UK legislation — SI 2026/848
Commencement, territorial extent and the legal definition of a plug-in microgenerator.
Checked 14 September 2026Sources and official guidance.
The legislation, technical documents and consumer guidance used across this site.
How to use this page
Start with the official documents for the rule or safety question you are checking. For a product, use the manufacturer link on its product page as well as the ENA device register.
PRIMARY SOURCES
Law and government policy
The legal change, its scope and the government’s published response.
GOV.UK — Plug-in solar comes to market
Announcement published 26 August 2026, referring to commencement on 27 August.
Checked 14 September 2026DESNZ — Consultation outcome
Government response and current specification. The earlier consultation draft is withdrawn.
Checked 14 September 2026PRIMARY SOURCES
Product and network requirements
The technical specification, safety study and network rules behind the consumer guidance.
DESNZ — Interim Product Specification, version 2 (July 2026)
Final specification: output limits, mounting, electrical protection, documentation and battery exclusions.
Checked 14 September 2026DESNZ — Plug-in solar electrical safety study
Laboratory tests and modelling that informed the UK product and safety requirements.
Checked 14 September 2026Ofgem — G98 plug-in microgeneration decision
One device per customer installation, existing generation and network notification.
Checked 14 September 2026PRIMARY SOURCES
Checks and registration
The practical steps to take before buying and after installing a system.
Energy Saving Trust — Checks before you buy
Consumer guidance linked by GOV.UK, including permissions and registration.
Checked 14 September 2026ENA Connect Direct — LCT Device Register
The device register Energy Saving Trust advises buyers to check for the exact model.
Checked 14 September 2026UK Plug-In Solar Registration
The registration service linked by Energy Saving Trust for notifying an installation or decommissioning.
Checked 14 September 2026PRIMARY SOURCES
Data and calculators
The live grid data and location-based solar tool referenced on this site.
NESO — Carbon Intensity API
The official live data source used for the Great Britain grid-intensity panel on our home page.
Checked 14 September 2026European Commission Joint Research Centre — PVGIS
A separate location-based performance tool. Our simple calculator does not query or reproduce PVGIS data.
Checked 14 September 2026Product information
Every product profile links to the manufacturer information we used and gives the date it was checked. A manufacturer page can confirm specifications or stock, but it does not by itself prove that a complete product meets every UK requirement.
Government material is reused under the Open Government Licence where applicable. Photography licences are listed on the image credits page.