Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, what assessment he has made of the most popular models of (a) electricity and (b) heat microgeneration in buildings throughout the UK.

The Feed-in-Tariff (FIT) scheme supports solar, wind, hydro, anaerobic digestion and micro-combined heat and power technologies. On the basis of installations on Ofgem’s central FIT register, solar is the most popular method of electricity generation accounting for 99% of all installations (over 830,000) supported under the scheme.

The Domestic Renewable Heat Incentive (RHI) supports biomass only boilers and biomass pellet stoves, air source heat pumps, ground source heat pumps and solar thermal panels. The Domestic RHI has accredited over 69,000 applications for the residential microgeneration of heat. As of May 2019, air source heat pumps are the most popular method of heat microgeneration, making up 54% of total accredited applications. More deployment data can be found here.

It should be noted that there are some forms of microgeneration not covered by the RHI or FITs scheme.