As renewable energy deployment continues to expand worldwide, the need for long-duration energy storage capable of balancing intermittent solar and wind generation has become increasingly important. Invinity is addressing this challenge through its vanadium flow battery (VFB) technology, designed to deliver safe, long-life, utility-grade energy storage for grid-scale, commercial, and industrial applications. Unlike conventional lithium-ion batteries, Invinity’s systems store energy using a non-flammable, water-based vanadium electrolyte that does not degrade through repeated cycling, making the technology well suited for frequent charge and discharge operations.
At the core of the technology is a modular vanadium redox flow battery architecture in which energy is stored within external electrolyte tanks and circulated through electrochemical cell stacks during charging and discharging. This design decouples energy capacity from power output, allowing storage duration to be increased simply by expanding electrolyte storage while maintaining the required power rating. The stable vanadium chemistry also enables 100% depth of discharge without compromising battery life, offering operational flexibility for renewable energy integration and grid support.
A key technical advantage of Invinity’s platform is its durability. According to the company, its vanadium flow batteries deliver more than 20,000 deep discharge cycles without the degradation typically associated with lithium-ion technologies. The systems are designed for an asset lifetime exceeding 30 years with unlimited lifetime cycling, eliminating the need for battery augmentation while supporting continuous daily operation. Over their operational life, Invinity states that a single vanadium flow battery can deliver three times the lifetime energy throughput of a comparably sized lithium battery, helping reduce the levelized cost of stored energy.
The company's product portfolio is led by the Endurium™ platform, optimized for utility-scale energy storage projects ranging from 3–100+ MW and 12–500+ MWh, with configurable discharge durations between 4 and 18 hours. For commercial and industrial applications, Endurium Enterprise™ supports projects from 1–20 MW and 4–80 MWh, while the proven VS3 platform serves grid and business applications ranging from 2–40 MWh. The factory-built systems are delivered ready for installation, feature stackable modular units for increased energy density, and can be scaled to match project-specific storage requirements.
Beyond energy storage capacity, Invinity emphasizes operational safety and deployment flexibility. The water-based vanadium electrolyte is inherently non-flammable, significantly reducing fire risks compared with conventional battery chemistries. The technology is designed for applications including renewable energy time-shifting, grid balancing, ancillary grid services, microgrids, and behind-the-meter energy management, enabling operators to maximize renewable energy utilization while improving grid resilience and reliability.
By combining non-degrading vanadium flow chemistry, modular scalability, long operational life, deep discharge capability, and utility-scale deployment flexibility, Invinity's vanadium flow battery technology is positioned to support the growing demand for long-duration energy storage as power systems transition toward higher shares of renewable energy generation.
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About Invinity
Invinity Energy Systems is a developer and manufacturer of utility-grade vanadium flow battery energy storage systems for renewable energy, commercial, industrial, and grid-scale applications. With operations across the UK, Canada, the United States, and other international markets, the company focuses on delivering long-duration energy storage solutions that offer high safety, scalability, and long operational lifetimes. Its portfolio includes the Endurium™, Endurium Enterprise™, and VS3 platforms, designed to support renewable energy integration, grid stabilisation, and large-scale energy storage projects through modular vanadium redox flow battery technology.
