Uniper and NGEN break ground on 50 MW (100 MWh) battery in Wilhelmshaven

9 April 2026

Key highlights

50 MW (100 MWh) grid-connected battery to be built on the former Uniper coal-fired power plant site in Wilhelmshaven
Project developed by Uniper and NGEN
System will balance short-term wind and solar fluctuations to enhance grid stability, with commissioning planned for Q4 2026

Project overview

Uniper and NGEN held a groundbreaking on April 9 for a 50 MW (100 MWh) grid-connected battery energy storage system on the site of Uniper’s former coal-fired power plant in Wilhelmshaven.

Purpose and function

The BESS is designed to balance short-term fluctuations from wind and solar generation, enhancing grid stability and supporting the integration of renewable energy.

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Timeline and location

Construction is underway at the Wilhelmshaven site with planned commissioning in Q4 2026.

Stakeholders and public engagement

The ceremony included senior representatives from Uniper and NGEN and local officials; Uniper provides a digital engagement platform for citizens to follow project progress and ask questions.