Technology

At Gravitricity we are developing a portfolio of technologies which utilise the unique characteristics of underground spaces for large-scale energy storage.

Gravity Storage

Our GraviStore underground gravity storage technology uses the power of gravity to offer some of the best characteristics of lithium batteries and pumped hydro storage.

Ideally suited to network-constrained users and operators, distribution networks and major power users, our technology operates in the 1MW to 20 MW power range and enables existing grid infrastructure to go further in a renewable energy world.

Key features:

With no cycle limit or degradation

Zero to full power in less than a second

Can run fast to deliver high power, or more slowly for longer duration

Levelised costs well below lithium-ion batteries

Underground gravity storage diagram

These special characteristics mean Gravitricity’s gravity energy storage is ideally suited to the following use cases:

  1. Grid services. Delivering power to distribution and transmission network operators (DNOs and TSOs) for grid balancing and frequency regulation, allowing them to ensure quality and security of supply with a technology designed to last for decades.
  2. Co-location. By coupling gravity storage with large scale renewable generation at the same site, solar farm owners and operators can time-shift solar supply to high price peak periods, reduce connection costs and stack revenue streams.
  3. Industrial decarbonisation. On-site energy storage can support industries including mining, oil and gas and data centres to decarbonise their operations through reducing grid demand, increasing the resilience and reliability of supply, and delivering ancillary service income.
  4. Energy access. Gravity storage can be designed into mini grids allowing utilities and mini grid developers to reduce infrastructure spend and deliver better energy access to rural and off grid communities, especially during non-daylight hours.

Hydrogen Storage 

Our H2 FlexiStore underground hydrogen storage technology uses the geology of the earth to safely store large volumes of green hydrogen. Purpose-built shafts can be built wherever required to offer long-term storage close to the point of demand.

Storing hydrogen in underground shafts is intrinsically safer and less obtrusive than above-ground options and, unlike salt caverns, is not restricted to deployment in areas with particular geologies.

Key features:

Safe

Storing hydrogen underground reduces the risk of leaks and protects storage container from damage

flexibile capacity

We can store up to 100 tonnes of compressed hydrogen per shaft, with option to have multiple shafts on one site

Lower costs

Surrounding geology helps contain pressure and reduces storage costs

Location flexibility

No need for specific geological conditions, can store hydrogen where it is needed

Underground hydrogen storage diagram

Gravitricity’s H2 FlexiStore technology is ideally placed to meet the growing demand for green hydrogen in the following use cases:  

  1. Existing uses. Hydrogen production by electrolysis will replace existing carbon emitting production techniques for applications such as ammonia and methanol production.
  2. High grade heat. Hydrogen is the only low carbon way of reaching temperatures needed in numerous industrial processes, including steel making.
  3. Grid scale energy storage. Electrolysis of water can generate hydrogen from otherwise curtailed renewable generation, providing GW scale storage for daily peaks, long duration and inter-seasonal requirements.
  4. Shipping and aviation. The growing requirements of shipping and aviation will drive the growth of green hydrogen production and the need for storage facilities at ports and airports.