June 15, 2023: ESS today announced plans to build a 50 MW/500 MWh iron flow battery system in eastern Germany in partnership with domestic energy firm LEAG.
The flow battery system at the Boxberg Power Plant site is to be commissioned in 2027, following definitive agreements and financial close for the project, which are expected in the third quarter of this year.
ESS said the 50MW battery module is set to become a standardized building block in LEAG’s plan to deploy 2GWh-3GWh of long duration energy storage.
LEAG and partners plan to invest €200 million ($217 million) and say additional investments are expected as plans progress.
LEAG is a major operator of large-scale lignite mining and coal-fired generation in eastern Germany and wants to transform the coal-dependent region.
The firm plans to develop 7GW-14GW of renewable generation paired with 2GWh-3GWh of energy storage and 2GW of green hydrogen production.
Wind and solar generating infrastructure is already being developed at Boxberg.
EMEA director of ESS Alan Greenshields told Energy Storage Journal the power module for Boxberg will be built at the company’s Oregon plant in the US — but there are “ongoing discussions about the right point in time” to also have the firm’s batteries assembled in Europe.