Aqueous zinc flow batteries are gaining momentum as a safe, cost-effective, and scalable solution for large-scale energy storage, particularly as the global energy sector pivots toward renewables. Innovations in this technology have significantly improved energy density, lifespan, and efficiency, making aqueous zinc flow batteries increasingly competitive with lithium-ion batteries.
According to BIS Research aqueous zinc flow batteries market is valued at $259.6 million in 2024 and is projected to expand at a CAGR of 23.60% to reach $2,159.8 million by 2034. Below, we profile 6 emerging players shaping the future of this market
Headquarters: Vancouver, Canada
Zinc8 has developed a patented zinc–air flow battery system that decouples energy and power, allowing flexible scaling for various applications. Their technology stores energy in zinc particles, which are regenerated during discharge, enabling long-duration storage with minimal degradation. The company is constructing a 20 MWh manufacturing facility in the UK to commercialize its technology.
Headquarters: Brisbane, Australia
Redflow specializes in zinc–bromine flow batteries, offering the ZBM3 battery known for its deep discharge capability and long cycle life. Their systems are designed for telecommunications, commercial, and industrial energy storage applications. Redflow's batteries operate efficiently in high-temperature environments without the need for cooling systems.
Headquarters: Hayward, California, USA
Primus Power has developed the EnergyPod, a zinc–bromine flow battery system that integrates the electrolyte tank and cell stack into a single unit, simplifying installation and reducing costs. Their technology emphasizes high power density and long service life, targeting utility and microgrid applications.
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Headquarters: Columbia Falls, Montana, USA
ViZn Energy Systems offers zinc–iron redox flow batteries designed for grid-scale energy storage. Their systems aim to provide high energy efficiency and long operational life, suitable for renewable integration and load shifting. ViZn focuses on non-toxic, low-cost materials to enhance sustainability and safety.
Headquarters: Menomonee Falls, Wisconsin, USA
EnSync developed modular zinc–bromine flow batteries tailored for commercial and industrial energy management. Their systems are designed to integrate with renewable energy sources, providing reliable backup power and peak demand reduction. EnSync emphasizes scalable solutions that can be customized to specific energy needs.
Headquarters: Edison, New Jersey, USA
Eos’s core technology, the Znyth aqueous zinc battery, powers their latest Z3 battery modules. These batteries use a proprietary water-based electrolyte held within individual cells, enabling energy storage through zinc deposition and dissolution-a process inspired by industrial zinc-plating baths. The electrolyte is doped with halides and other additives to maximize zinc solubility and prevent dendrite formation, which helps extend battery life and performance. The company is scaling up production to meet the growing demand in the U.S. energy storage market.
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These companies are contributing to the evolution of aqueous zinc flow battery technology, each bringing unique innovations to the energy storage landscape. Their advancements are pivotal in addressing the challenges of renewable energy integration and grid stability.
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