Our zinc-bromine flow battery is one of the world’s smallest, safest, scalable and most sustainable energy storage solutions. The battery offers a long-life design and a chemistry that makes use of cost effective, abundant, fire-safe, and low toxicity materials.
Redflow’s batteries are ideal for extended duration energy storage applications in a wide range of scenarios, from small commercial installations to multi-megawatt hour storage applications.
Our flow batteries are perfect for extreme conditions and can operate without any additional cooling or heating from 10 °C to 45 °C (50 °F to 113 °F).
We have designed and built batteries that offer the greatest flexibility for medium to grid-scale energy storage needs.
Designed to support your business efficiently and effectively over the longer term, the modular nature of our solutions means that they enable you to grow your energy storage capacity when you need it.
Flow batteries are a type of electrochemical energy storage, which means they use chemical components dissolved in liquid to store electrical energy.
During charging, PV panels, wind turbines or grid input deliver electrons to charge the zinc bromide electrolyte solution. In our flow battery, dissolved zinc is ‘plated out’ as metallic zinc on one electrode surface, with bromide converted to complex bromine on the other electrode. This process consumes electrons - provided via an electric charge - which stores the energy.
During discharge, the liquid electrolyte is pumped through the electrodes, reversing the process as zinc dissolves into the solution, converting complex bromine to bromide, releasing electrons to generate electricity.
Check out the video below to see how our flow battery works.
Enabling full remote monitoring and control of our energy storage systems, the Redflow BMS provides real time visibility of battery performance and connects seamlessly with our Cloud-based monitoring platform, to provide long term data analytics and system optimisation capabilities. Accessible via a web-based interface on any smart device, the BMS can interface into a range of Energy Management Systems via industry standard communications protocols.
Click here to download the Battery Management System datasheet.
Redflow’s flow batteries have many advantages compared to lithium-ion in medium to long-duration storage applications.
Redflow zinc-bromine battery
Full battery discharge to zero volts
Deep daily discharge
Shortens battery life
Negligible impact on battery life
Energy output from a full charge/discharge cycle
Declines with cycle count
Extended time in standby
Loses stored energy over time
Retains all 100 per cent its rated capacity of stored energy for weeks or months, while in standby mode
High ambient temperature
Requires active cooling to avoid life reduction
Ambient/free air cooling sufficient unless sustained ambient temperature is greater than 45 °C (113 °F)
Risk of thermal runaway
Minimal as the electrolyte is inherently non-flammable (as tested to UL9540A)
Challenging to recycle
Easy to recycle
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