The latest data from the Department for Energy Security and Net Zero (DESNZ) has revealed that over 22,000 energy storage systems were installed on domestic properties in the UK in the past 12 months.
For the period between April 2024 and March 2025, a total of 22,398 battery energy storage systems were added to UK homes. Of these, 9,855 had a storage capacity of between 1 and 5.99 kWh, 7,956 had a storage capacity of between 6 and 10.99kWh, and 4,587 had a capacity of between 11 and 29.99kWh. The total kWh capacity of all of the home battery installations over this period reached 193.39MWh.
The data, which includes all installations certified by the Microgeneration Certification Scheme (MCS), reveals that the installation cost per kWh declines significantly for those installing larger systems. For systems with a storage capacity between 1 and 5.99kWh, the median installation cost sits at £1,020 per kWh, with costs falling to £900 per kWh for systems between 6 and 10.99 kWh, and falling significantly to £590 per kWh for systems between 11 and 29.99kWh.
Notably, this data does not include installations on newbuild properties, something which is becoming increasingly common as housebuilders seek to make more energy efficient and environmentally friendly. Octopus Energy has been at the forefront of the movement to get more batteries into new build properties through its “Zero Bills” homes.
Zero Bills homes promise residents that they will not have to pay energy costs for at least five years after moving in, with all homes being fitted with a number of low carbon technologies, most significantly including home battery energy storage. The UK’s largest energy supplier has partnered with some of the UK’s biggest housebuilders, including Vistry Group, Thakeham, The Hill Group, Tilia Homes, and Hopkins Homes, in an effort to roll out 100,000 “zero bills” homes by 2030. The scheme recently rolled out into Scotland, where Octopus Energy has partnered with Homes for Scotland and MAST Architects.
Meanwhile, utility E.ON Next recently joined forces with distribution network operator (DNO) Northern Powergrid to trial a new scheme to lower energy bills through the use of home battery energy storage. The pilot will combine battery energy storage with flexibility services and improved home insulation, and all participants will be provided with free home batteries from E.ON Next when the pilot launches later this month.
