Executive Summary

• The queue to get a grid connection is like waiting outside of a popular nightclub on a Saturday, so data centres are using batteries to skip the grid queue.
• Developers are strategically requesting smaller connections and procuring large on-site batteries, enabling the infrastructure to take little sips from the grid overnight when energy demand is low, fill up those gigantic on-site batteries and use stored power to run heavy-duty AI servers during the daytime.
• Energy storage must have a comprehensive strategy for energy storage if they want to be operational in the next year, instead of waiting several years for a grid connection.

It’s Saturday night, you’re queuing outside the best nightclub in town, the line is barely moving and you’re freezing, and some VIP hotshots are showing up at the entrance and the bouncer lets them through the door. This is the grid connection queue right now, and you’re the data centre without sufficient energy storage; the VIP hotshots are the data centres with batteries who won’t sit around and wait for a connection that takes years to acquire and build. The batteries are a “fast-pass” to skip the queue.

The UK is gridlocked; data centres are ready to build, developers are eager to be operational and yet the physical grid can’t handle the demand. Now, 2026 is becoming purgatory; you’re in limbo with no certainty on when you can get a power connection.

Bypassing the queue with batteries

Data centres are using batteries as a buffer, requesting a smaller connection to the grid rather than a huge high-voltage pipe of electricity and procuring a bunch of on-site batteries to store energy. The trick is that the infrastructure takes little sips from the grid overnight when energy demand is low, fills up those gigantic on-site batteries and uses stored power to run heavy-duty AI servers during the daytime.

The UK has strict grid queue rules that are known as the Gate 2 milestones and these uphold the rules that if you can’t prove your project is progressing rapidly, then you’re out on your ear and out of the nightclub.

Having batteries and an energy storage strategy becomes the secret advantage; having them on-site ensures the infrastructure uses a less disruptive, smaller connection and that can fast-track their applications.

Grid-smart era

Data centres can’t afford to be passive energy gluttons with a huge appetite; it’s time for them to get energy smart and, therefore, grid smart. You don’t need a huge budget to be a fast-growing data centre with all the power you need – it’s not going to be the ones with the biggest budget that “win” the UK AI boom, it’s the operators that have a strategic plan to use smart battery storage to solve their own power problems instead of sitting on their backsides in the queue.