Redflow's ZBM 2 (Zinc Bromide Module)
Redflow Battery video
Each battery contains about 100 litres of a water-based zinc bromide salt solution that circulates in two separate hydraulic circuits. When charging, zinc is extracted from the zinc bromide solution and stored on a plastic membrane. During discharge, zinc is released back to the solution. A major benefit of this process is that it causes no degradation to the battery when the zinc is removed at the end of each cycle, giving it a sustained, long-life energy storage capacity.
REDFLOW BATTERIES REDEFINE YOUR UNDERSTANDING OF HOW A BATTERY WORKS
- Redflow batteries deliver 100 per cent cycle depth of discharge without causing any damage to the battery
- Redflow batteries retain their full energy storage capacity throughout their expected life, unlike legacy battery types which lose considerable storage capacity with age
- Redflow batteries require no reserved capacity, unlike legacy battery types that must reserve a significant portion of their storage capacity to prevent damage to the battery. Therefore with Redflow batteries there is no over-sizing required
- Redflow batteries present no fire risk: Their bromide-based electrolyte is a natural fire retardant while mechanical damage does not risk explosion or ‘thermal runaway’
- Redflow batteries can operate at ambient temperatures as hot as 50°C without active cooling
- Redflow batteries offer unlimited shelf life: You can switch off a Redflow battery at any state of charge, hibernate it for extended periods of time, and then access its stored energy within 60 seconds
- Redflow batteries have a great recycling story as they are made from components that are easy to recycle or reuse
- Redflow batteries are designed and developed in Australia and available globally through a scalable manufacturing partnership with Flex in North America.
ZBM Installation Images
REDFLOW BATTERIES RETAIN FULL ENERGY STORAGE CAPACITY FOR THEIR WARRANTED LIFE
A Redflow battery can be completely discharged every single day without causing any damage to the battery. This means a Redflow battery retains its full energy storage capacity throughout its warranted life.This stands in stark contrast to other battery chemistries, such as lithium, which must reserve a significant portion their energy storage capacity to avoid battery damage and also experience reduced storage capacity over time. As Redflow warrants its batteries to deliver 100 per cent of their original energy storage capacity for at least 10 years, this eliminates the need for oversizing capacity, making Redflow batteries capital expenditure competitive with older battery technologies.
REDFLOW BATTERIES CAN BE LEFT CHARGED OR FULLY DISCHARGED WITHOUT IMPAIRING PERFORMANCE
Redflow batteries can sustain regular outages without impairing its energy storage capacity or lifetime performance. Redflow batteries can also be suspended, stored or hibernated, with anything from no charge to a full charge, for as long as required. This sets Redflow batteries above traditional battery chemistries, which lose charge over time and require trickle charging. The ability of Redflow batteries to hibernate without harm or loss of stored energy makes them ideal for applications that require only occasional energy draws, such as seasonal businesses or an unstable grid.
REDFLOW BATTERIES ARE EXTREMELY SAFE
Redflow batteries contain a bromide-based electrolyte that is a natural fire retardant. With a separate tank and stack, there’s no chance of mechanical damage causing a thermal runaway.
Redflow batteries also require no fire suppression system or safety abuse testing.
REDFLOW BATTERIES WORK WITHIN A WIDE RANGE OF TEMPERATURES
The performance, safety and lifetime of Redflow batteries are unaffected when the internal electrolyte temperature is maintained within the range of 15 to 50 degrees Celsius. No active cooling is required. If the electrolyte temperature exceeds this range, the Battery Management System (BMS) will safely shut down the battery until the temperature returns to the tolerated range.
It is important to note that the electrolyte temperature is different from ambient air temperature. As flow batteries have a large thermal mass, including 100 litres of electrolyte solution, this means that the internal battery temperature is much less volatile than the ambient air temperature.
REDFLOW BATTERIES CAN BE USED BOTH ALONE AND IN MULTIPLES
Redflow batteries are designed to enable you to deploy an energy storage system that uses as many batteries as you need to support your requirements. You can install just one Redflow battery or as many as 60 Redflow batteries, in a container-size Redflow LSB (Large Scale Battery), which can store 600kWh of energy for grid- scale deployments. Multiple containers can also be connected for larger storage requirements.
REDFLOW BATTERIES ARE WELL-SUITED FOR OFF-GRID ENVIRONMENTS
Redflow batteries are a great choice for off-grid energy systems, with many technical superiorities, including performance, lifecycle and robustness.
REDFLOW BATTERIES ARE MADE FROM RECYCLABLE OR REUSABLE COMPONENTS
The Redflow battery is constructed from easily recyclable materials, such as polyethylene plastic, aluminium and galvanised bolts.
The largest, and most expensive, element of the Redflow battery is the 100 litres of water-based zinc bromide electrolyte, which weighs about 140 kg. The beauty of this electrolyte is that, unlike lithium, it is cost-effective and practical to reuse.
REDFLOW BATTERIES ARE DESIGNED IN AUSTRALIA AND MANUFACTURED GLOBALLY
Redflow is an Australian company with its head office, research and development centre in Brisbane. Redflow has the test lab and installer training centre for its ZCell residential energy storage system in Adelaide. The full Redflow battery range, from the ZBM battery, which is at the heart of ZCell, to the Redflow LSB (Large Scale Battery), is manufactured in North America by Flex, one of
the world’s largest end-to-end supply chain solution providers. This enables Redflow to ramp up manufacturing rapidly to meet demand. With a global manufacturing footprint, Redflow can service key areas at their nearest point. This scalable manufacturing enables Redflow to increase production quickly at a relatively low cost.
REDFLOW BATTERIES ARE SMALLER AND MORE FLEXIBLE THAN OTHER FLOW BATTERIES
Redflow makes the world’s smallest flow batteries. Alternative flow battery designs, such as vanadium, are much larger and provide a lower energy density. This means similarly rated flow batteries from other manufacturers have a much larger physical size, causing floor loading, logistics and installation issues.
SIMPLIFIED BATTERY MANAGEMENT WITH REDFLOW’S BATTERY MANAGEMENT SYSTEM (BMS)
Each Redflow battery comes with an integrated Battery Management System (BMS) that can manage one or more flow batteries. Accessed via a standard web browser from a personal computer, tablet or smartphone, the BMS is an intuitive web- based management system that provides an easy way to set up, monitor, and control your Redflow battery. The BMS uses various industry standard protocols to integrate the Redflow battery with energy management electronics from a wide range of vendors. The BMS can also provide control signals to various external systems and interfaces.
For example, it can coordinate the operation of a backup generator using dry-contact relay outputs, MODBUS-TCP commands or via JSON data queries over a TCP/IP connection. These control signals can be based on a wide variety of battery status criteria such as state-of-charge, battery voltage and time-of-day.
The BMS also provides integrated graphs showing a variety of key performance characteristics and allows for the downloading of detailed battery system performance data securely over any available Internet connection. Leveraging that connection to offer additional benefits, the BMS can be remotely upgraded over the Internet and also supports remotely upgrading the control firmware embedded inside each battery. Battery performance and status information can also be accessed remotely.
THE REDFLOW ZBM2
Why Redflow zinc-bromide flow battery technology?
100% of the capacity is usable over lifetime, with no capacity fading therefore no oversizing required
BEST IN CLASS LCOS
Warranted electrode stack lifetime 36,500 kWh energy delivered or 10 years (whichever comes first)
UNLIMITED SHELF LIFE
Sustains regular outages without battery damage and can be suspended, stored or hibernated from 0% to 100% state of charge
RECYCLE OR REPURPOSE
For all Redflow battery components and electrolyte
Charge 100% of the capacity with constant power, due to a flat voltage curve and simple one stage charge profile
COMPACT AND HIGH ENERGY DENSITY
0.34m2 (3.7ft2) with expected electrode stack throughput 40,000kWh
Fire retardant electrolyte, no thermal runaway due to separated tank and stack
No fire suppression system necessary or safety abuse testing required
NO ACTIVE COOLING REQUIRED
Lifetime, safety and performance are not affected by temperature
INTUITIVE WEB BASED MANAGEMENT SYSTEM
24/7 remote self-monitoring with real-time data capture accessed via the web, through the MODBUS communications system
Typical Charge and Discharge Curves
VOLTAGE: 48 Volt DC nominal batteries (typical operating range 40-60V)
CAPACITY: Maximum 10kWh energy output per daily cycle. No reserved battery capacity requirement - full 10kWh cycle depth available
DIMENSIONS: 845L x 823H x 400W (mm); 33L x 32H x 16W (in)
WEIGHT: 240kg (530 lb) with electrolyte; 90kg (198 lb) without electrolyte
ELECTROLYTE VOLUME: 100L (26Gal)
NET ENERGY EFFICIENCY: 80% DC-DC Max
OPERATING ELECTROLYTE TEMPERATURE RANGE: 15°C to 50°C (50°F to 122°F), ZBM2 can typically operate at ambient temperatures outside this range for extended periods
COMMUNICATION: MODBUS RS485
SAFETY DATA SHEET: DG Class 8 for electrolyte
POWER RATING: 3kW (5kW peak)
- 3kW continuous: current up to 75A (40V disconnection point)1
- 5kW duration depending on the State of Charge (SOC): current up to 125A (40V disconnection point)(1, 2)
- Electrode stack: 36, 500 kWh of energy delivered or 10 years (whichever comes first)(3)
- All other parts: 3 years(3)
1. Values reported for ZBM2 at 100% state of health (SOH) and room temperature
2. Redflow internal testing shows a 5kW supply for approximately 45 minutes before disconnection, for a ZBM2 starting at 100% state of charge (SOC)
3. See full warranty document for details, T's and C's apply
Off-grid solar systems recently commissioned by SPECIALIZED SOLAR SYSTEMS for a client living completely off the grid on a small holding located Botswana. 120 solar panels and 72 batteries are just some of the components used for the off-grid solar powered system designed by SPECIALIZED SOLAR SYSTEMS to supply renewable energy with a daily average of 165kWhrs solar yield. The batteries have the capacity in storage to reach a DOD (depth of discharge) of 25% after 60 kWhrs, of usage without a charge, maintaining system efficiency and lifespan, and the solar system incorporates generator support for extended periods of bad weather or higher than normal electrical loads.
Video taken during the installation of the solar panel arrays before the vegetation surrounding them was cut down to maximise solar energy generation.
WIDOWBIRD (PTY) Ltd
Gaborone Industrial Commerce Park
t: +26 73975441
f: +26 73975282
m: +26 771320202
Installation of demonstration solar unit at the UNISA Institute for Social and Health Services
Specialized Solar Systems (SSS) was asked to supply and install a demonstration unit at the Unisa Institute for Social and Health Services at their campus, south of Johannesburg. The initiative was initiated by PEER Africa, who in collaboration with the UNISA research team, headed up by Dr. David K Kimemia who is researching a comprehensive model for the supply of services and solutions to be deployed in Day Care centres.
SSS was selected to demonstrate alternative energy that could provide dignity and functionality that would enhance the life quality and conditions at these centres.
Click on images to enlarge
Two demonstration units were built on the tennis court at the facility. It was decided to install a Sub-centralized System (energy producing off-grid solar station) as the primary source of energy. This system is equipped with four solar panels, batteries, switchgear and monitoring equipment with wi-fi functionality active for remote monitoring and switching. Furthermore, communication was established between the system and linked to the SSS e-power utility-based online solar energy management platform for further functionality.
One of the units was equipped with two inside lights, one outside security light, a DC plug box, linked to an internal Distribution Unit with cell phone charge point. The second unit was equipped with a Distribution Unit, Two lights inside and one security light outside.
Furthermore, a DC television (equipped with USB port for the viewing of Movies, Photo’s etc.), DC Radio, DC Cooler fan Unit, and DC Fridge/Freezer was added to demonstrate the functionality of the System. Also on display is the ‘Refugee Unit’ designed and built under specification to serve as a water container with kettle, built-in battery and controller and the ability to pump water to a shower head for cleaning of wounds etc. The unit also has a light and the ability to charge cell phones and the ability to connect small DC appliances such as a radio, additional lights etc.
The philosophy behind the planning for these units is to supply lights as essential, cell charging for communication, the radio for information and the television. The measure of functionality achieved will help bring these targeted institutions closer to their constitutional right to dignity.
The installation was well received by all the stakeholders and great excitement generated.
Article from Die Burger
Sonkrag by winkelsentrum in George ingespan
Sonkrag gaan van Saterdag ingespan word om te help voorsien in die elektrisiteitsbehoeftes van ’n groot winkelsentrum in George, Thembalethu Square.
Sover bekend, is dit die eerste groot private onderneming in die Suid-Kaap wat sonkrag gaan gebruik.
Die George-lughawe, wat deur die Lughawensmaatskappy van Suid-Afrika (Acsa) bedryf word, gebruik reeds sedert Februarie sonkrag.
Die sonpale by Thembalethu Square is op die dak van die winkelsentrum aangebring. Specialized Solar Systems is die kontrakteurs van die projek. Die maatskappy is een van die leiers op dié gebied.
Die aanvoerwerk is reeds in Mei vanjaar gedoen en die projek is onlangs voltooi.
Jeanne-Mari Scholtz, die sentrumbestuurder, sê die sentrum is in September 2012 in gebruik geneem. In die eerste twee jaar van die sentrum se bestaan het dit swaar getrek, maar die afgelope twee jaar het dit baie gegroei.
Die idee om sonkrag te gebruik, het van die eienaars gekom. Hulle het in sonkrag belang gestel en wou vasstel hoe dit tot besparings kan lei.
Navorsing is gedoen en daar is gekyk hoe volhoubaar dit by die sentrum ingestel kan word.
Samesprekings is ook met die munisipaliteit en ander belanghebbendes gevoer.
In die navorsing het verskeie faktore aandag gekry, soos hoeveel sonlig op ’n spesifieke tyd by die sentrum beskikbaar is.
Die koste van die projek beloop sowat R4,4 miljoen en daar word gehoop dat dit op lang termyn sowat R35 000 per maand op die sentrum se elektrisiteitsrekening kan bespaar.
645 sonpanele is aangebring en dit sal 1 040 kWh per dag kan opwek.
Scholtz benadruk dat die sonpanele nie in al die elektrisiteitsbehoeftes gaan voorsien nie. Dit sal die elektrisiteit wat die sentrum van die munisipaliteit koop, aanvul.
Die plan is om die projek later uit te brei en moontlik batterye te installeer. Van die opgewekte sonkrag sal dan in die batterye gestoor kan word.
Volgens Scholtz is dit skoon energie. Dit hou verskeie voordele in. Dit verminder onder meer die vrystelling van koolstofdioksied in die atmosfeer.
Daar word ook gehoop om met die projek uiteindelik geld te bespaar wat dan weer teruggeploeg kan word in die gemeenskap.
Die projek verhoog ook die kapitaalwaarde van die sentrum.
- October special on our 255 Watt Solar Modules
- Thembalethu Square Goes Solar
- The Solar Traffic Control Road Trailer
- SSK Branch managers visit Specialized Solar Systems
- VSD (Variable speed drives)
- Commercial sustainable solar solutions
- Tembalethu Square Shopping Mall George leads the way by going Green
- Residential solar system design and installation
- Utility-based solar energy management
- Grid-tied energy solution now at the SSK garage and CO-OP in Krakeel
- Grid-interactive Hybrid 3KV 11-12kWhrs per day solar system
- Sub-centralized solar energy power station complete
- (2016) Residential solar - A viable energy solution
- Botswana - 165 KWh - 30 KWp, Off-grid solar energy installation completed
- Jabula sub-centralized solar energy power station Stage 1
- Renewable Energy and the Internet for All
- Radio Talk Shows
- Off-grid installation in the Garden Route South Africa
- SSS is now proudly involved with Nigeria's national renewable energy roll-out
- (2016) SSS's new clip lock fastening system strength demo