New Energy Storage System Links Flywheels And Batteries

The article discusses a significant $200 million investment by Illinois-based Magnetar Finance into Torus Energy, a Utah startup innovating in energy storage by combining advanced flywheel technology with lithium-ion batteries. Flywheels, historically used for mechanical energy storage since ancient times, have recently been overshadowed by battery technologies but offer rapid response capabilities that complement the longer-duration energy storage of batteries. Torus Energy’s hybrid system leverages this synergy, providing fast-reacting power support alongside reliable energy duration, which has attracted interest from military clients and utility partners. Torus Energy’s “modular power plant” technology enables near-instantaneous response to grid signals, supporting frequency and voltage regulation, peak shaving, emergency backup, and power quality improvements with 99.9% uptime. The system’s ability to operate at the grid edge or on-site allows for distributed, decentralized energy management, enhancing grid resilience and enabling “islanding” capabilities—critical for large electricity users like data centers, especially in regions prone to