The Project

CAES Zuidwending

The CAES Zuidwending Project

CAES Zuidwending - Placing Groningen and The Netherlands at the forefront of the energy transition

CAES Zuidwending, the first large-scale electricity storage facility in the Netherlands located at Zuidwending in the province of Groningen, is being developed by Corre Energy Storage BV.

The project will deploy advanced compressed air energy storage (CAES) technology and aims to develop and implement the World’s first 100% renewable CAES solution for integration of renewable energy.

The project’s designation as a European Project of Common Interest confirms its status as one of Europe’s most important energy infrastructure projects.

CAES Zuidwending will have a generation capacity of approximately 320 MW and a daily storage/delivery capacity of approximately 3-4 GWh (gigawatt-hours). The project is scheduled for commissioning in 2025.

This highly innovative project will allow a new, 100% renewable large-scale energy storage technology to be replicated across Europe and worldwide.

CAES Zuidwending will place The Netherlands and the Province of Groningen at the forefront of the energy transition.

CAES Zuidwending is being developed by Corre Energy Storage BV which is part of Corre Energy

Corre Energy and Infracapital

Corre Energy is proud to announce an investment partnership with Infracapital, the infrastructure equity investment arm of M&G plc for the CAES Zuidwending project (PCI 1.17).

How CAES Works

CAES is a highly flexible large scale energy storage technology, operating reliably and safely since 1978 in Germany and 1991 in the US. The technology uses purposefully designed underground storage caverns created in geological salt deposits by a process known as solution mining or leaching.

During operation of the CAES facility, in the storage phase, electricity is used to compress air into the storage cavern. In the generation phase, the compressed air is released and heated to drive turbines, producing electricity when required.

CAES Zuidwending - a 100% renewable CAES solution

Recent turbine technology developments allow addition of up to 50% hydrogen in the fuel mix for CAES in the generation phase.

CAES Zuidwending will implement a further design step that will allow green hydrogen to fully replace methane, providing a 100% renewable-CAES solution.

Need for the project

Corre Energy Storage BV is developing CAES Zuidwending in the context of the Paris Agreement and The Netherlands Climate Act and the National Climate Agreement 2018, which set a national target for 70% renewable energy by 2030, comprising 11.5 GW of offshore wind, an additional 7 GW of onshore wind and up to 6-8 GW of solar.

Other northern European countries have acknowledged that climate change must be addressed as an emergency issue and are increasing their renewable energy targets.

Offshore wind across Northern Europe is set to reach approximately 70 GW by 2030.

Achieving these ambitious targets for renewable energy will require deployment of new, large-scale innovative storage facilities as exemplified by CAES Zuidwending.

The project will provide access to energy storage for renewable energy producers and essential services to the Transmission System Operator, TenneT, to ensure the secure operation of the electricity grid.

Project benefits

A 2016 study by Imperial College London (Electrical energy storage for mitigating climate change) ranks CAES as the energy storage technology with highest Energy Stored on Investment. Essentially, this confirms CAES as the most environmentally and economically sustainable of large-scale energy storage technologies.

During construction and operation the project will provide multiple benefits at local, national and EU-wide levels including:

  • Inward investment and employment
  • Enhanced profile for Groningen as a centre of renewable energy innovation
  • Security of electricity supply
  • Integration of renewable energy
  • Improved energy price competition
  • Reduced cost of electricity generation
  • Reduced CO2 emissions

In 2019 Navigant Research, a global energy consulting company assessed the societal benefits of electricity storage projects for the European Commission. Navigant’s results for CAES Zuidwending show

  • Substantial benefit-to-cost ratio of 3.6 to 1
  • Net value of benefits per year of up to €200 million per annum.

Project of Common Interest

Projects of common interest (PCIs) are key infrastructure projects that are intended to help the EU achieve its energy policy and climate objectives: affordable, secure and sustainable energy for all citizens, and the long-term decarbonisation of the economy in accordance with the Paris Agreement. The goal is to help countries within the EU to achieve their energy policies and climate objectives.

Corre Energy’s strive to achieve decarbonisation through the introduction of mass renewable energy, coupled with our aim to provide affordable, sustainable energy for citizens is why we have been designated as a PCI by the European Commission.

Electricity PCIs include interconnectors, transmission lines that provide cross-border benefit and large-scale electricity storage projects such as CAES Zuidwending.

CAES Zuidwending is included as project 1.17 on the 3rd list of PCIs within the North Seas Offshore Group priority corridor.

Further information on European projects of common interest can be found at 

Status of the Project

Details of the project’s progress will be updated regularly at this website.

The permitting process for PCIs is governed by the national competent authority in the relevant Member State, which for the Netherlands is the Ministry of Economic Affairs and Climate Policy (EZK).

The Ministry’s website is and its guidance for the permitting process for PCIs is available here and here (English).

The permitting process will involve a thorough program of environmental and technical assessment and will include a comprehensive public consultation process, in line with Netherlands and EU legislation.

"Energy is undoubtedly one of the most critical industries, with innovative technological advancements being absolutely vital to keep up with environmental change and industry demands."