Keep Energy Systems is developing a stationary, medium to long-duration energy storage solution that delivers resilient, affordable, efficient energy storage in a modular, containerised package.
The technology stores energy in the form of heat and pressurised air, re-tasking ex-service truck engines to become zero-emission electrical power-conversion machines. The resulting system does not use diesel or any fuel. It is safe, straightforward to operate, has a lifetime of up to 25 years and can deliver turnaround efficiencies of around 65%.
Even in extreme conditions, the system is designed to deliver dependable performance. With storage capacity up to 20 hours at full power it provides ample energy time-shifting capacity and ensures energy availability during grid outages, adverse weather, or other disruptions.
The system also provides real inertia and fault current tolerance, helping to stabilise local power systems so that power is maintained even while failures are occurring elsewhere on the power network.
The modular, containerised design of the system allows flexible deployment. Power and storage can be independently scaled to meet specific energy storage needs and available site space.
Multi-system installations also offer further resilience through system-level redundancy and optional additional services such as black start can be specified.
For customers that require enhanced resilience and independence in operations, local personnel can be trained in first-line maintenance and repair, building on commonly available skills and using common tools.
The system is designed from the ground up to the latest industrial cyber-security standards allowing confident connection to local power systems and enabling secure equipment health monitoring.
Unlike chemical-based alternatives, the system contains no flammable or toxic materials or fuel. It uses stable thermal- and air-based storage technology, which greatly reduces operational risk. The system is walk-away safe.
Thermal and noise signatures can be abated using insulation, burial and other means if required to further harden local infrastructure.
The system is affordable to install and customers can start small and add power and storage capacity as their needs evolve. Because it’s engineered for longevity, the system can operate reliably for up to 25 years. This significantly reduces replacement frequency and maximises return on investment.
Over time, the system experiences minimal efficiency loss. This enables consistent energy output without the performance fade often seen in chemical battery systems.
It offers competitive lifetime costs when compared to traditional battery systems or fossil-fuel alternatives.
Its long life and the fact that the system is made from readily available and recyclable materials means the system is more sustainable than many chemical alternatives. The design can incorporate previously used diesel truck or generator components and pressure vessels and Keep Energy Systems is committed to establishing circular and refurbishment supply chains to minimise the installed and in-service carbon footprint of our systems.
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