Grid-scale

RWE plans 1.2 GWh battery on German former coal plant

The energy company says it is investing a mid-three-digit million euro amount into construction of the 600 MW battery energy storage system (BESS).

By

Sandra Enkhardt

Mar 17, 2025

German energy company RWE is building a 600 MW/1.2 GWh BESS on the site of the former Westfalen coal-fired power plant in Hamm, North Rhine-Westphalia.

The utility on Friday said the plant would cost a “mid-three-digit million euro” figure.

RWE had already installed a 140 MW/151 MWh battery at the site in February.

The new, larger BESS will feature three battery fields across six hectares that will host more than 25,000 lithium ferro-phosphate batteries in 316 shipping containers. Site commissioning is planned between 2026 and 2028.

The new BESS will be able to provide grid reserve power within milliseconds, thanks to “superfast inverters.” The rapid response time means the BESS will be able to provide the type of instantaneous reserve power currently supplied by rotating turbines in conventional power plants.

From pv magazine Deutschland.

Written by

Sandra Enkhardt
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