Pilot project launched by Green Flexibility and LEW Verteilnetz

12.09.2025

Source: E & M powernews

Construction of a 40 MW battery storage facility is starting in Balzhausen, Bavaria. Green Flexibility and LEW Verteilnetz are implementing the "feed-in socket" pilot project there.

Construction work has begun on a new battery storage facility in Balzhausen, south of Augsburg. The storage facility has an output of 40 MW and a capacity of 80 MWh. Commissioning is planned for the beginning of 2026. The investment volume is around 40 million euros. The project is part of the "Einspeisesteckdose" pilot project of LEW Verteilnetz GmbH (LVN). It aims to integrate decentralized generation plants into the existing electricity infrastructure in a grid-friendly manner.

The partners announced the project in June (we reported). "Grid operators and storage operators are working hand in hand here - a model with exemplary character for the further expansion of battery storage in Germany," said Christoph Lienert, co-founder and Managing Director of Green Flexibility, in a press release on September 11.

Contribution to grid stability

The project follows the principle of grid neutrality: in certain situations, the LVN can reduce the feed-in power of the storage system in order to avoid bottlenecks in the electricity grid. In this way, grid bottlenecks are to be avoided without having to maintain additional conventional reserve capacities.

Control is carried out on a quarter-hourly basis based on technical specifications and in coordination with all parties involved. The aim is to better combine the operation of large-scale battery storage systems with the requirements of grid management.

LVN's "feed-in socket" concept is aimed at the flexible connection of decentralized systems. The storage system in Balzhausen is intended to absorb surplus electricity when, for example, the feed-in from photovoltaics exceeds the grid capacity. At times of high electricity demand, it can feed energy back into the grid to support grid stability.

Green Flexibility, based in Kempten (Bavaria), specializes in the development and operation of large-scale battery storage systems. The company was founded by several energy companies. The focus is on implementing storage systems at strategically important grid points.

According to Green Flexibility Managing Director Christoph Lienert, the project launch illustrates how new concepts can be implemented quickly. LVN points out that the feed-in socket has made additional grid connection capacity possible in a short space of time.

The battery containers and the necessary infrastructure will now be installed before the planned commissioning at the beginning of 2026.

Author: Heidi Roider