RWE starts 236 MW / 470 MWh battery build at Germany’s Hambach mine

SolarQuarter reports that preparatory work on the three-hectare Hambach site began at the end of 2025 and the first of 128 lithium-ion battery containers has been delivered. RWE says the system will help balance wind and solar fluctuations in fractions of a second. The location is significant because Hambach already hosts about 50 MWac of solar and a smaller 4.1 MW / 8.1 MWh battery, showing how former lignite sites are being repurposed for grid flexibility.