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. During June, households, companies, and developers added 27,391 systems, resulting in 132 megawatts of new capacity. Authorities may update these provisional figures as further project data becomes available in the national database. This total encompasses domestic rooftops, commercial sites, and utility-scale solar farms.
June ranks as the second-best month for installation activity in the UK data series. March 2026 remains the record month, with 28,782 systems installed. Over the year leading to June, solar capacity grew by 2.2 gigawatts, marking a 10.9% increase. In 2025, the market installed about 269,000 systems—the highest annual total recorded. Smaller rooftop arrays accounted for most of the installations, while larger projects contributed significantly to the added capacity.
Focus now shifts to the plug-in solar regulations set to take effect on August 27, 2026. These rules permit approved microgenerators to connect via a standard UK plug and household socket. Eligible products are limited to a maximum of 800 watts of alternating current output. They must conform to Interim Product Specification version 2 and operate safely within the local distribution network. The regulations exclude plug-in batteries and devices that store electricity imported from household circuits.
Safety standards regulate plug-in connections
This legal revision updates 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 introduces a narrow exception to existing restrictions on plugs used with generating equipment. A notified body must verify that each plug meets the relevant BS 1363 standards. Product approval applies throughout the UK, while the electricity safety changes cover England, Wales, and Scotland.
The interim specification defines requirements for electrical design, mounting systems, fire safety, labeling, and user instructions. A technical study tested representative plug-in solar products on domestic wiring under controlled conditions. Researchers observed stable operation and found no sustained unsafe energization or thermal hazards. Differences in export control, electromagnetic compatibility, and overall product quality were also identified. These insights helped shape the UK-specific safety standard for market approval.
Retailers prepare for certified products
The government’s consultation garnered 466 responses from businesses, experts, regulators, and the public. Over 85% of participants supported the interim specification, with most also backing the plug-related amendments. Stakeholders included manufacturers, installers, network operators, electricians, academics, and consumer groups. Some raised concerns about older household wiring, noncompliant online products, and the need for clear instructions. Others emphasized distinguishing plug-in solar panels from plug-in battery systems.
Retail chains such as B&Q, Currys, Amazon, and Lidl are preparing to offer products under the new category. These systems serve households that cannot install traditional rooftop panels, including renters and residents with balconies or outdoor space. Systems using the new connection method cannot operate legally before August 27. Starting on that date, only approved products within the 800-watt limit may connect through a standard household socket. The capacity total of 22.8 GW at the end of June does not account for systems utilizing the new plug-in framework.