With the planned construction of a grid-supportive battery storage system pursuant to Section 11a of the German Energy Industry Act (EnWG), MaxSolar GmbH is setting another important milestone for a future-proof and resilient power grid. The storage system, located in the Bavarian district of Cham, will have a capacity of 5 MW and 25 MWh. Construction is scheduled to begin in May 2026, with commissioning planned for October 2026. The project represents the first grid-supportive storage system of its kind under Section 11a EnWG in this specific configuration.
Entrix will be responsible for the AI-based trading and optimization of the battery storage system. Intelligent trading and dispatch strategies will ensure that the storage system is operated in a way that is both grid-supportive and economically optimal.
The battery storage system can theoretically supply the electricity demand of approximately 5,000 average households for one day while simultaneously making a significant contribution to stabilizing the local power grid. Through its grid-supportive mode of operation, the system helps to avoid or significantly reduce the need for grid expansion measures – thereby also lowering grid expansion costs.
"With Entrix, we have gained a strong partner for this Germany-wide unique project. The cooperation enables us to operate battery storage systems economically and reliably even under challenging grid conditions."
"With the Wutzldorf project, we demonstrate how battery storage systems can reduce grid congestion and increase system stability. This approach offers a cost-efficient and scalable way to implement energy storage in regions with limited grid capacity. We are pleased to realize Germany’s first grid-friendly project together with MaxSolar."
The grid-friendly operation of the storage system is specifically aligned with the needs of the power grid: During periods of high photovoltaic feed-in – particularly during summer midday peaks – excess electricity is absorbed and stored, significantly relieving the local grid. In the morning and evening hours, when grid load is particularly high, the storage system is operated in a way that avoids drawing additional electricity from the grid. This operating model demonstrates that economic operation and grid support can go hand in hand. The storage system not only contributes to grid stability but can also be operated efficiently and in a market-oriented manner.
With this project, MaxSolar and Entrix demonstrate how battery storage systems can function as a central component of energy-efficient grids, acting as a link between renewable energy generation, grid stability, and economic efficiency.