Our Technology Why Iron-Chromium Flow Batteries?

Redox One development process

Proven technology

  • Mature technology, developed by NASA in the 1970s
  • Proprietary Manufacturing Processes and Stack Designs make us unique among competitors
  • We own the IP, formulations, data and know-how from Deeya/Imergy and EnerVault, which both demonstrated the feasibility of Fe-Cr RFBs
  • Large numbers of small Deeya systems are still in operation at cell tower diesel backup sites
  • 1 MWh EnerVault Turlock successfully completed a 2014 US Department of Energy demonstration, proving scalability

Pioneering Sustainable Energy Solutions

Redox One’s mission is clear - to pioneer a sustainable energy future through safe, innovative, and cost-effective power storage solutions. We achieve this with our groundbreaking Fe-Cr Redox Flow Battery technology, which is revolutionising the way we harness and store energy. Our innovative technology and mine-to-machine strategy are game changers for power storage solutions.

Sustainability in Action:

Our technology embodies sustainability. It’s a crucial step towards a decarbonized world. By 2040, the globe is projected to produce 160 000 TW of energy from renewable sources. With most of these sources providing power intermittently, reliable energy storage is imperative. Redox One’s solutions offer exactly that.

Threefold Innovation:

The secret to our success lies in a threefold approach:

Economical Electrolyte: Our Fe-Cr electrolyte is not only cost-effective but also sustainable. Thanks to our strategic partnership with Tharisa plc, we have a continuous supply of raw material. This means our batteries are not just safe and reliable but also environmentally responsible.

Longevity: Our batteries are built to last. They can perform optimally for up to 20 years. This longevity is crucial for ensuring a consistent and uninterrupted power supply, helping businesses and communities stay switched on. Always.

Safety and Disposal: We use chromium (III), an inert material, which ensures our batteries are safe to operate and easy to dispose of safely. We care about the entire lifecycle of our technology, from production to disposal.

Proven Track Record:

Our technology isn’t new; it's been refined and proven over time. NASA first pioneered it in the 1970s. Since then, it has matured, refined, and amassed numerous proof points, including our own successful deployments. Our batteries are the result of decades of innovation, research, and development.

The Future of Energy Storage:

As the world shifts towards renewable energy, efficient energy storage is no longer a luxury but a necessity. Redox One is here to provide a cost-effective, safe, and scalable solution that aligns with the needs of a decarbonized world. The energy storage market is poised to explode in value, expected to reach USD3 trillion by 2040. Redox One is at the forefront of this transformative industry, powering progress for generations to come.


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