Energy: Storage
The question
To ask the Secretary of State for Energy Security and Net Zero, what assessment she has made of the contribution that ultra-long duration energy storage could make to reducing household exposure to wholesale energy price volatility.
Answered by Department for Energy Security and Net Zero
All forms of electricity storage have an important role to play in decarbonising the power sector by storing cheap renewable energy for use when it is most needed. Analysis by LCP Delta and Regen, published by DESNZ in January 2024, demonstrates that long duration electricity storage (LDES) reduces wholesale energy price volatility. A recent paper from the UK Energy Research Centre explains that ultra-long duration storage has significant system value and can reduce the energy system’s reliance on expensive gas, often used during periods of low wind and sun. In August 2026, £28 million of government funding was made available to support the development of ultra-long duration storage to supply electricity for 100 hours or more.
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