BMS – Battery Management System

Redflow's Battery Management System (BMS) creates 'smart batteries'

The key to Redflow’s “smart batteries” is the Redflow Battery Management System (BMS) which:

  • Simplifies Redflow battery deployment and configuration
  • Remotely monitors and manages Redflow batteries
  • Ensures Redflow batteries always contain the latest software updates.

Control via a web browser

The BMS is a small DIN Rail-mounted device that connects one or more Redflow batteries with the inverter-charger that your installer provides for your energy storage system. The BMS lets you set up, monitor, and control your Redflow battery using a web browser. It also provides battery status and operational information to your AC inverter-charger so that it can optimise its use of the electrical energy stored in your battery.

Embedded know-how

The Redflow BMS is a device that embeds more than a decade of know-how in the efficient and effective real-world operation of Redflow’s unique zinc-bromine flow battery. The BMS enables rapid on-site commissioning using just a smartphone or laptop. The BMS also provides secure remote access via any Internet path, using its built-in Ethernet or WiFi ports, to the Redflow battery management cloud service.

Cloud-enabled remote monitoring and management

The Redflow BMS leverages modern cloud infrastructure to enable easy and effective remote access to installations of Redflow’s zinc-bromine flow batteries. The BMS supports remote system performance monitoring, alarm monitoring, diagnostics, performance optimisation and software updates. The BMS also gives integrators a “fleet-wide” view of their customer sites and enables Redflow to cooperatively optimise sites with integrators.

Real-time display and system control

The Redflow BMS ‘knows’ how to efficiently run ZBM2 and ZCell batteries including:

  • Seamlessly managing battery maintenance cycles
  • Optimising energy efficiency by sequencing batteries in charge and discharge to suit the application requirements
  • Real-time status display and system control
  • Continuous logging performance data to the secure Redflow cloud, and
  • Remote battery fault detection and management.

Industry standard

The Redflow BMS uses industry-standard protocols to interface ZCell or ZBM2 clusters to energy storage systems. The primary protocols supported for energy system interfaces are CANBus BMS protocols, MODBUS-TCP, and URL-based data retrieval using JSON or plain text.


  • Isolated Power Supply input (9-65V DC)
  • Ethernet and WiFi Internet access ports
  • Opto-Isolated CANBus port for energy system interfacing
  • RS485 MODBUS port for ZCell/ZBM2 connection
  • Dry-contact relay for external device control using built-in event-based rules engine
  • Also supports external device control via MODBUS-TCP write commands and using USB-attached relays, and
  • USB ports for future expansion.

More about the Redflow BMS (Battery Management System)

Frequently Asked Questions about the BMS         Click here to read the Redflow BMS FAQ

ZCell – residential

ZCell is the unique zinc-bromine flow battery designed for your home or office.

Australian-designed. Battery redefined

The Australian-designed ZCell is an energy storage system built around Redflow’s unique zinc-bromine flow battery, which redefines your understanding of how a battery works.

Use 100% daily. In a fraction of the space

ZCell is a scalable 10 kilowatt-hour (kWh) zinc-bromine flow battery that can deliver 100 per cent depth of discharge each day for its warranted 10 years. ZCell comes in an attractive, outdoor enclosure.

Use your solar. Lower your bills

A ZCell-based energy storage system cuts your power costs by letting you use your solar energy when you need it, rather than selling excess solar power to the grid cheap and buying it back high.

Energy independence. Go off grid

ZCell provides the perfect energy storage solution for remote properties. Rather than pay a high price to join the power grid, buy a robust ZCell-based energy system integrated with solar panels for a fraction of that cost. Use your own stored solar-generated energy and pay no power bills – ever!

Power on. Through blackouts

ZCell gives you energy independence and keeps your lights on during grid blackouts. A ZCell energy storage system can keep your business running when your competitors are paralysed by power cuts.

10 kWh capacity. From Day One to Year 10

ZCell delivers 10 kWh of sustained energy storage every day, fully backed by Redflow’s 10-year warranty. ZCell’s zinc-bromine flow battery means no loss of storage capacity – for a decade!

Environmentally friendly. Fully recyclable

The ZCell zinc-bromine flow battery is made from easily recycled or reused components. At its end of life, the battery’s zinc bromide electrolyte solution can be purified and used for new batteries. ZCell also helps to reduce carbon emissions. “With Redflow ZCell batteries and Tindo Solar panels, we can seriously reduce our carbon emissions,” said Craig Wilkins, CEO of Conservation SA.

Safe energy storage. For your home or office

Redflow’s zinc-bromine flow batteries are intrinsically safe devices. These temperature-tolerant zinc-bromine flow batteries contain an inherently non-flammable electrolyte solution, with a design that means there’s no chance of ‘thermal runaway’ – unlike legacy batteries. “ZCell can cope with a high heat environment, which is not true of a lot of batteries,” said Google Engineering Director ANZ Alan Noble, an early ZCell customer.

Redflow. Redefines the battery

Redflow’s ZCell zinc-bromine flow battery redefines your understanding of how a battery works. With 100 per cent depth of discharge daily, the ZCell delivers a sustained 10kWh of energy storage capacity throughout its operating life.

More resources

Document nameDescriptionIssue date
Case study: Jeff Knowles Altree-WilliamsCanberra house models hybrid grid with Redflow (Jerrabomberra, NSW)September 2018
Case study: John Altree-WilliamsZCell storage system cuts home power bill by 80% (Adelaide, SA)June 2018
Case study: Scott HicksZCell eliminates power costs for holiday house (Mannum, SA)May 2018
Case study: Bates familyQueensland home sets Redflow residential recordOctober 2017
Case study: Adrian ShandVictorian couple lives off-grid dream with RedflowOctober 2017
Case study: Alan NobleAlan Noble fires up ZCell for bushfire defences (Willunga, South Australia)October 2016
Case study: Conservation SAConservation SA showcases ZCell (Adelaide, South Australia)October 2016
ZCell WarrantyZCell Product Warranty Terms and ConditionsJanuary 2017
ZBM2 White PaperUnderstanding the Redflow batteryOctober 2018
ZCell FAQAnswers to frequently-asked questions about Redflow batteriesOctober 2017
ZCell installersA list of trained ZCell installers throughout Australia
ZCell websiteA dedicated website about ZCell, the unique flow battery system designed for your home or office in Australia.


ZCell powers ahead and cuts energy costs

Redflow’s ZCell residential battery enables homes and small businesses to self-consume their own solar energy, reduce energy costs and keep the lights on during power blackouts.

Australia is the ideal place for energy storage in the home or business, with high energy costs, widespread solar panel deployment and rapidly disappearing government solar feed-in tariffs. Rather than selling your solar power to the grid cheap and buying it back at a higher price, ZCell batteries let you store your own solar energy for when you need it. ZCell gives you greater energy independence and keeps your lights on when grid power blacks out.

Simon Hackett explains how the coming energy storage revolution disrupts the power system CLICK TO WATCH:

For home-based offices and small businesses, a ZCell energy storage system can keep your business running when your competitors are paralysed by power cuts.

If you’re building a new house on the urban fringe or turning your beachside weekender into your dream retirement home, ZCell can provide you with the perfect energy storage solution. Rather than paying more than $100,000 to connect a remote property to the grid – and facing a future filled with increasingly expensive electricity invoices – you can install a robust ZCell battery system with solar panels for a fraction of that cost and harvest your own stored solar-generated energy, with no power bills – ever!

As well as helping your hip pocket, ZCell energy storage also reduces carbon emissions, laying the path to a cleaner, more sustainable future. ZCell is built from easily recyclable or reusable materials, so there are no toxic leftovers at the end of its working life – and, with a 10-year Redflow warranty, that is a long way off!

What makes ZCell unique in a world of lead-acid and lithium-based batteries is that it experiences no loss of energy storage capacity over time. So, in 10 years’ time, your ZCell will store 10 kilowatt hours (kWh) of energy – just as it did on the day you bought it.

ZCell is intrinsically safe for homes and offices, with its electrolyte made from bromine, an inherently non-flammable material. Deployed and configured by an approved installer, ZCell is a set-and-forget solution, although Redflow’s web-based Battery Management System (BMS) automatically records performance details which you can view from your computer or smartphone. Redflow battery benefits include:

  • ZCell is the world’s smallest zinc-bromine flow battery, designed in Australia
  • ZCell reduces your electricity costs by storing your solar energy for when you need it
  • ZCell batteries deliver 100% depth of discharge daily
  • ZCell has a warranty for 10 years or 36,500 kwh throughput, whichever comes first
  • ZCell can be stored at any state of charge – from empty to full – for months or years
  • ZCell’s ‘virtual genset’ mode loses no power over time and starts in 30 seconds
  • ZCell’s inherently non-flammable electrolyte means it has low risk of thermal runaway
  • ZCell can power fire defence systems on high bushfire-risk days, when the grid sheds power
  • ZCell comes in an attractive on-ground outdoor enclosure for easy installation
  • ZCell has a smart, self-protecting, Internet-enabled Battery Management System (BMS)
  • ZCell is made from easily reusable and recyclable materials.
  • ZCell stores 10kWh of energy with no storage capacity loss over 10 years. Please contact Redflow for further details on this option.

ZCell is sold nationally through approved ZCell installers. To learn more about ZCell, visit or contact a ZCell approved installer for a quote.

Redflow residential energy storage: More resources

Customer case study:  Alan Noble fires up ZCell for bushfire defences

Customer case study: Conservation SA showcases ZCell

Customer case study: Hackett house powers through state-wide blackout

ZCell approved installers:

ZBM2 system integrators

Redflow’s unique ZBM2 zinc-bromine flow batteries are designed for stationary energy storage applications for industrial, commercial, telecommunications and grid-scale deployment.  ZBM2 batteries are sold, installed and maintained by an international network of system integrators

ZBM2 system integrators

System integratorProductRegion/sC&ITelcoGridResidential
Blue Sky EnergyZBM2AustriaX
CellnexxZBM2United Kingdom,
Green StealthZBM2Kuwait, Jordan, LebanonXX
Hitech SolutionsZBM2New Zealand, Australia, Fiji, Pacific IslandsXX
Jaladri Prima IntertradeZBM2IndonesiaXX
SMS Global Technologies Inc.ZBM2PhilippinesX
Specialized Solar SystemsZBM2South Africa and southern AfricaXXX
TSUS Excellent Engineering CoZBM2ThailandXX
VertivZBM2Australia, New ZealandXX


ZCell installers

ZCell is a unique Australian-designed energy storage system built around Redflow’s 10 kilowatt-hour (kWh) ZBM2 zinc-bromine flow battery. ZCell is available for purchase and installation only in Australia.

ZCell installers

APEX CommunicationsZCellX
Carbon Friendly EnterprisesZCellX
Country Solar NTZCellXX
Off-Grid Energy AustraliaZCellXX
Safety Smart ElectricalZCellXX
Solar DepotZCellXX

For more details about Redflow’s approved ZCell installers, visit

Simon Hackett shows his home ZBM2 energy system

CCGX Solar Generation Example
Redflow Executive Chairman and CEO Simon Hackett reports that his ZBM2-based energy storage system works very well indeed – and flawlessly from the standpoint of his family, who see a house that ‘just works’ – even when the grid doesn’t. “We all appreciate seeing the house operating well into most evenings on time-shifted solar energy harvested during the day,” writes in a blog published at

TSUS Excellent Engineering Co


In October 2016 Redflow appointed TEE as a system integrator based in Thailand. TEE has been an affiliate of TSUS GROUP (TSUS Excellent Engineering Company Ltd) since 2001. The organisation is both an EPC and distributor of energy systems. TEE was established by a group of engineers, who graduated from Chiang Mai University, Thailand; with both master’s degrees and doctorates (PHDs) in engineering. Its engineering teams have expertise in electrical, mechanical, energy and environmental industries; through research, design, construction, installation and maintenance. TEE aims to continue to innovate for commercial clients by helping them conserve energy. The organisation also supports SMEs (small to medium enterprises) by using technology that saves costs on production. TEE is dedicated to building strong relationships with tangible outcomes.

Contact TEE, Thailand.
Email : [email protected]
Bangkok Office: IDEO Q  BUILDING   138/65 Phayathai Rd., Rattawee , Bangkok ,Thailand.
Head Office: TSUS BUILDING(A) 130/10 M1.,T.Changphuak,A.Muang,Chiangmai,Thailand.

View Website

Redflow reports strong interest in household flow battery technology

Simon Hackett, the executive chair of battery storage maker Redflow, says the company’s first shipment of 10kWh zinc bromine “flow” batteries is en route to Australia, but that rolling them out to the market will be a slow process, but expressions of interest in the Australian made technology numbering in the thousands, reports Sophie Vorrath of One Step Off the Grid. Full full story at