LONDON, UNITED KINGDOM / RankWire.AI / – UK solar power capacity reached 22.8 gigawatts at the close of June 2026. The Department for Energy Security and Net Zero recorded approximately 2.076 million installations nationwide. During June, households, businesses, and developers installed 27,391 systems, adding 132 megawatts of new capacity. Officials may adjust these provisional figures as additional project data becomes available in the national database. The total encompasses domestic rooftop arrays, commercial sites, and utility-scale solar farms.
June was the second-best month for installation activity in the UK data series, with March 2026 holding the record at 28,782 systems added. Over the year ending in June, solar capacity increased by 2.2 gigawatts, reflecting a growth rate of 10.9%. In 2025, the market saw the addition of approximately 269,000 systems, marking the highest annual total ever recorded. Smaller rooftop installations comprised the majority of the count, while larger projects contributed significantly to the overall growth in capacity.
The focus now shifts to the upcoming plug-in solar regulations that will come into force on August 27, 2026. These rules permit approved microgenerators to connect via a standard UK plug and household socket. To qualify, products must deliver no more than 800 watts of alternating current and comply with Interim Product Specification version 2, ensuring safe operation with the local distribution network. Importantly, the regulations exclude plug-in batteries and devices that store electricity imported from household circuits.
Safety standards regulate plug-in connections
The legal 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 creates a specific exception to existing restrictions on plugs used with generating equipment. A notified body must verify that each plug satisfies the relevant BS 1363 standards. While product approval applies across the UK, the electricity safety amendments cover England, Wales, and Scotland.
The interim specifications specify requirements related to electrical design, mounting systems, fire safety, labelling, and consumer instructions. A technical study tested representative plug-in solar products on domestic wiring under controlled conditions, confirming stable operation without unsafe energisation or thermal issues. The study also highlighted variations in export controls, electromagnetic compatibility, and overall product quality, which helped inform the UK-specific safety standard necessary for market approval.
Retailers prepare for the rollout of approved plug-in products
The government’s consultation attracted 466 responses from various stakeholders, including businesses, specialists, regulators, and the public. Over 85% of respondents supported the interim specification, with most also endorsing the plug regulation changes. Participants 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 urged authorities to clearly distinguish plug-in solar panels from plug-in battery systems.
Major retailers such as B&Q, Currys, Amazon, and Lidl are preparing for the new category of products. This format is aimed at households unable to use conventional rooftop systems, including some renters and residents with balconies or outdoor spaces. Systems utilizing the new connection method cannot operate legally before August 27. From that date onward, only approved products within the 800-watt limit can connect through a standard household socket. The capacity total for June does not include systems that will be connected using the new plug-in framework.