Who makes the battery for the largest energy storage power station in Western Europe

Will Germany become Europe's largest battery storage system?

Germany is about to become home to Europe’s largest battery storage system – a massive 1 gigawatt (GW) / 4 gigawatt-hour (GWh) project in Jänschwalde, Brandenburg. LEAG Clean Power GmbH and Fluence Energy GmbH, a subsidiary of US-based Fluence Energy (NASDAQ: FLNC), are teaming up to build the “GigaBattery Jänschwalde 1000.”

What is Europe's largest battery energy storage system?

While these projects boast massive planned capacities, the largest active BESS in Europe is now the first 400 MWh phase of ENGIE’s 200 MW / 800 MWh system in Vilvoorde, Belgium, which has officially gone live. Sungrow and ENGIE bring Europe’s largest battery energy storage system online in Belgium with the completion of its first 400 MWh phase.

Which battery energy storage system projects are backed by a reputable developer?

As of mid–late 2025, four utility-scale Battery Energy Storage System (BESS) projects stand out by size — each designed in the 0.5–2.8 GWh class and backed by reputable developers and public filings. Below I summarise each project, its capacity, status and why it matters. 1. Green Turtle (Rotem/Dilsen-Stokkem, Limburg — Belgium)

Why are battery storage systems important?

Battery storage systems are an essential component of the energy transition because they store energy during an overproduction of electricity in the grid and then release it again when it is needed.