The partnership
enspired is optimizing the flexibility of ECO POWER ONE, a large-scale BESS asset owned by ECO STOR, across all available revenue streams in collaboration with ancillary service integrator Entelios. Located in Bollingstedt, Schleswig-Holstein, and connected via TenneT, this groundbreaking project represents a significant milestone in the energy transition. With a capacity of 103.5 MW and 238.5 MWh, the battery storage system makes a substantial contribution to grid stability and supply security.
Header and photo rights: ECO STOR
The customer
ECO STOR is a leading developer, installer, and operator of battery storage solutions with a focus on sustainability and innovation. With a strong portfolio of large-scale storage projects in Germany, ECO STOR is actively driving the energy transition and supporting the integration of renewable energies into the power grid. As a technical operator, owner, and installer of battery storage systems, the company takes care of planning, operation, and maintenance to ensure maximum efficiency and safety. With projects like ECO POWER ONE, ECO STOR is setting new standards for storage technology and its role in a climate-friendly energy system.
The use case
ECO POWER ONE uses LFP cell chemistry and has a power capacity of 103.5 MW and an energy capacity of 238.5 MWh, making it one of the largest in all of Germany. The asset is a fully merchant project, optimized in a cross-market setup in wholesale and ancillary services. As the battery is connected to the network under an FCA (flexible connection agreement), its commercial use is affected by grid constraints. The optimization maximizes revenues around those constraints, ensuring value can be captured effectively despite the limitations.
Header and photo rights: ECO STOR
“ECO POWER ONE combines the expertise of all partners and makes a significant contribution to stabilizing the electricity grid and using renewable energy more efficiently. With enspired, we have an optimizer who shares our vision of a sustainable energy future. Their expertise and innovative approach are crucial to successfully positioning the 103.5 MW flexibility of this project in the German energy markets,” notes Stefan Englberger, Head of Commercial at ECO STOR.
“ECO POWER ONE impressively demonstrates how technological innovation and digital optimization can go hand in hand to make more efficient use of renewable energy. Our solution optimizes the flexibility of battery storage in short-term and control reserve markets and allows us to make a tangible contribution to grid stability and the energy transition. Optimization can be trickier with an FCA in place but thanks to effective collaboration with partners, achieving the commercial optimum is still very much possible,” adds Jürgen Mayerhofer, CEO and Co-founder of enspired.
Header and photo rights: ECO STOR
The environmental edge
ECO POWER ONE makes a decisive contribution to the integration of renewable energies and the stabilization of the electricity grid. In grid areas with a high proportion of wind generation, the storage system enables surplus energy from wind and PV systems to be utilized efficiently by storing it temporarily and feeding it into the grid as required. This approach effectively balances out grid fluctuations, while participation in control reserve markets supports frequency stability and increases security of supply. With its versatility, ECO POWER ONE creates a stable basis for the energy transition and strengthens the regional energy infrastructure.
In addition to its technological significance, ECO POWER ONE also sets new standards in environmental protection. The storage site is surrounded by animal-friendly fences while native planting creates valuable habitats for flora and fauna. With ECO POWER ONE, the partners are proving that ambitious projects can accelerate the energy transition and, at the same time, assume ecological responsibility.
