The UK leads Europe on grid-scale batteries – now the EU wants to close the storage gap

Britain may lead Europe in grid-scale battery capacity, but the European Union is now attempting to turn storage into a more coordinated infrastructure priority.

The EU's first tripartite agreement dedicated to energy storage was signed on June 26, bringing together governments, developers, manufacturers, energy-consuming industries and financial institutions. Its immediate objective is to deploy approximately 45 GW of storage between 2026 and 2028, with the Commission estimating that around 200 GW could be required by 2030. The bloc had roughly 55 GW installed at the beginning of 2026.

While those figures should not be compared directly with Britain’s battery fleet, since the EU agreement covers a wide range of storage technologies – it does highlight the need for the European Union to diversify. Of the 55 GW of energy storage already available across the bloc, 46 GW of that is pumped-storage hydropower. 

The latest agreement will see the EU explore battery energy storage systems, more pumped hydro, thermal storage, flow batteries and other flexible assets. This is where it could potentially learn from the UK, which holds a clear lead specifically in grid-scale batteries. 

The UK Government's July 2026 Clean Flexibility Roadmap update noted that capacity reached 7.5 GW by the end of 2025, with a record 2.3 GW energised during that year, and describes the UK as continuing to have the greatest capacity in Europe.

To help it grow its energy storage capacity, the EU is asking member states to remove barriers to storage accessing markets and earning revenue across different system services, while supporting network tariffs that encourage flexible and grid-friendly operation. The Commission has also committed to updating generator and demand connection codes to support storage deployment. Seventeen EU countries have already submitted storage pledges for 2026 to 2028, with another five expected to do so by the end of the year, although the commitments are not legally binding.

It reflects a similar approach to the UK. The Clean Power 2030 Action Plan sets a range of 23-27 GW of battery capacity and 4-6 GW of long-duration electricity storage by 2030. On the same day the EU agreement was signed, Ofgem provisionally selected 16 long-duration storage projects for cap and floor support, representing 7.6 GW and 137 GWh across pumped hydro, compressed air, lithium-ion and vanadium flow battery technologies. Final decisions are expected following consultation in autumn 2026.

For the UK, however, the challenge is increasingly one of delivery rather than ambition. DESNZ and Ofgem said in April that battery projects progressing to Gate 2 were already 14.8 GW above the top of the Clean Power 2030 battery range for 2030.

That is a sizable pipeline, but installed capacity only tells part of the story. The Government's own flexibility roadmap makes clear that storage assets also need to be used efficiently. In practice, that brings the focus back to where projects connect, how they are co-located and metered, and whether controls and dispatch arrangements allow them to respond when the system actually needs flexibility.

The EU is now trying to accelerate storage deployment across 27 national energy systems. Britain already has a head start on grid-scale batteries. The harder task is proving that lead translates into useful, operational flexibility rather than simply more capacity waiting in the connection queue.