Construction of Germany’s largest battery storage facility to date is set to begin in Förderstedt, Saxony-Anhalt, on November 4, 2025. According to the operator, Eco Stor, the facility will have a capacity of 300 megawatts and a storage capacity of 716 megawatt-hours according to the operator Eco Stor. This means the facility could theoretically supply around 500,000 households with electricity for two hours. The storage facility in Saxony-Anhalt is scheduled to go into operation in the second quarter of 2027.
The German-Norwegian company, headquartered in Bavaria, is investing around 250 million euros in the site, according to its statements. There will be no subsidies. Eco Stor makes its money by buying and storing electricity cheaply to sell it again at higher prices. Low prices on the electricity market occur when there is a surplus of electricity, usually from renewable sources. High prices occur, for example, in the event of a lull in solar and wind power. Eco Stor has set itself the goal, according to its statements, of operating a total of 30 locations in Germany with a total capacity of 10 GWh by 2030. In June, Germany’s largest battery storage facility to date in Bollingstedt, with a capacity of 103.5 MW and 238 MWh of storage capacity, went into operation.
Large container city on a green field
Figuratively, the planned storage facility can be imagined as a kind of container city. Eco Stor plans 192 battery stations with 1536 battery cabinets and 638,976 battery cells. The operator chose Förderstedt because of an existing substation with a 110 kV grid connection. Population density also played a role. The facility is intended to maintain sufficient distance from residential areas to keep noise pollution as low as possible.
In addition to Eco Stor, several other companies are planning to build battery storage facilities in Germany. The title of the largest storage facility is therefore unlikely to remain with Eco Stor for long. By the end of 2027, EnBW plans to build a large battery storage facility with a capacity of 400 MW and 800 MWh at the site of the former nuclear power plant in Philippsburg. In Waltrop, North Rhine-Westphalia, BKW and Luxcara are planning a battery storage facility with a capacity of 900 MW and 1800 MWh for the first quarter of 2028. However, the plan for a mega-storage facility by LEAG in Boxberg, Saxony, with a storage capacity of more than 1000 MWh, is in question after the operator reportedly suspended planning indefinitely.
Internationally, there are even larger storage facilities: the Waratah Super Battery in Australia partially went into operation in August 2025 with a capacity of 350 MW and 750 MWh and is being expanded to 850 MW and 1680 MWh. The Moss Landing Energy Storage Facility in the USA with 750 MW and 3000 MWh was considered one of the world’s largest systems but was partially destroyed in a fire on January 16, 2025. The fire severely damaged the 300 MW Phase I facility, while the remaining 450 MW remained intact.
Providers advertise these advantages
The providers advertise their projects, among other things, by stating that they stabilize the power grids with the storage facilities. The storage facilities are “black start capable” and can also contribute to restoring the grid in the event of a collapse. In addition, the facilities would help stabilize electricity prices and allow for a greater input of renewable energies into the grid, as they can compensate for lulls.
(mki)
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This article was originally published in
It was translated with technical assistance and editorially reviewed before publication.
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