With the commercial operation of the battery storage system in Balzhausen, green flexibility and Entrix have reached another milestone in their collaboration. For several weeks, the system has been marketed across all relevant energy markets, generating revenue while also contributing to the integration of renewable energy and the stabilization of the power grid.
Balzhausen is already the second battery storage project that green flexibility and Entrix have successfully delivered together. The smooth commissioning underscores the strength of their partnership and the shared commitment to delivering innovative battery storage projects across the entire lifecycle: from development to commercially successful operation.
Commercially viable operation despite limited grid connection capacity
The Balzhausen project is a prime example of how battery storage systems can be operated profitably even at sites with grid restrictions. Entrix's AI-based multi-market optimization incorporates grid constraints directly into the trading strategy, enabling optimal use of the available grid capacity.
The optimization is automated across all relevant energy markets, including frequency containment reserve (FCR), automatic frequency restoration reserve (aFRR), as well as day-ahead and intraday trading. Market data, the battery's operating status, and technical grid connection requirements continuously feed into the trading algorithm. In Balzhausen, the grid operator also communicates potential feed-in restrictions up to two days in advance. Entrix developed the interface needed to incorporate these restrictions into trading in a timely, fully automated manner.
This approach is complemented by the concept of the “feed-in socket” (Einspeisesteckdose), developed by LEW Verteilnetz (LVN). At the heart of the concept is the overbuilding of the grid connection: several generation and storage facilities share a limited feed-in capacity whose output is lower than the sum of the installed plant capacity. Through coordinated, grid-neutral operation, the available grid capacity can be used more efficiently, enabling the connection of additional facilities.
“The successful operation in Balzhausen shows that economically viable battery storage systems do not depend on unrestricted grid connections. What matters is intelligently factoring restrictions into the marketing strategy. This is precisely where our strength lies: we combine AI-powered trading strategies with deep technical integration of the asset, enabling optimal performance even under demanding grid connection conditions. We are delighted that after our first joint project green flexibility is once again choosing to work with Entrix, confirming our strong partnership.”
“With Balzhausen, we have successfully brought our second joint battery storage project into commercial operation. The project shows how innovative grid connection concepts and intelligent trading and optimization go hand in hand. With Entrix, we have a partner at our side who integrates the project's technical framework conditions into the marketing while continuing to enable the economic operation of the storage system.”
With this project, Entrix and green flexibility demonstrate how battery storage systems can be operated economically even under demanding grid connection conditions while simultaneously providing additional flexibility to the energy system.