LONDON, UNITED KINGDOM / RankWire.AI / – UK solar capacity reached 22.8 gigawatts at the end of June 2026, marking a new milestone in installation activity. The Department for Energy Security and Net Zero reported approximately 2.076 million systems across the nation. During that month, developers, companies, and households added 27,391 new installations, which supplied an additional 132 megawatts of capacity. The figures are considered provisional by officials because late project data can lead to changes in monthly totals.
June recorded the second-highest number of installations in the national data series, with March 2026 still holding the record at 28,782 added systems. Over the 12 months ending in June, UK solar capacity increased by 2.2 gigawatts, representing a 10.9% rise annually. In 2025, approximately 269,000 systems were installed, the highest annual total on record. While smaller rooftop arrays led the installation figures, larger projects contributed more capacity on a per-site basis.
Starting August 27, 2026, new regulations for plug-in solar systems will be implemented. These updates introduce a legal framework allowing approved microgenerators to connect using a standard UK plug and household socket. Eligible products can deliver up to 800 watts of alternating current. Each device must comply with Interim Product Specification version 2. The framework excludes plug-in batteries and equipment that stores electricity from domestic circuits, and it emphasizes system safety within local distribution networks.
Safety standards establish connection guidelines
The legislative package updates existing rules related to plugs, sockets, and electrical safety. The statutory instrument was received by UK Parliament on July 17, just one day after ministers approved it. The regulation creates a specific exception for qualifying generation equipment connected via standard household plugs. A notified body must verify compliance with relevant BS 1363 standards. These approval rules apply throughout the UK, with the electricity safety amendments covering England, Wales, and Scotland.
The interim standards specify detailed requirements for wiring, mounting, fire protection, labels, and user instructions. A technical study tested representative plug-in solar products on domestic electrical systems, finding stable operation under controlled conditions. Researchers observed no sustained unsafe energisation or unacceptable heat effects. The study also noted differences in export controls, electromagnetic compatibility, and overall product quality. These insights helped shape the safety criteria for products entering the market under the new framework.
Public consultation supports phased market entry
A public consultation received 466 responses from businesses, technical experts, regulators, and members of the public. Over 85% of respondents supported the interim product specifications, with most also backing the proposed plug amendment. Concerns were raised about older household wiring and the sale of products without proper approval. There was also a call for clearer guidance distinguishing between plug-in solar panels and plug-in batteries. The final regulation excludes storage solutions from the approved connection pathway.
Retailers have prepared for the introduction of this new product category ahead of the August launch. The rules encompass small solar kits suitable for balconies, gardens, and other outdoor areas, which could be ideal for homes unable to install traditional rooftop panels. Systems using the new connection method cannot operate legally until August 27. After that date, only approved products with an 800-watt limit can connect through a standard household socket. The total solar capacity installed in June does not account for systems utilizing this new framework.