IN Brief:
- Equinix is running a 12-week hydrogen backup power pilot at its DB3 data centre in Dublin.
- The trial uses two GeoPura hydrogen generator units integrated with critical cooling and UPS-backed systems.
- The project adds to wider testing of low-emission alternatives to diesel backup power for critical infrastructure.
Equinix is trialling hydrogen backup power at its DB3 International Business Exchange data centre in Dublin, working with ESB and GeoPura on a 12-week pilot in a live critical power environment.
The pilot uses two hydrogen-powered generator units developed by GeoPura, with one of the units owned by ESB. The containerised systems are supporting cooling loads at the Blanchardstown facility and are being integrated with the data centre’s existing resilience architecture.
Using proton exchange membrane fuel-cell technology and renewable hydrogen, the units generate electricity without combustion at the point of use. The pilot is assessing operational performance, safety, commercial suitability, carbon reduction, and the potential for backup systems to support peak-shaving under grid stress.
Backup generation remains one of the more demanding areas of data centre decarbonisation. Diesel generators are widely used because they are mature, dispatchable, and proven under emergency operating conditions, but they sit uneasily with the carbon reduction commitments now being applied to large digital infrastructure. Replacing or supplementing them requires a system that can provide rapid response, predictable run time, safe fuel handling, and high reliability during low-frequency, high-consequence events.
The trial also comes as data centres are becoming more active participants in electricity system planning. Cloud computing, artificial intelligence, and digital services are concentrating large loads in areas where grid capacity is already under pressure. The electrical design of a data centre can no longer be viewed only through the lens of site resilience, because its operating profile increasingly affects local network capacity, connection strategy, and demand-side flexibility.
Hydrogen backup power offers one possible route through that tension, particularly where critical loads require longer-duration resilience than battery systems can economically provide on their own. Fuel-cell systems can sit alongside UPS equipment, batteries, and conventional generation, creating a layered resilience model in which each technology serves a different operating window.
The harder questions sit around fuel logistics and operating economics. Renewable hydrogen remains a constrained and relatively expensive fuel, and its value in backup power depends on storage, delivery, safety zoning, maintenance procedures, and the number of operating hours the system is expected to provide. Low utilisation can support resilience needs, but it can also make the commercial case more sensitive to capital cost and fuel supply arrangements.
Data centre power architecture is already moving towards more integrated site energy systems. Power-focused technology at Hannover Messe showed the same convergence between critical power, energy management, electrification, and grid services. The Dublin pilot fits that pattern, with backup generation being tested as part of a wider operating system rather than as an isolated emergency asset.
For grid operators, large backup systems may eventually provide value beyond outage response if they can operate safely and predictably during tight system conditions. A hydrogen unit capable of reducing grid draw at peak periods could support demand management, although any such use must be balanced against fuel cost, emissions accounting, equipment duty cycles, and the primary requirement to preserve site resilience.
The engineering test is therefore practical. A data centre backup system must work with existing protection, controls, UPS infrastructure, cooling loads, and operational procedures. It must also do so without introducing unacceptable risk into a facility where continuity of supply is commercially and technically critical.
As data centre demand grows, the sector will need more varied approaches to resilience. Batteries, hydrogen systems, grid-side flexibility, and conventional generators are likely to coexist for some time, with different combinations selected according to site constraints, available grid capacity, and critical load requirements. The Dublin pilot gives hydrogen backup power a useful operational test in one of the more demanding settings available.
