Sustainable energy independence
Off-Grid MPowerTank System
_____
MPowerTank empowers on-grid living, off-grid. If connecting to the grid is too expensive, complicated or impractical, enjoy the peace of mind that comes with fire safe self-reliance with our uniquely sustainable solution.
A durable, reliable, valuable stand alone power system
__________
Our MPowerTank leverages the benefits of both mechanical batteries and our Australian engineered and manufactured, industrial grade SENSSA Energy Management & Control System, to endure the harsh Australian conditions. Enjoy 30+ years of empowerment with an energy system that lasts as long as your property.

Software
Key Energy’s Smart ENergy Storage Solution for Australia (SENSSATM) Energy Management & Control System
__________
The Smart ENergy Storage Solution for Australia (SENSSA) Energy Management Control System – is our proprietary Australian engineered and manufactured energy management control system. It operates and optimises the solution, controlling the power output of the solution for your home or business by connecting the inverter, power electronics, flywheel management system and other industrial grade monitoring and control hardware into a cloud-based 4G communications, and energy management software.
Most batteries come with basic battery management systems that only handle safety protection. Inverters can sometimes be programmed to schedule a once daily charge and discharge at set times. While this may be sufficient for a regular load profile, it does not work well when the customer has dynamic load profiles (e.g. 24/7 or night production shifts and operations, volatile peak electricity demand levels such as HVAC, motors, machinery etc.), when the wholesale market is particularly high priced, or for sudden high peak demand charges.
This means you may not see your bill reduce materially – despite investing in an expensive solar and battery system! To solve this problem, our SENSSA enables dynamic load following, manages peak charging issues with an AI and machine learning supported trading algorithm. Additionally, our SENSSA unlocks wholesale market selling (at an additional subscription cost) to support trading on the market to earn additional cash.
Energy Storage Control
Decides when and how much power to charge your batteries based on how much available solar and storage is available
Integration
Integrates Australian Standard compliant equipment such as inverters, smart meters, generators and load controls
Cloud-based web monitoring
Watch every second of how your system is operating via our web dashboard and monitoring system
Load prediction & control
Combine thousands of data points together with our AI and Machine Learning models to predict and control your electricity use
Wholesale Market Ready
Automatically sell your excess energy to the wholesale market at the right price for energy market arbitrage (pending Regulator Approval)
Advanced Functionality
Key Energy’s SENSSA unlocks advanced control features and functionality for your whole energy system
SENSSA Additional Functionality
OEM FMS | Key Energy SENSSA | |
---|---|---|
Safety | ||
Scheduled charge/ discharge | On request | |
Off-grid / Backup Power | ||
Load Following | ||
Time of Use Bill Management | ||
Demand Charge Reduction | ||
AI & Machine Learning | ||
Predictive Analytics | ||
Energy Arbitrage (Wholesale Pricing / VPP) |
Advantages
__________
Key Energy’s MPowerTank is designed and built to withstand the extremes of the Australian environment. More durable, more reliable, safer and more valuable than chemical batteries, this is the alternative for those who want to power themselves for the long term.

Lasts 30+ years
11,000 cycles (30 years at 1 cycle per day) at full capacity throughout means this is what you’ve finally been waiting for. This system will have as much power and energy storage capacity at the end of life as it did brand-new.

Works in extreme temperatures
Tested in up to 50 degree ambient heat and 100% condensing humidity, the MPowerTank will operate even in the harshest conditions, guaranteed.

Safe from chemical fires
The mechanical battery does not use chemicals as the method to store energy, so there is no risk of lithium fires that can’t be put out, or other chemical fires.

More valuable than a grid connection
Our systems are generally cost-neutral with a new grid connection for off-grid customers who have to pay for new poles or transformers, let alone ongoing electricity bills. With a variety of flexible payment options, (operating leases, third party finance, or upfront purchase), cost won’t stand in your way.

Simple yet robust industrial grade components
Key Energy’s MPowerTank uses industrial grade components to support the ultra-durable mechanical battery. Originally designed for solar farms and industrial plants, we’ve re-purposed the flywheel to the harshest known conditions in the world – Australia’s off-grid market, featuring IP56 cabinets and industrial cabling.

Easy to install and maintain
Designed by our installer team to minimise on-site time and complexity, the system is pre-cabled, pre-terminated and plug and socket based where possible – the only electrician required termination is to connect to the main switchboard.
Off-Grid Projects
__________


Request to see a local MPowerTank
Contact us and mention that you would like to see a local MPowerTank system so we can arrange with your nearest demonstration site!
What’s Included in the MPowerTank System
- Flywheel (Amber Kinetics’ M-series flywheel and e-box, vacuum pump and accessories)
- Above-ground enclosure
- 20kW Inverter – 3 phase, multi-mode (off-grid and on-grid/generator ready), hybrid (solar + battery) inverter
- Key Energy SENSSA Energy Management and Control System (Hardware + Software)
Specifications
__________
Specification | MPowerTank M32 | |
Energy Capacity (kWh) modular, up to MWh | 32 | |
Charge & Discharge Power Capacity (kW) | 8 | |
Charge/Discharge Duration (hours minimum) | 4 | |
Cycle Design Life (cycles) no daily cycle limit | 11,000 | |
GHG Emissions | None | |
Temperature (℃ operating) | -20C to 50C | |
Round trip efficiency (DC to DC includes self discharge) | >86% | |
Max output DC current (A) | 13 | |
DC Input-Output Voltage Range (VDC), nominal | 550 – 750, 650VDC | |
Self Discharge (Watts, Average over charge/discharge cycle) | <100W (average), <350W (max) | |
Auxiliary Power (Watts, 240VAC Average over SOC range) | <140W (average), <300W (max) | |
Full Power Response (mS) | >80mS | |
Installation Method | Above Ground | |
Noise (from electronics box) | <65dB(A) | |
Modularity | 1 to 16 units (32kWh to 512kWh) per array, multiple arrays possible |
Materials and specifications are subject to change without notice.
Pricing
Invest in a lower grid bill for over 30 years
__________
Our system can save you more money than solar alone, and depending on your usage may be able to make you fully independent of the grid except in rare circumstances where you use a lot of energy or prolonged periods of low solar energy. Customers that can export and sell energy back into the grid, even at low “feed in tariff” rates are achieving credits to their bills once again!
Compared to traditional storage solutions like lithium batteries, flywheel technology has a significantly lower Levelised Cost of Storage (LCOS) at $0.14/kWh to $0.18/kWh excluding GST, compared to the LCOS average for lithium batteries from $0.28/kWh. If you pay more than this for peak period electricity, then you will be saving with our storage system.
You can start with a standard basic package or we offer custom options for your project to make it work for your home and property. Every project is different, and pricing depends on many factors such as where your project is, how much solar you have or will need to add, panel type and size, scope of works, government rebates and grants, project complexity and distance from the nearest depot.
Upfront outright purchase
Despite expected output over it’s lifetime being 300% greater than a conventional battery system, you can expect to be paying only 20-40% more per kWh than a good quality battery system, fully installed, excluding freight (which we provide at cost) and GST (as our customers are mainly GST registered businesses). Prices start from around $1,550 / kWh and can rapidly reduce in cost per kWh if multiple mechanical batteries are added (as you generally only need to pay for additional mechanical batteries), but could also increase in price if more components are required.
Leasing and third party financing options
Key Energy offers a range of flexible financing options designed to make owning a flywheel energy storage system accessible and impactful. Some of our lease payment plans and lengths can result in a monthly payment of less than $600/month ex GST at current interest rates and depending on the length of the lease. Call us to find out more about what your system investment is!


Early Adopter Offer
If you are the first client to install a mechanical battery in your area and are open to future customers taking a look at your system, you will be able to access a variety of benefits for your project. Simply request a quote and tell us where the project is, and if you’re the first in the area we’ll make the offer to you automatically!
Off-grid MPowerTank Real Time Operations Dashboard via our SENSSA Energy Management & Control System
__________
Our industrial grade SENSSA Energy Management & Control System provides a real-time view of your power system, with more detailed information and customisable to your needs. This live real project data is of the pilot off-grid system in Armidale, NSW. Learn more about the project
Safety
Engineered Above Ground Enclosure
__________
The Amber Kinetics M32 steel flywheel is incredibly safe, and has been designed with safety as a foremost principle, resulting in no history of accidents or catastrophic failure for over 15 years and millions of operational hours. However, we at Key Energy treat safety as our top priority and endeavour to independently verify all claims and mitigate any catastrophic impacts to an acceptable level. At full 32kWh speed, the rotor is spinning at c. 150 Hz, so any risk of catastrophic failure (steel ruptures) must be mitigated to protect people and property.
Key Energy collaborated with University of Technology Sydney (UTS), generously supported by the NSW Government TechVouchers grant program, to validate our safety enclosure design for the 32kWh flywheel. Using the latest in Finite Element Analysis techniques, their Centre for Built Infrastructure and Research (CBIR) experts in concrete and civil engineering created a high fidelity model and ran dozens of simulations through their supercomputer to validate that the Key Energy engineered design would keep people and property safe in the event of a catastrophic failure of the rotor. Proudly made in Australia, using all Australian structural steel and special grade concrete and materials, our above ground enclosure will last as long as the flywheels, protecting them from the weather and animals, and protecting people and property from risk of harm.


32 kWh Enclosure
Our latest commercially available 32kWh enclosure comes in a corrugated stainless steel enclosure, with the option to select custom colours for added cost to fit the aesthetic of your property’s landscape
Key Energy’s Design to Discharging Process
1-2 weeks
Details
Give us a call on or fill in an Enquiry Form to begin the journey of using more of your own power. Tell us about your home or project, energy or lifestyle goals, and ideally have some data available for us to design your project correctly. If your project is simple and you just want one of our MPowerTanks, we will explain the system in detail and answer any questions you may have. For complex projects we will assess the data to give you a high level solution design proposal and rough order of magnitude project costs.
If you agree to continue, one of our technicians or representatives will visit your proposed site to collect additional data if necessary, confirm access and other installation requirements, update the quote if necessary, and talk you through the draft solution design.
1-2 weeks
Details
With an agreement on all the project details you will be provided an accurate final technical plan with scope of works, solution outcomes, possible variations and a total cost of work, as well as areas that could risk fee over-runs, though we try to minimise these as much as possible. Once you understand and are happy with the project proposal, you will be able to sign the contract to begin the delivery process.
2-6 weeks
Details
If you are still building your property or have no pre-existing base slab, then you will need time to prepare the concrete slab to our standardised specification, or we can provide a pre-cast concrete slab. If you have an existing concrete base and location on site to use, we will confirm that it is suitable for the loadings of the MPowerTank. Stock is kept on-shore in our Sydney factory and warehouses in capital cities in Australia, but can be shipped to order to any port destination as required. We generally arrange delivery that suits you or your client’s timing and minimises expensive logistics costs. We can have a unit shipped within the week if you have everything ready.
2-3 days
Details
Before the system is installed Key Energy with prepare all material, installers and certificates before the project starts. Key Energy keeps local stock on hand so depending on location and logistics, delivery can be arranged for a suitable date. Installation usually takes 1-2 days.
Commissioning is the process of turning the system on and providing power to your home or business, and running a series of tests to ensure the system is working. Key Energy performs and monitors a full cycle test, both locally and with remote support, and once tested, hands over the system providing all information on how to operate, troubleshoot and monitor the system
Ongoing
Details
Key Energy will remotely monitor your system for any alarms or faults. We provide SMS alerts to a designated number (or up to 12 email notifications) for any critical faults that need on-site attention. We’ll also provide you the number of a dedicated support engineer. We remind you for your scheduled maintenance, comprising an annual vacuum pump oil inspection, and dust filter cleaning. We continue to provide ongoing support and maintenance to ensure the system is operating as good as it did brand-new.