LONDON, UNITED KINGDOM / RankWire.AI / – UK solar capacity hit 22.8 gigawatts by the end of June 2026, marking a new record for installations. The Department for Energy Security and Net Zero reported roughly 2.076 million systems nationwide. During the month, developers, companies, and households added 27,391 new installations, providing 132 megawatts of additional capacity. These figures are considered provisional, as late project data can alter monthly totals.
June saw the second-largest number of monthly installations in the country’s data record. The top month remains March 2026, with 28,782 systems installed. Over the year ending in June, UK solar capacity increased by 2.2 gigawatts, reflecting an annual growth rate of 10.9%. In 2025, about 269,000 systems were installed, the highest yearly total recorded. Smaller rooftop systems led installation numbers, though larger projects contributed more capacity per site.
New regulations for plug-in solar systems will be introduced on August 27, 2026. These rules establish a legal pathway for approved microgenerators using standard UK plugs and household sockets. Eligible products can deliver up to 800 watts of alternating current. Each device must meet the Interim Product Specification version 2. The regulations exclude plug-in batteries and systems that store electricity from domestic circuits. They also require systems to operate safely within local distribution networks.
Safety standards define connection guidelines
The legislation updates rules related to plugs, sockets, and electrical safety. The statutory instrument was received by UK Parliament on July 17, a day after ministers approved it. The regulation provides a limited exception for qualifying generation units connected via standard household plugs. A notified body must verify compliance with relevant BS 1363 standards. These product approval rules apply across the UK, covering England, Wales, and Scotland.
The interim standards specify detailed requirements for wiring, mounting, fire safety, labels, and user instructions. Researchers tested representative plug-in solar products on domestic electrical systems. The tests showed stable operation under controlled conditions. Researchers found no evidence of unsafe energisation or excessive heat effects. They did note differences in export controls, electromagnetic compatibility, and overall product quality. These findings informed the safety rules for products entering the market under the new regulations.
Public feedback supports cautious market introduction
A public consultation received 466 responses from businesses, technical experts, regulators, and the general public. Over 85% of respondents supported the interim product standards. Most also approved the proposed plug amendment. Concerns were raised about older household wiring and products sold without proper approval. Many asked for clearer guidance on the difference between plug-in solar panels and plug-in batteries. The final rules exclude storage devices from the approved connection method.
Retailers have prepared for the new category of products before the August deadline. The rules cover small solar kits suitable for balconies, gardens, and outdoor spaces. These may be ideal for homes unable to install traditional rooftop panels. Systems under the new scheme cannot operate legally before August 27. After that date, only approved products within the 800-watt limit can connect via a standard household socket. The capacity total for June does not include installations using this new framework.