Storage Market Booming: Germany’s Largest Battery Storage System with 740 MWh is Being Built in Förderstedt
Kirchheim/Förderstedt (Germany) - The battery storage market in Germany continues to gain momentum. In Förderstedt near Staßfurt, construction of what is currently the largest battery storage facility in Germany is progressing rapidly. The project is designed to provide a storage capacity of 740 megawatt-hours (MWh).
Storage project “Eco Power Three” sets new standards in Germany
With the “Eco Power Three” project, a battery storage system with a planned output of 300 megawatts (MW) and a capacity of more than 700 MWh is being built in Saxony-Anhalt. According to the project developer Eco Stor, around 300 pre-assembled battery systems are scheduled to be delivered and installed by the end of June 2026.
The project is one of the most significant storage initiatives in Germany’s energy transition. As Eco Stor points out, the facility could theoretically supply up to 500,000 households with electricity for around two hours.
The large-scale storage system will be divided into three independently operable blocks. This modular structure enables phased commissioning, meaning that initial parts of the facility could already go online in the second half of 2026.
The project is being implemented by Eco Power Three GmbH, a subsidiary of storage developer Eco Stor. Since construction began in summer 2025, work has been progressing according to schedule, Eco Stor said.
Large-scale battery storage systems are considered a key component of the energy transition. They store surplus electricity from renewable energy sources and can balance grid fluctuations within seconds.
Germany’s storage market is growing strongly
As renewable energy expansion continues, the need for flexibility in the electricity market is increasing. Battery storage systems benefit from price fluctuations on the electricity exchange by storing electricity when prices are low and feeding it back into the grid when demand is high. At the same time, they provide important grid-supporting functions.
The falling cost of battery systems is leading to significantly larger capacities in new projects. While large battery storage systems a few years ago were typically below 100 MWh, current installations already exceed 200 MWh. With the Förderstedt project, the scale now increases to 740 MWh - bringing the 1,000 MWh per project mark within reach.
As of the end of March 2026, around 2.4 million battery storage systems with a total output of 17,000 MW and a storage capacity of about 27,700 MWh were installed in Germany. In addition, pumped-storage power plants provide around 6 GW of capacity and approximately 25 GWh of storage.
The International Association for Renewable Energies (IWR) expects that, if the expansion trend continues with around 2 GWh added in the first quarter of 2026, Germany’s battery storage capacity could rise to up to 35 GWh by the end of 2026.
Global battery market growing even faster - significantly larger projects internationally
In international comparison, battery storage systems are already reaching significantly larger scales. For example, the United Arab Emirates is planning a storage system with 19 GWh of capacity. In Saudi Arabia, the “BYD Saudi Arabia, Phase 3” project is planned at 12.5 GWh, while India’s “Green Energy Corridor Phase II” project in Ladakh is designed for 12 GWh.
Among the world’s largest battery storage projects currently under construction are the Darden Clean Energy Project in California with 4.6 GWh and the Eraring Battery Expansion in New South Wales, Australia, with 2.8 GWh.
Source: IWR Online, 27 Apr 2026
