AI Data Centres
Great Britain is a windy place. Scotland and the North West of England have some of the strongest wind resources in Europe, contributing a huge share of the UK’s renewable energy capacity. And while we might not match Spain for sun, 2025 was a record year for wind and solar electricity, with wind generating nearly 30% of Great Britain’s electricity and solar over 6%.
But here’s the catch: a lot of this energy is wasted. That’s partly due to our ageing grid infrastructure struggling to move power from where it’s generated to where it’s needed, particularly when supply peaks. It’s also because the grid has to stay balanced, meaning supply cannot exceed demand. This often leads to curtailment, when wind and solar generators are asked to switch off even though they could produce electricity.
But what if we could put that excess renewable energy to good use? Well, that’s where data centres come in… and yes, the very same facilities often criticised for being power-hungry could actually be part of the solution.
Renewables aren’t living up to their potential
Scotland is the powerhouse for renewables in Britain, but most energy demand is far away in London. With an ageing grid and delays in new infrastructure, it isn’t always possible to transfer all that power. When generation exceeds demand, the National Energy System Operator (NESO) pays generators to switch off, and the cost is passed to consumers.
For example, in 2024, Seagreen, Scotland’s largest wind farm, was paid £65 million to limit output 71% of the time. On a larger scale, in 2025 across Northern Scotland, only 63% of potential wind energy reached the grid, with the cost of switching off generation amounting to over £116 million. And in Great Britain as a whole, over £1.45 billion was spent in 2025 on switching off wind turbines. NESO warns this could rise to nearly £8 billion annually by 2030 if nothing changes, with the expense ultimately passed on to consumers.
Data centres: the grid’s unexpected ally?
Data centres are infamously power hungry. By 2030, Europe’s data centre consumption is expected to hit over 150 TWh, that’s more than enough energy to power every home in the UK for a year. But being hungry for power is not necessarily a bad thing if it is directed where it is needed.
Location is everything. Placing data centres in regions with excess renewable generation, like Scotland, allows them to consume energy that would otherwise be wasted. Meanwhile, areas like London, with almost 9 million people, do not need more data centres consuming energy; there’s enough demand as is.
Data centres can be a source of flexible demand by adjusting their energy usage depending on supply. During high grid stress, they can reduce demand, a process known as peak shaving. When renewable generation is high, they can ramp up consumption, soaking up excess energy that might otherwise be curtailed.
It is like going to an all-you-can-eat buffet. You take what is available when it is abundant and slow down when the kitchen is running low. Everyone ends up happy.
How data centres become flexible
Flexibility starts with behind-the-meter solutions like microgrids, on-site generation, and advanced battery storage. Ultra-fast batteries are a game changer here, and companies like Nyobolt are leading the way. Their systems can handle rapid load spikes while retaining 80% capacity after 25,000 cycles, far beyond what standard lithium-ion can manage. This allows data centres to switch to battery power during peak demand, stabilise consumption, and reduce reliance on the grid while still taking advantage of excess renewable energy when it’s available.
With this kind of technology, flexible data centres can work hand in hand with network operators. By strategically locating facilities in areas prone to curtailment, they can absorb surplus renewable energy, boosting grid utilisation. And with renewable projects in regions like Scotland expected to triple capacity if proposals go ahead, aligning demand with supply is crucial; otherwise, wasted energy will climb and future investment could stall.
Turning wasted energy into opportunity
By combining location strategy with flexible energy use, data centres can help unlock Britain’s renewable potential. They transform from perceived energy gluttons into critical enablers of grid stability. They reduce waste, support further renewable investment, and ensure the UK’s grid can handle growing demand without turning off turbines that could be powering homes, businesses, and even AI systems. For it is the right mix of power, location, and technology that could make data centres exactly what the grid needs to finally make the most of its renewable energy.
