The Netherlands is moving to address one of the least developed segments of the hydrogen value chain by committing €450 million ($513 million) to support large scale underground hydrogen storage, recognizing that production and transport infrastructure alone will not be sufficient to establish a functioning hydrogen market.
The Dutch cabinet has announced plans to provide the funding to state owned gas network operator Gasunie for Project HyStock, a proposed underground hydrogen storage facility in Zuidwending. The investment remains subject to approval by the House of Representatives but signals growing government recognition that storage infrastructure will require public support during the early stages of hydrogen market development.
The proposed facility would consist of four salt caverns capable of storing up to 200,000 tonnes of hydrogen. Once operational, the site would connect to the Netherlands’ planned national hydrogen network while complementing existing natural gas storage infrastructure. According to Gasunie, the first storage cavern could become operational around 2031, although the company has yet to make a final investment decision.
The project addresses a structural challenge facing hydrogen markets across Europe. While governments have announced significant investments in electrolyzers, import terminals, and transmission pipelines, storage capacity has received comparatively less attention despite its importance in balancing fluctuating production and consumption.
Hydrogen demand is expected to vary across industrial users, power generation, and transport applications, while renewable electricity used for green hydrogen production remains inherently variable. Underground storage enables excess hydrogen produced during periods of abundant renewable generation to be stored and later supplied during periods of higher demand or lower renewable output, improving system flexibility and reducing supply risks.
Salt caverns have emerged as one of the most technically mature options for large scale hydrogen storage. Their geological properties allow repeated injection and withdrawal cycles while minimizing hydrogen leakage. Several European countries, including Germany and the United Kingdom, are also evaluating or developing similar underground storage facilities as part of broader hydrogen infrastructure strategies.
The Dutch cabinet described storage as a critical component of a “well functioning hydrogen chain,” arguing that inadequate storage capacity could become a bottleneck even if production and transportation networks expand as planned.
The government’s financial support reflects the commercial realities of an industry that remains in its early stages. According to the cabinet, private investors face uncertainties that are difficult to price, including future demand for storage services, the cost of cushion gas required to maintain cavern pressure, and potential permitting delays. These risks have slowed investment despite growing political support for hydrogen deployment.
Rather than providing blanket financial protection, the proposed funding is designed to reduce market risks that could prevent projects from reaching construction. The cabinet emphasized that the investment does not shield the developer from cost overruns or normal commercial risks, leaving Gasunie responsible for successful project execution.
The selection of Zuidwending builds on existing experience with underground gas storage and established energy infrastructure. Reusing suitable geological formations and leveraging existing pipeline connections could reduce development complexity compared with entirely new sites, although hydrogen storage introduces distinct engineering and operational requirements.
The project’s estimated development timeline of ten to fifteen years illustrates the long lead times associated with strategic energy infrastructure. From geological assessment and environmental permitting to cavern construction and surface installations for hydrogen injection and withdrawal, underground storage projects require extensive planning before commercial operation can begin.
The timeline also highlights a broader challenge for European hydrogen policy. Governments have established ambitious targets for renewable hydrogen production and industrial decarbonization over the coming decade, yet critical enabling infrastructure such as storage typically requires investment decisions years before market demand fully materializes. Without early public intervention, developers may delay projects until commercial certainty improves, potentially creating infrastructure shortages that slow hydrogen deployment.
