Project Spotlight

Ruien Energy Storage

25 MW / 100 MWh
Reliable reserve power & improved grid reliability

Wärtsilä's sophisticated energy storage project in Kluisbergen, Belgium

Providing flexibility for the Belgian grid

Maintaining energy frequency and reliability

The Ruien Energy Storage project is Wärtsilä’s first in Belgium and one of the largest systems in the country to-date. The 25 MW / 100 MWh energy storage system helps the customer to regulate fluctuations and supply peak power with stored renewable energy in the grid. With improved reliability, the system will also improve revenues.

The facility will utilise Wärtsilä’s GridSolv Quantum energy storage system and Wärtsilä’s sophisticated energy management software, the GEMS Digital Energy Platform.

Ruien Energy Storage is primarily designed and owned by Nippon Koei Energy Europe B.V. and Aquila Clean Energy, who developed the joint venture project.

Main Data

Customer Nippon Koei Energy Europe B.V. & Aquila Clean Energy
Site size 25 MW / 100 MWh
Site locations Kluisbergen, Belgium
Applications Renewables+
Scope of services Engineering Equipment Delivery (EEQ), Service+ GAP
Delivery 2022
Wärtsilä's GridSolv Quantum energy storage systems providing grid flexibility in Kluisbergen, Belgium

This project is notable for Wärtsilä as our first project in Belgium, and another important milestone on adding state-of-the-art flexibility to the power system. We see a major opportunity and paramount need to increase deployment of energy storage in Europe, allowing to harness the full benefit of intermittent renewable energy across the continent.

Wärtsilä's GridSolv Quantum energy storage system on site in Belgium

Reliable and optimised electricity supply

The Ruien Energy Storage battery includes hardware and software technology, driving smart asset management. The GEMS Digital Energy Platform will ensure optimal performance for the energy supply across a range of specified use-cases, including reserve power, frequency control response, capacity dispatch, and voltage support.

The system also has comprehensive system maintenance with performance guarantees across 15 years with Wärtsilä’s Service+ GAP solution.


Wärtsilä's Solution


Facilitate the Belgian federal government’s goal to phase out most nuclear generation by 2025

Wärtsilä’s GEMS Digital Energy Platform ensures optimal performance for a range of specified use cases to maintain reliability of the electricity supply

Improved grid reliability and reserve power

Maintain energy frequency and reliability

Wärtsilä’s GridSolv Quantum energy storage system provides modular flexibility and enhanced safety features

Optimised renewable energy generation

Regulate grid fluctuations for good interconnection and demand

Wärtsilä’s Service+ GAP solution provides system maintenance with performance guarantees

Improved revenues