Europe installed 36 GWh of new battery energy storage systems in 2025, pushing total operational capacity beyond 100 GWh for the first time — enough to power roughly 75 million homes. But as the bloc races toward a renewable energy share estimated to reach around 69 per cent four years from now and 80 per cent by 2050, questions are emerging about whether grid operators can manage millions of distributed batteries without triggering the blackouts they're meant to prevent.
The concern sharpened after The Telegraph published an article headlined "Britain's battery boom 'risks overwhelming the grid'" and said back-up systems supporting wind power could trigger "the blackouts they are trying to avoid." That article followed a recent report from the Panel of Technical Experts, an advisory group of independent consultants appointed by the UK government to advise on technical aspects of electricity market reform.
The Modelling Gap
The report said: "The PTE continues to consider that some thought needs to be given to the way BESS is likely to behave in a Capacity Market Notice (CMNs) situation, as storage may then have an incentive to charge in advance to fulfil their CM obligations." It added: "This may result in a fast descent into a stress event. This additional demand may need to be more explicitly modelled when estimating the peak demand in a stress event."
A CMN is a signal four hours in advance that there may be less energy generation available than system operators expect they will need to meet national demand. The report didn't say batteries will destabilise the grid and didn't explicitly express concern over blackouts. It said only that modelling is needed on how batteries react to a CMN.
Fears that batteries could trigger blackouts across Europe mainly revolve around the fact that grid operators can't see and can't control lots of small, distributed installations. If they all operate in unison, they'd be difficult to manage.
Adrian Hiel, director of the Electrification Alliance, said: "This is the same challenge we have been managing with solar power for the last 20 years." He said: "We have steadily gotten better and better at ensuring that [installations] improve the grid rather than harm it. Realistically this only becomes a blackout risk if we ignore the fact that we are installing millions of batteries annually. No one is interested in doing that."
The Storage Imperative
Europe already wastes millions of euros worth of wind and solar energy because grid systems can't absorb all the power generated, and because renewables are inflexible. When supply outstrips demand, negative electricity prices can follow. Many experts have identified battery energy storage systems, or BESS, as a solution. Batteries can store electricity produced by renewables during the day, when consumption tends to be low, and release it to households when demand rises in the evening.
SolarPower Europe said: "Across Europe, battery storage is helping integrate growing volumes of renewable energy, strengthen energy security and improve power system resilience." It added: "As the continent seeks to reduce its dependence on costly fossil fuel imports, accelerate electrification and meet its climate goals, storage can no longer be viewed as a supporting technology. It is becoming a strategic asset, instrumental to strengthening Europe's resilience, competitiveness and energy sovereignty."
Hiel said the main solution is better modelling, which would allow grid operators to anticipate how battery fleets behave in certain situations. He said: "We can expect relatively large margins of error in their modelling in the next couple of years but then the models will get more and more precise and accurate – just as they did with modelling how rooftop solar will behave." He added: "The other solution for managing batteries on the grid will be aggregating control by a third party. So instead of a household managing how their individual battery operates, a company will bring together tens or hundreds of thousands of batteries and run them for the maximum household value and the maximum grid benefit."
Cost and Competitiveness
An industry voice quoted in the article said batteries are very expensive, but no data was provided to back that up. The International Energy Agency says average battery costs have plummeted by 90 per cent since 2010 because of advances in chemistry and manufacturing. A recent report from energy think-tank Ember found that by 2030, utility-scale batteries could deliver short-term flexibility in the EU at 20 per cent lower cost than new gas plants. It also found that in the next four years, EU batteries could deliver in a single hour more than 80 per cent of the power that all EU gas power plants combined can generate in the same period.
Beatrice Petrovich, a senior energy analyst at Ember, said: "Clean flexibility is here." She added: "Rapid growth in batteries, EV smart charging and heat pumps can reduce reliance on gas for grid balancing and ease grid strain. The task now is not innovation but execution: remove barriers, reward flexibility and scale these solutions fast enough to avoid locking in unnecessary fossil backup."
Hiel said this idea is already being rolled out with smart electric vehicle charging in many countries and described it as a logical next step for batteries too, because it would let a grid operator contact the battery aggregator to either start consuming quickly, by charging, or start discharging quickly to meet sudden demand increases. Hiel also said: "Batteries are going to be a much bigger help to the grid than hindrance."
The Telegraph interviewee suggested that potential cost barriers and blackout risks mean countries should halt the clean energy transition and keep relying on fossil fuels. Hiel rejected that argument, saying: "Claiming that we shouldn't build intermittent generation because of this tiny risk from batteries is a bit like telling a morbidly obese person that they shouldn't lose weight because they will have to buy new clothes." He added: "The inconvenience of managing the impact of these millions of batteries is infinitesimally small compared to the benefits of maximising the cheapest sources of energy the world has ever known at a time when the countries who sell us gas talk about dominating Europe energetically and threaten to withhold that gas if we don't do as they say."
The UK's Department of Energy Security and Net Zero refused to comment when asked whether it was concerned about blackouts from the battery boom. It didn't answer questions from Euronews Earth and instead provided the same quote it gave to The Telegraph. A spokesperson said: "Our capacity market ensures security of supply while providing value for money for consumers." The spokesperson added: "We've cut VAT on electricity to give families breathing space and our focus is working to bring bills down for good."
Why This Matters:
Europe's energy transition depends on solving the intermittency problem: wind and solar generate power when nature permits, not when households need it. Battery storage offers a market-driven solution that could save the millions of euros currently wasted when renewables overproduce. But the technology is scaling faster than grid operators can model its behaviour, creating a gap between deployment and control. The UK government's technical advisers have flagged this gap — not as an immediate crisis, but as a modelling challenge that needs attention before millions more batteries come online. For European competitiveness, the stakes are clear: batteries could deliver flexibility at 20 per cent lower cost than new gas plants by 2030, but only if regulators can manage distributed installations without compromising grid stability. The alternative — slowing the transition to avoid coordination challenges — would lock Europe into dependence on fossil fuel imports at a time when energy sovereignty is a strategic imperative.