time of writing). 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.
The next generation of large-scale battery storage
The Alfeld BESS project makes 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.
3D model of the Obton BESS project | Image and header rights: Kyon Energy
Strategic collaboration for maximum efficiency
enspired and Entelios bring their proven expertise in flexibility trading to unlock the full potential of the Alfeld BESS. enspired handles the cross-market commercial optimization 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 optimization in the control reserve markets, maximizing the economic benefits of the project. Entelios, Europe’s pioneering provider of demand response solutions, specializes 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.
Intelligent and advanced cross-market optimization
Through the partnership between enspired and Entelios, 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 optimization ensures the optimal use of resources and makes the system resilient to varying market conditions, allowing for maximized 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.
EPC expertise by Kyon Energy
Kyon Energy, a leading EPC service provider for large-scale storage solutions based in Munich, is responsible for developing and constructing 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 symbolizes 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 specializes 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 Entelios
Founded in 2010, Entelios is a European pioneer in industrial demand-response services, with extensive experience in flexibility optimization for complex systems in ancillary services and spot market trading. Using proprietary systems, Entelios maximizes 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.
About enspired
enspired is Europe's leading optimizer of battery energy storage systems (BESS), managing a portfolio of over 5 GW with 80+ grid-scale batteries and 800 MWh live in a cross-market setup, including the largest BESS in Germany. Powered by a data-driven, AI-based optimization platform, enspired achieves maximum revenues and integrates proven solutions for navigating grid constraints. The advanced technical infrastructure is developed 100% in-house and supports enspired’s global expansion across 12 countries in Europe and Asia with flexible and seamless adaptability to new markets and changing market conditions.
As the first and only optimizer publishing actual performance results, enspired is tackling the lack of transparency in the industry by providing insight into real, independently certified revenues of live assets, establishing a reliable benchmarking standard that helps asset owners get a true understanding of what their asset is worth.
Press contact
Magda Fankhauser
Head of Marketing
magda.fankhauser@enspired-trading.com
