Distinctive & Superior Characteristics For

today’s most difficult energy challenges


A-CAES facility characteristics and benefits relative to other commercially available storage technologies make it particularly well-suited to address todays most difficult energy challenges, and the growing need for long-duration energy storage.

Low Cost,
Long Life

Lowest installed cost per kWh for large-scale, long-duration energy storage (100+ MW)

50+ year system life, with no replacements required and nearly unlimited cycling

Low operating costs, and increased efficiency over traditional CAES systems

Ability to Site
Where Needed

Proprietary purpose-built air caverns allow for flexible project siting

No toxic material, contaminants, or thermal impacts on environment; suitable for urban settings

Proven, Reliable

Well-proven mechanical equipment from Tier 1 OEM suppliers is matched with seasoned EPC engineering expertise, system warranty and delivery guarantees

System Design

System design optimized to match client requirements, with independent settings for charge, discharge and storage capacity

Long-duration of storage enables wide-scale provision of grid capacity


Synchronous motors and generators provide rotational inertia in support of electrical grid stability

Full suite of ancillary services available including voltage support, spinning reserve, black start and frequency response


Adiabatic thermal storage system uses no fossil fuels and results in no emissions


Our facilities are designed in cooperation with customers to best address all aspects of their long duration energy needs. Through independent charge, discharge, and duration ratings, A-CAES delivers distinctive and superior characteristics for a variety of applications. 

Fossil Plant & Mine Repurposing

A-CAES serves as an alternative to new thermal peaking capacity by providing identical synchronous generation for reliability, without emissions. The technology also has the ability to repurpose decommissioned thermal plants by leveraging the existing interconnection and infrastructure.

Renewable Integration

A-CAES can help maintain system reliability as the penetration of intermittent generation, like wind and solar, increases and as thermal generation is retired. A-CAES can provide dispatchable or baseloaded renewables and can optimize large solar/wind project economics through time-shifting to reduce curtailment.

Transmission Deferral

A-CAES serves as a non-wires alternative to defer grid network investment, alleviating grid congestion during peak periods and providing locatable, reliable power for critical areas and infrastructure.

Mines & Large Industrial

In addition to repurposing legacy mining infrastructure, A-CAES can improve reliability and reduce grid charges for grid-connected operations, and reduce or eliminate fuel costs and logistics for off-grid operations.

See what A-CAES offers

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