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Written Question
Heat Batteries: Housing
Monday 28th April 2025

Asked by: Margaret Mullane (Labour - Dagenham and Rainham)

Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what recent assessment he has made of the potential contribution of heat battery technology to the Government’s target for decarbonising homes by 2030.

Answered by Miatta Fahnbulleh - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)

Heat batteries are a promising low-carbon heating technology because they utilise time-of-use tariffs and do not require outside space. However, they are less efficient than heat pumps and therefore use more energy to meet the same heating demand. Although they can be charged at off-peak times, if not sized or used correctly, heat batteries could add to peak demand on the electricity network and increase bills for property owners. The Department is exploring, through studies like the Homes for Net Zero Trial, the role heat batteries could play in the future.


Written Question
Heat Batteries: Energy Supply
Monday 28th April 2025

Asked by: Margaret Mullane (Labour - Dagenham and Rainham)

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 contribution of heat batteries to balancing grid demand during peak energy usage periods.

Answered by Miatta Fahnbulleh - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)

Heat batteries are a promising low-carbon heating technology because they utilise time-of-use tariffs and do not require outside space. However, they are less efficient than heat pumps and therefore use more energy to meet the same heating demand. Although they can be charged at off-peak times, if not sized or used correctly, heat batteries could add to peak demand on the electricity network and increase bills for property owners. The Department is exploring, through studies like the Homes for Net Zero Trial, the role heat batteries could play in the future.


Written Question
Social Rented Housing: Energy
Wednesday 5th March 2025

Asked by: Margaret Mullane (Labour - Dagenham and Rainham)

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 accelerate (a) retrofit and (b) home upgrades for social housing residents.

Answered by Miatta Fahnbulleh - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)

The Government’s Warm Homes Plan will improve the existing housing stock by tackling fuel poverty and ensuring lower energy bills for decades to come. The Autumn 2024 Budget confirmed an initial £3.4 billion for heat decarbonisation and household energy over the next three years. This includes £1.8 billion to support fuel poverty schemes, with £1.29 billion of grant funding allocated to Wave 3 of the Warm Homes: Social Housing Fund in England to support social housing providers and tenants, with delivery starting in April 2025.