Why Your UPS Systems Are The Key to Unlocking Data Centre Efficiency

From hyperscale campuses powering the latest AI platforms, to colocation sites, enterprise and smaller scale edge facilities, data centres are back in the headlines. But with this visibility comes increased pressure to reduce their carbon and environmental impact.

The big operational challenges for operators still remain, compute density is increasing, energy costs remain volatile and sustainability targets, once aspirational, are now increasingly regulatory and more importantly, reputational. Amidst all this public scrutiny, the role of the Uninterruptible Power Supply (UPS) is being fundamentally redefined.

Across all types of data centres, energy efficiency has become top of the agenda as a critical design consideration. According to the International Energy Agency (IEA), data centre energy consumption has risen four times faster than the rate of total electricity consumption.

Globally, data centre electricity consumption is set to more than double to around 945 TWh over the next 5 years. In short, this means that their energy demands will exceed 3% of global electricity consumption.

This rapid growth is being driven by increased AI adoption, cloud computing and a global uptake in digital services. What this figure does not fully explain is the wide variation in efficiency performance, particularly between those inefficient older legacy enterprise sites and the latest hyperscale facilities. What these figures illustrate is the reality for all data centres, that even marginal efficiency improvements can scale into significant cost and carbon savings.

Power Usage Effectiveness (PUE) still remains the data centre industry’s key metric. Data published by the Uptime Institute shows that while average global PUE has improved significantly over the past decade, falling from a high of around 2.5 in 2007 to approximately 1.54 in 2025. However, further efficiency gains are becoming tougher to achieve.

Modern hyperscale facilities regularly operate below 1.2 PUE, but many enterprise and colocation sites still have areas for improvement. Power infrastructure, including UPS design and configuration, can play a big role in closing that energy efficiency gap.

UPS systems are no longer simply power insurance policies, waiting for a major grid failure. In modern data centres, they now continuously monitor and condition power, reduce harmonics and stabilise voltage, directly influencing energy losses and cooling demand.

For example, with the latest innovation in double conversion and increased reliability, UPS equipment can now achieve real world efficiencies of over 98%. At this scale, even a 1% efficiency gain can deliver significant reductions in data centre electricity consumption and heat output.

Any improvement to efficiency matters across the full range of data centres. In hyperscale environments, efficiency improvements can translate into millions of pounds in annual operating expenditure savings.

In colocation facilities, they can support competitive pricing and help achieve sustainability credentials. In enterprise and edge sites, where legacy infrastructure and physical space constraints are more common, deploying efficient, smaller UPS systems can deliver performance improvements, without undertaking expensive facility rebuilds.

There is also a growing shift towards more modular, scalable UPS platforms that allow capacity to be deployed, in line with rapid changes in power demand. One of the core factors that affects efficiency is the number of power outages that are still occurring.

These outages are often linked to ageing power grid infrastructure, an increase in extreme climate conditions and rising demand from evolving AI systems. All of which are placing new stresses on both power systems and operational processes.

Modular UPS approaches can help improve part-load efficiency and support phased growth, delivering data centre resilience rather than simply managing traditional worst-case power scenarios and outages.

Looking forward, UPS systems are increasingly being integrated into wider energy strategies. Interactive power grid capabilities, demand response participation and digital monitoring are turning the latest UPS infrastructure into an active contributor to energy optimisation and decarbonisation strategies.

 As data centres, of all types, continue to face increasing corporate scrutiny, particularly from framework initiatives such as Environmental, Social and Governance (ESG) over energy use and improving environmental targets, UPS systems will play a critical and increasingly visible role in balancing resilience, sustainability and efficiency.