RWE has taken the final investment decision to build a 400 megawatt/1,100 megawatt-hour battery storage system at its Moerdijk power station in the Netherlands, with commissioning planned for the second quarter of 2028, the company said in a Monday statement.
The project will comprise 208 lithium-ion battery containers and can deliver its full output for almost three hours. RWE said the system could supply enough electricity to meet evening peak demand from about 500,000 households, while also absorbing surplus power from the grid within seconds.
The battery is to connect to the national grid through the existing substation at the Moerdijk power plant. Under capacity steering agreements with transmission system operator TenneT, it will be dispatched to help relieve electricity grid congestion in Noord-Brabant and could free up capacity for customers waiting to connect.
TenneT and regional grid operator Enexis will assess the project's impact as part of ongoing congestion management planning.
The system is also to provide grid services, including instantaneous reserve and inertia. It is intended to support RWE and TotalEnergies' (TTE) 795 MW OranjeWind offshore wind project by storing electricity during periods of high wind generation and feeding it back into the system when demand rises, alongside other flexibility technologies such as electrolysis, e-boilers and smart charging.