Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what assessment his Department has made of the potential impact of battery enabled boilers could make on decarbonising domestic heating in smaller homes.

Heat batteries, sometimes referred to as ‘battery enabled boilers’, can utilise time-of-use tariffs and do not require outside space; however, they are less efficient than heat pumps. Heat batteries could meet the needs of some smaller homes, however if they do not have sufficient storage capacity they could draw electricity at peak times, adding burden on the electricity network and increasing energy bills.

Government will continue to review our position on heat batteries, as the supporting evidence base develops, including considering evidence from the Homes for Net Zero project.