Our H2FlexiStore underground hydrogen storage technology uses the geology of the earth to contain pressurised hydrogen gas, allowing safe, large-scale storage, close to the point of demand.

The innovative lined rock shaft (LRS) system is similar to the lined rock cavern method and uses the surrounding rock mass to support the gas pressure, minimising the amount of containment material required and maximising location flexibility.

A bespoke shaft is sunk for each case, with a range of shaft dimensions available, providing a variety of different storage capacities. A series of lining materials are installed in the shaft which contain the hydrogen within a gas tight layer, transferring the load from the internal pressure to the rock mass.

Shafts can be located where the hydrogen is needed and offer a mid-scale storage capacity of up to 100 tonnes of hydrogen per shaft, ideal for the needs of industrial hydrogen hubs.