Specializes in long-duration energy storage systems for the modern grid, providing grid-scale capacity through its Advanced Compressed Air Energy Storage (A-CAES) technology. This innovative approach utilizes a simple combination of air, water, and underground caverns to store off-peak or surplus electricity in an efficient, closed-loop system. A-CAES projects are designed to be 500 MW, capable of providing 8 or more hours of back-up power, with facilities ensuring a 50+ year lifetime.

The technology offers reliable, emissions-free performance, flexible siting using purpose-built hard rock caverns, and essential grid services such as rotational inertia, voltage support, and frequency response. Hydrostor's systems are cost-effective, scalable, and adaptable to match specific grid requirements, while also creating significant economic benefits through high-quality job creation and boosting local industry. The company operates with over 130 employees across 4 offices in 3 countries, managing a pipeline of 15+ projects globally.