Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what steps his Department is taking to improve public awareness and consumer advice on the benefits of heat battery technology as part of the Government’s Warm Homes Plan.

Heat batteries are a promising technology because they utilise time-of-use tariffs, do not require outside space, and can be cheaper to install than heat pumps in some circumstances. However, they are also less efficient than heat pumps and will therefore use more energy to meet the same heating demand.

The Department is exploring, through studies like the Homes for Net Zero Trial, the role heat batteries could play in the future. We will continue to review our position on heat batteries as the supporting evidence base develops.