40 million euros for flexible grid management

06.06.2025

Source: E & M powernews

A battery storage facility with a capacity of 80,000 kWh is being built in Balzhausen in southern Germany - as part of the "feed-in socket" pilot project of LEW Verteilnetz GmbH.

In Balzhausen, Bavaria, the company Green Flexibility is building a battery storage facility with an output of 40 MW and a storage capacity of 80,000 kWh. 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 are aiming to start construction in the third quarter of 2025, with commissioning scheduled for the same year. According to Green Flexbibility, the investment costs amount to around 40 million euros.

The core of the project is what is known as grid-neutral operation: In certain situations, such as when there is a high feed-in from photovoltaic systems, the grid operator may limit the output of the storage system. In this way, grid bottlenecks are to be avoided without having to maintain additional conventional reserve capacity. Control is carried out on a quarter-hourly basis based on technical specifications and in coordination with all parties involved.

"The ability to operate our battery storage system in Balzhausen in a grid-neutral manner underlines our commitment to creating not only innovative but also grid-friendly solutions for the energy transition," says Christoph Lienert, Co-Founder and Managing Director of Green Flexibility. The aim is to reconcile the integration of renewable energies with the requirements of the electricity grids.

LVN's "feed-in socket" concept is aimed at flexibly connecting decentralized systems. The storage facility 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.

The company takes care of all implementation steps - from the search for a location and planning to the operation and marketing of the systems. According to the company, the aim is to use storage solutions to stabilize the power supply and support the feed-in of renewable energies.

Author: Davina Spohn