Executive Summary
- In this article by Mercury Power’s Sales Director, Stuart Farmer, he says that retrofitting is happening now, but there’s still a missing piece of the puzzle – energy storage.
- It is an active component in how data centres respond, adapt and maintain resilience, and within retrofit projects, the energy storage constraints are more visible. It’s time that energy storage did more.
- It must respond faster, operate safely within increasingly dense environments, and integrate seamlessly into both new and existing infrastructure
Retrofitting is no longer a long-term consideration. It is happening now, across live and operational sites.
As AI workloads continue to scale, the data centre industry is facing a new kind of pressure. Operators must not only expand capacity, but also adapt existing environments to support increasingly complex, high-density demand.
Much of the industry focus has rightly centred on compute and cooling. These are visible, immediate constraints. But between the pressure to power AI workloads and the need to cool them effectively sits another critical layer that is still too often treated as static: energy storage.
Traditionally, energy storage has been positioned as a safeguard. A necessary layer of protection in the event of failure, but as infrastructure becomes more dynamic, that role is beginning to shift. Energy storage is no longer just about backup. It is becoming an active component in how data centres respond, adapt and maintain resilience under fluctuating loads.
This shift is particularly evident in retrofit environments. Unlike new builds, where infrastructure can be designed from the ground up, retrofitting requires working within fixed constraints. Space is limited. Systems are live. Risk tolerance is low. Every decision must balance performance, safety and practicality.
In these conditions, the limitations of existing energy storage technologies become more visible. Many of today’s widely adopted solutions have proven their value over time. But it is worth asking whether they were ever designed for the level of flexibility, responsiveness and integration now required.
That question is becoming increasingly relevant as demand continues to evolve.
Future-ready energy storage will need to do more.
It must respond faster, operate safely within increasingly dense environments, and integrate seamlessly into both new and existing infrastructure. It must also support longer-term sustainability goals, as operators face growing pressure to reduce environmental impact without compromising performance.
These are not future considerations. They are active challenges being worked through across the industry today.
At Mercury Power, this shift is not theoretical. It is something we are seeing directly through current commissioning and testing activity in live environments, working alongside partners, OEMs and engineering teams to understand how energy storage behaves under real operational conditions.
What is becoming increasingly clear is that the conversation around infrastructure can no longer be siloed. Compute, cooling and power must be considered as part of a more integrated, responsive system. Furthermore within that system, energy storage is no longer sitting quietly in the background. It is becoming a defining part of how infrastructure performs under pressure.
As the industry continues to evolve, the question is no longer just how we power data centres, but how we adapt the infrastructure around them to remain resilient, efficient and safe in the face of accelerating demand. Energy storage is a critical part of that answer.
