The UK is on a bold path to decarbonise its energy system. With targets to reduce emissions by 68% by 2030 and 81% by 2035 compared to 1990 levels, the country is already over halfway there, having achieved a 53% reduction. But the next phase of this journey will demand more profound, systemic transformation – starting with how we power our homes, businesses and vehicles.
A central pillar of this transformation is the clean electrification of energy use. There has been a significant shift toward electric solutions: heat pump sales have quadrupled since 2020, EVs now make up one in five new passenger vehicle sales, and more than 1.4 million UK homes have solar PV on their rooftops.
This shift is not just about consuming cleaner power – it’s about making our energy use smarter and more responsive. As electricity becomes the backbone of decarbonised energy, ensuring that demand aligns with supply in real time will be critical.
Enhancing grid flexibility: The role of distributed energy resources
By 2030, up to 80% of the UK’s electricity could come from variable renewable sources like wind and solar. But these sources are, by nature, intermittent. When the wind drops or the sun doesn’t shine, clean energy becomes scarce – and prices spike. Without ways to align electricity demand with this fluctuating supply, the UK risks blackouts, price volatility and continued reliance on carbon-heavy backup generation.
This is where flexibility becomes vital. Flexibility means helping consumers reduce or shift their electricity use to match the availability of clean power. This keeps the grid balanced, lowers costs and avoids exposure to volatile fossil fuel markets. Crucially, this solution is key to delivering on the UK’s Clean Power 2030 Action Plan and achieving a fully decarbonised electricity system by the end of the decade.
By 2050, up to 20% of total UK electricity demand will need to be flexed each year to cope with daily and seasonal fluctuations in Variable Renewable Energy (VRE) output and rising power demand – and buildings will be critical to this equation. Even with a massive roll-out of grid-scale batteries, up to 16 gigawatts of flexible load could be harnessed from UK buildings. That’s around a quarter of peak UK power demand today.
Demand response: A smart, scalable solution
To unlock the full potential of flexibility, the UK must embrace Demand Response (DR) – a digital approach that automatically adjusts energy use without compromising comfort for property owners or tenants.
The latest evolution, known as “DR 4.0,” leverages automation, data and AI to synchronise millions of smart energy devices in real time with market signals. These small, seamless adjustments add up to significant benefits.
By shifting energy use away from periods of high prices and limited renewable supply, Demand Response reduces peak demand, eases pressure on the grid, brings down costs for all users and reduces CO₂ emissions.
What’s more, this can be achieved without costly retrofits. In many cases, consumers don’t pay for the equipment – thanks to some smart policy by Ofgem and the growing market of DR aggregators. In November 2024, the UK made a significant move by opening the wholesale power market to independent DR aggregators. This was a major step toward recognising the central role of demand-side solutions in enabling a resilient, affordable and sustainable energy future.
The importance of consumer engagement
However, the UK’s energy transition can’t be done without people. Thankfully, public awareness and willingness to engage with new energy solutions are growing – particularly after the 2022–2023 energy price crisis. Consumers want more control over their energy use. DR offers them just that: greater comfort, smarter devices and tangible savings, all while helping to cut carbon emissions.
Engaging consumers through clear incentives, seamless technology and trustworthy service providers is crucial. When done right, Demand Response empowers consumers as active participants in the energy transition.
Critical solutions, today
Demand Response is central to solving the famous “energy trilemma” of ensuring energy affordability, security and sustainability. By modulating energy demand during critical hours, it lowers power prices for all consumers and helps keep the lights on and decarbonise those “peak load” periods for the power grid.
It is a win-win-win.
