Hydrogen is an important source of green energy because it has a high energy density, low capital costs and can be easily transported using the existing energy network. To store the green energy for peak demands, hydrogen is filled into caverns in deep layers of the earth. European energy infrastructure company Bilfinger is supporting with the engineering of an underground hydrogen storage facility near Zuidwending in the Netherlands. This new green hydrogen storage facility will store green energy from sources such as wind parks or photovoltaic installations that is available in the short and long-term and will offset any future imbalance in supply and demand of green hydrogen. Bilfinger will deliver the Basic Engineering for the entire plant, including equipment, piping, pipelines, buildings, infrastructure etc. The facility will inject the green hydrogen into caverns into deep underground salt layers.Bilfinger will provide the basic engineering for the above-ground installation. This will give Gasunie a precise picture of the storage facility with all technical, safety and environmental requirements. Bilfinger and Gasunie have been working together for many years and are benefitting from the knowledge and experience gained from former natural gas storage facilities.The compressor stations will inject around 76 million cubic meters of hydrogen gas into each of the four planned caverns. The aim is to establish a total storage capacity of approximately 26 million kg of hydrogen. The large-scale hydrogen storage site is a completely new approach and will be managed by a multidisciplinary team at Bilfinger with extensive technical knowledge and experience. The installation and first hydrogen cavern is scheduled to be operational by 2026 and will be an important part of the hydrogen infrastructure in the Netherlands.