O-Hx Ltd

Cooling Done Differently
Physics Doesn't Lie

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The most advanced form of high-power cold thermal storage available today
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Cold Energy Storage for your Sector

Data Centre

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Pharmaceutical

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Industrial

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Transforming Industrial Cooling with Intelligent Thermal Storage

We designed EnergiVault® our cold thermal battery to maximize heat transfer density, giving you the high-power discharge needed to reduce peak demand, guarantee resilience, and respond instantly.
 
Flexible Integration. Intelligent Optimisation. Built-In Resilience.

EnergiVault is designed to integrate seamlessly into both new builds and complex legacy systems, providing dynamic support for chilled water systems.

EnergiVault actively:

Powered by our proprietary, AI-driven control software, the system continuously optimises chiller operation, maximising efficiency while protecting uptime.

The outcome:
A cooling system that’s cheaper to run, harder to disrupt, and ready for a low-carbon future.

DC Install

Responds Instantly

Add Chilled
Water Resilience

Reduce Chiller Peak Demand

EnergiVault doesn’t warm up, spin up, or catch up. It responds now.

While traditional systems fight thermal inertia, EnergiVault injects high-density cold instantly, feeding chillers the moment demand moves.
 
No lag. No ramp-up. No compromise.
 
As the world’s first zero-emission thermal spinning reserve, EnergiVault delivers one hour of immediate cooling with zero fuel burned on standby, enabling diesel gensets to be shut down, not just backed up.

Cooling resilience doesn’t have to rely on diesel.

Most power disturbances are short, unpredictable, and over before traditional backup systems are fully online.
EnergiVault bridges the cooling load instantly, maintaining chilled water stability without starting fuel-based generators.
 
By responding immediately and operating independently, EnergiVault removes common failure modes such as start-up delays, inefficient idling, and wet stacking. If an event does persist, it provides valuable time to bring secondary systems online in a controlled way, without compromising cooling continuity.

Cooling is one of the largest contributors to peak electrical demand.

EnergiVault can deliver up to 1 MW of cooling per module for one full hour, allowing cooling load to be removed from the grid during the most expensive peak periods – without reducing performance or capacity.

By decoupling cooling demand from peak grid hours, EnergiVault eliminates the need for diesel-based spinning reserve.

With zero fuel consumption on standby, it reduces Scope 1 emissions while giving operators direct control over peak demand and energy costs.