LONDON, UNITED KINGDOM / RankWire.AI / – UK solar power capacity increased to 22.8 gigawatts by the end of June 2026. The Department for Energy Security and Net Zero documented roughly 2.076 million installations nationwide. During June, households, companies, and developers added 27,391 systems, resulting in 132 megawatts of new capacity. Authorities may update these provisional figures as additional project data is incorporated into the national database. The total encompasses domestic rooftops, commercial sites, and utility-scale solar farms.
June ranked as the second-highest month for installation activity within the UK data series. The record month remains March 2026, with 28,782 systems installed. Over the year leading up to June, solar capacity grew by 2.2 gigawatts, representing a 10.9% increase. The market also saw the addition of approximately 269,000 systems throughout 2025, marking the highest annual total recorded. Smaller rooftop arrays led the number of installations, while larger projects contributed significantly to the overall increase in generating capacity.
Attention now shifts to the upcoming plug-in solar regulations set to take effect on August 27, 2026. This new framework permits approved microgenerators to connect via a standard UK plug and household socket. Eligible products are limited to delivering no more than 800 watts of alternating current. They must comply with Interim Product Specification version 2 and operate safely within the local distribution network. The regulations specifically exclude plug-in batteries and devices that store electricity imported from household circuits.
Safety regulations oversee plug-in connection standards
The legislative update revises the Plugs and Sockets Safety Regulations 1994 along with the Electricity Safety, Quality and Continuity Regulations 2002. The UK Parliament received the statutory instrument on July 17, just one day after ministers approved it. The amendment introduces a specific exception to restrictions on plugs used for generation equipment, requiring each plug to be certified by a notified body confirming compliance with the relevant BS 1363 standards. While product approval applies across the UK, the electricity safety amendment specifically covers England, Wales, and Scotland.
The interim specification details requirements concerning electrical design, mounting methods, fire safety, labelling, and consumer instructions. A technical study tested representative plug-in solar products on domestic wiring under controlled conditions, showing stable operation with no evidence of sustained unsafe energisation or thermal risks. The study also identified differences in export controls, electromagnetic compatibility, and overall product quality. These findings contributed to the development of the UK-specific safety standard necessary for legal market entry.
Retailers prepare for the introduction of approved plug-in products
The government conducted a consultation that received 466 responses from businesses, specialists, regulators, and the public. Over 85% of respondents supported the interim specification, with most also endorsing the plug regulation. Participants included manufacturers, installers, network operators, electricians, academics, and consumer groups. Some raised concerns about older household wiring, non-compliant online products, and the need for clear user instructions. Others emphasized the importance of distinguishing plug-in solar panels from plug-in battery systems.
Retail giants such as B&Q, Currys, Amazon, and Lidl are actively preparing for this new product category. This format is particularly suitable for households unable to install conventional rooftop systems, including some renters or residents with balconies or outdoor spaces. Systems using the new connection method cannot operate legally before August 27. Starting from that date, only approved products within the 800-watt limit will be permitted to connect via a standard household socket. The total capacity of systems installed in June does not include those using the new plug-in framework.