Remora Stack is a new modular and scalable compressed air energy storage solution designed for factories, industrial zones, eco-districts, and shopping centers.
After initial trials at grid scale, compressed air energy storage is reaching into the commercial and industrial (C&I) sector. SEGULA Technologies, a global engineering group, has introduced Remora Stack, an innovative air-based storage system tailored to meet the energy demands of commercial and industrial users.
“We’ve been working on this technology and its potential applications for nearly a decade,” said David Guyomarc’h, Head of R&D at SEGULA. “The development of Remora Stack, primarily intended for industrial use, is grounded in a very hands-on approach: building a series of demonstrators to validate the solution step by step. So far, the early results have been very promising.”
The system comes in containerized standard-size modules (12 m long, 2.4 m wide, 2.5 m high) and uses isothermal compression and expansion. To understand this technological choice, it’s important to look at how compressed air energy storage (CAES) works.
In CAES systems, compressing air generates heat, while expanding it causes cooling. For optimal efficiency, these systems must effectively manage thermal energy. Unlike adiabatic or diabatic CAES, isothermal systems aim to keep a stable operating temperature by maintaining constant heat exchange with the environment. On paper, this approach offers near-perfect energy efficiency. In practice, however, thermal losses are unavoidable.
According to the company, Remora Stack currently achieves around 70% efficiency.
Storage power is defined by the size of the compressor, while capacity depends on the volume of compressed air. These two parameters can be adjusted independently. This allows users to extend storage duration simply by adding more containers—no need to upgrade the compressor. That kind of flexibility makes the solution more cost-effective, scalable, and adaptable to specific needs across manufacturing sites, industrial complexes, eco-districts, shopping malls, and public infrastructure.
“In the end, Remora Stack will be able to store energy for more than ten hours, without relying on rare earths or lithium,” Guyomarc’h added.
The C&I air storage system is now part of Air4NRG, a collaborative project funded by the European Union. Within this initiative, SEGULA is developing test structures to assess Remora Stack under real-life operating conditions. Prototypes will be used to validate performance and fine-tune the technology before scaling up to industrial production. The first full-scale pilot is planned for 2026, with initial commercial units expected by 2028–2029.
