Written Question·Department for Energy Security and Net Zero·UIN 119673

Heat Batteries

Tabled: 10 March 2026
Answered: 18 March 2026

Question

Lorraine Beavers

LabourBlackpool North and Fleetwood

To ask the Secretary of State for Energy Security and Net Zero, what assessment he has made of the potential impact of thermal energy storage within heat networks on the (a) need for grid reinforcement and (b) operation of the electricity system.

Answer

Martin McCluskey
The Department has not yet made a full quantitative assessment of the flexibility benefits of thermal energy storage within heat networks. The electricity distribution network benefits of heat networks has been estimated at between £5 to 7bn in avoided co...

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