- EnBW will build a 400 MW / 800 MWh battery storage plant in Philippsburg, Germany, to support renewable energy and supply power to 100,000 homes daily.
- TransnetBW will connect the privately funded project to the grid by mid-2027, enhancing flexibility in Germany’s energy system.
Germany’s EnBW and transmission system operator TransnetBW have unveiled plans to construct one of the country’s largest battery energy storage systems at the site of a former nuclear converter station in Philippsburg, southwest Germany.
The facility, designed with an output of 400 megawatts and a storage capacity of 800 megawatt-hours, will store renewable electricity, primarily from sources such as offshore wind, and supply enough energy to meet the daily needs of around 100,000 households.
Furthermore, EnBW presented the project to the Philippsburg municipal council. The aim is to commission the battery plant by mid-2027. The project will proceed without government subsidies.
“In the future energy system, large-scale battery storage systems will play a crucial role in balancing weather-dependent renewable generation with real-time electricity demand from homes, businesses, and industry,” said Peter Heydecker, EnBW board member for sustainable generation infrastructure.
In addition, Heydecker mentioned that battery systems, in combination with hydrogen-ready gas power plants, would provide the flexibility required for grid stability.
TransnetBW, which operates the converter station already located on the site, will provide the grid connection and ensure the infrastructure can handle the battery system’s charging and discharging.
Meanwhile, Philippsburg Mayor Stefan Martus welcomed the project, calling it a continuation of the town’s legacy as a major energy hub. “Philippsburg has served as one of Germany’s key energy locations for over 50 years,” he said. “Now, it will continue that legacy as a central storage site for sustainable energy.”