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 implications for his policies of the potential role of heat batteries in homes that are unsuitable for a heat pump.

Though heat batteries can utilise time-of-use tariffs, do not require outside space and can be cheaper to install, they are less efficient than heat pumps. If heat batteries do not have sufficient storage capacity, they could draw electricity at peak times, adding burden on the electricity network and increasing energy bills.

The Department is building our evidence on heat batteries through studies like the Homes for Net Zero Trial.

The Government is analysing responses to the consultation on the Boiler Upgrade Scheme, which gathered views on supporting alternative electric heating technologies, such as heat batteries.