Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what assessment he has made of the potential impact of heat batteries on (a) peak electricity demand and (b) grid flexibility in the UK energy system.

Heat batteries are a promising technology because they utilise time-of-use tariffs and do not require outside space. However, they are also less efficient than heat pumps and will therefore use more energy to meet the same heating demand, which could impact peak electricity demand

The Department is exploring, through studies like the Homes for Net Zero Trial, the role heat batteries could play in the future.