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Contract Award for Pilot Project "Grid Socket": green flexibility to Build 80 MWh Grid-Neutral Battery Storage System in Balzhausen

green flexibility is proud to announce its successful participation in the pilot project “Einspeisesteckdose” ("Grid Socket") initiated by LEW Verteilnetz GmbH (LVN). As part of this forward-thinking project, green flexibility will install and operate a large-scale battery storage system in Balzhausen with a power output of 40 megawatts (MW) and a storage capacity of 80 megawatt-hours (MWh).


Kempten, June 4, 2025


The “Grid Socket” project is a proactive pilot initiative aimed at efficiently and flexibly integrating decentralized generation systems into the electricity grid. green flexibility is implementing a regionally adapted operating model designed to actively support grid stability while promoting the integration of renewable energy sources.


Grid-Supportive Operation as a Key Element of the Energy Transition


One of the main criteria for selection was compliance with a grid-neutral operating mode. This enables the grid operator to temporarily curtail the output of the battery storage system in specific situations to prevent network congestion—particularly during periods of high photovoltaic input. This approach involves transparent coordination between stakeholders based on predefined guidelines and a continuous 15-minute data exchange.


The ability to operate our battery storage system in Balzhausen in a grid-neutral manner underscores our commitment to delivering not only innovative but also grid-supportive solutions for the energy transition,” explains Christoph Lienert, Co-Founder and Managing Director of green flexibility. “Our goal is to drive the energy transition forward without losing sight of regional grid requirements. Achieving this requires collaboration with all stakeholders and innovative concepts such as the Grid Socket.”


€40 Million Investment in the Energy Transition


The storage project is specifically designed to balance fluctuations in renewable electricity generation. It can absorb surplus energy when the grid is overloaded and feed it back into the system when demand increases. With this facility, green flexibility is making another important contribution to grid stability and helping to enhance regional supply security.


The investment volume is approximately €40 million. Construction is scheduled to begin in Q3 2025, with commissioning planned for the end of the year.



3D Rendering of the Project in Balzhausen
3D Rendering of the Project in Balzhausen

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