Projects & Applications

RWE starts installing 236 MW/470 MWh battery storage project in Germany

RWE has begun buidling a 236 MW/470 MWh battery energy storage system (BESS) at a mine in western Germany. The project is scheduled to enter service in 2027 and will provide ancillary services including frequency regulation, with future capability to deliver synthetic inertia.

By

Ralph Diermann

Jul 29, 2026

RWE has begun installing a utility-scale BESS at its Hambach lignite mine in Germany’s Rhineland region as the company continues repurposing the site ahead of the planned phaseout of coal mining.

The project, located near the municipality of Niederzier, North Rhine-Westphalia, will have an output of 236 MW and an energy storage capacity of 470 MWh. Construction is underway, with RWE set to install 128 lithium-ion battery containers. The first containers have now been delivered following site preparation that began in late 2025.

RWE expects the battery storage system to enter commercial operation in 2027.

The company said the system will provide ancillary services, including frequency regulation. It has also been designed to deliver additional grid-support services in the future, including synthetic inertia.

RWE is currently developing around 1.7 GW of battery storage capacity across Germany.

At the Hambach mine, RWE has already commissioned three solar parks with a combined capacity of about 50 MW, along with a 4.1 MW / 8.1 MWh battery energy storage system. The company is also building a nearby 14.8 MW solar park and an additional battery storage project with an energy capacity of 80 MWh.

From pv magazine Deutschland

More about

Written by

Ralph Diermann
View author posts

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.

Industry

Why India’s C&I sector is slow to embrace battery storage Battery storage economics vary considerably from one facility to another in India, unlike rooftop solar, where payback periods of three to five years are well understood.

Rahul Das, AVP – Business Development, Oorjan Cleantech

Jul 13, 2026

Flow batteries

Energy security push highlights need for long-duration storage Energy storage is essential to ensuring grid stability as demand grows for intermittent renewables, like solar PV. Different options are gaining traction, supported by international standards.

Adrian Pennington

Jun 09, 2026

Policy

EU approves 45 GW energy storage target in bid to reduce gas exposure Tripartite agreement puts new energy storage obligations on 22 member states, while renewable and energy storage developers commit to robust deployment pipeline, and multinational investors prepare to assign more capital to segment. More funds for EU manufacturing anticipated plus significant C&I segment expansion.

Jun 29, 2026

Policy

Global Battery Alliance launches Battery Passport pilots The Global Battery Alliance (GBA) has just launched the second wave of its Battery Passport pilots, which includes 11 pilot consortia. This second wave will establish the Minimum Viable Product of the GBA Battery Passport with a product-level ESG (Environment, Social, Governance) score.

Jun 21, 2024

Opinion & Analysis

Germany adds 6.57 GWh of battery storage capacity in 2025, total capacity hits 24 GWh The expansion of stationary battery storage in Germany reached an estimated 6.57 GWh in 2025, representing an 8% increase compared with the previous year. Total installed battery storage capacity in Germany now stands at around 24 GWh, according to analyses by the Battery Charts data platform of the Institute for Power Electronics and Electrical Drives (ISEA) at RWTH Aachen University.

Jonas Brucksch, Jan Figgener, Christopher Hecht, Dirk Uwe Sauer

Jan 09, 2026

Industry

Energy storage in 2025: Year in review In another record-breaking year for energy storage installations, the sector has firmly cemented its position in the global electricity market and reached new heights. From price swings and relentless technological advancements to shifting policy headwinds and tailwinds, 2025 proved to be anything but uneventful.

Dec 19, 2025

This website uses cookies to anonymously count visitor numbers. View our privacy policy.