OUR technology

We develop highly efficient advanced compressed air energy storage (ACAES) systems. ACAES systems are large, mechanical batteries that:

Our deep understanding of subsurface geology and reservoir engineering affords us creative and proprietary insights in the design and deployment of next-generation ACAES systems that maximize the natural characteristics of local geology.
Compressed Air Energy Storage Diagram

How it works

Excess emissions-free power from the grid is used to power an electric motor that compresses air from the atmosphere, and we store the compressed air in an underground reservoir. That air is released when electricity is needed to power a turbine, which runs a generator and returns clean electricity to the grid.

ACAES uses existing geography so we don’t have to disturb the land or build massive containers. ACAES can scale storage duration and maintain the same power capacity at zero incremental cost due to the nature of certain geologic formations that could serve as the storage medium. Because the storage medium we are using is free and abundant air, we can simply pump in more air when we need to increase storage capacity, which doesn't have any marginal incremental cost. We can also safely and cheaply release the air to discharge the compressed air energy battery since it doesn't have harmful gases that need to be contained.

Compressed Air Energy Storage Diagram

Key Benefits

Our North Star metric at TerraStor is to enable the renewable energy transition by developing technology for low-cost grid-scale storage. Advanced compressed air energy storage (ACAES) is a proven technology that provides grid-scale storage while delivering ancillary services to enable a stable grid when there is high renewables penetration. ACAES can be deployed at scale to complement the ongoing rapid buildout of renewable energy capacity.

Our technology and proprietary systems improve the roundtrip efficiency of ACAES, and our goal is for ACAES to provide the most economical method of grid-scale energy storage globally.

Wind turbines

Enables renewables

Each system supports hundreds of megawatts of renewable energy and grid stability services to enable 100% renewable energy adoption

Power Plant at Roosevelt Island, New York, NY, USA

replaces peaker plants

Each MWh of energy stored eliminates half a ton of CO2 emissions from the electrical grid

Green fields

small land and resource impact

Facilities have small surface footprint (ft2 / MWh) and can be sited on brownfield oil and gas locations