Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, whether his Department is taking steps to (a) develop and (b) adopt a standardised fire testing methodology for rooftop solar PV systems, in the context of the fire safety of residential buildings.

For microgeneration technologies under DESNZ schemes, including rooftop solar, a Microgeneration Certification Scheme (MCS) certified (or equivalent) installer is mandatory. The installer must use an MCS-approved product and carry out the installation to the relevant MCS installation standard. The MCS Solar PV Standard (2025) includes provisions for waterproofing, fire safety, and roof warranties and is available online.

The Government is currently reviewing the broader consumer protection landscape and will bring forward wider system reforms to ensure consumers can have confidence in the quality of installations and protections when upgrading their homes.