LONDON, UNITED KINGDOM / RankWire.AI / – UK solar power capacity reached 22.8 gigawatts by the end of June 2026. The Department for Energy Security and Net Zero reported approximately 2.076 million installations nationwide. In June alone, households, businesses, and developers installed 27,391 new systems, adding 132 megawatts of capacity. These provisional figures may be updated as more project data is integrated into the national database. The total encompasses domestic rooftops, commercial sites, and utility-scale solar farms.
June marked the second-highest month for installation activity in the UK data series, with March 2026 remaining the record month at 28,782 new systems added. Over the year to June, solar capacity increased by 2.2 gigawatts, reflecting a growth rate of 10.9%. In 2025, the market installed about 269,000 systems, setting a new record for annual totals. Smaller rooftop arrays led the number of installations, while larger projects contributed significantly to the overall increase in power generation capacity.
Attention now shifts to the upcoming plug-in solar rules set to take effect on August 27, 2026. The regulation permits approved microgenerators to connect through a standard UK plug and household socket. To qualify, products must deliver no more than 800 watts of alternating current output. They are required to comply with Interim Product Specification version 2 and operate safely within the local distribution network. The rules exclude plug-in batteries and devices that store electricity imported from household circuits.
Safety standards regulate plug-in connections
This legal update amends the Plugs and Sockets Safety Regulations 1994 and 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 establishes a specific exception to the restrictions on plugs used for generating equipment. A notified body must verify that each plug complies with the relevant BS 1363 standards. Product approval applies across the UK, while the electricity safety update covers England, Wales, and Scotland.
The interim specification sets criteria for electrical design, mounting systems, fire safety, labelling, and user instructions. A technical study tested representative plug-in solar products on domestic wiring under controlled conditions, demonstrating stable operation and no sustained unsafe energisation or thermal risks. The study also identified differences in export controls, electromagnetic compatibility, and overall product quality, shaping the UK-specific safety standard for market approval.
Retailers prepare for approved plug-in products
The government’s consultation attracted 466 responses from businesses, specialists, regulators, and the public. More than 85% of respondents supported the interim specification, with most also endorsing the plug-in amendment. Participants included manufacturers, installers, network operators, electricians, academics, and consumer groups. Some highlighted concerns about older household wiring, non-compliant online products, and the need for clear instructions. Others emphasized the importance of distinguishing plug-in solar panels from plug-in battery systems.
Retailers such as B&Q, Currys, Amazon, and Lidl are preparing for the new product category. The format caters to households unable to install traditional rooftop systems, including renters and residents with balconies or outdoor spaces. Systems utilizing 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 through standard household sockets. The total capacity recorded in June does not include systems designed for the new plug-in framework.