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 approximately 2.076 million installations nationwide. During June alone, households, companies, and developers contributed 27,391 new systems, adding 132 megawatts of capacity, with provisional figures subject to revision as more project data is integrated into the national database. These figures encompass residential rooftops, commercial facilities, and utility-scale solar farms.
June was the second most active month for solar installations in the UK data series, with March 2026 holding the record at 28,782 systems installed. Over the course of the year leading up to June, the total solar capacity grew by 2.2 gigawatts, representing a 10.9% increase. The year 2025 saw the addition of roughly 269,000 systems—the highest annual total ever recorded—with smaller rooftop arrays dominating the installation count, while larger projects contributed significantly to the growth in total generating capacity.
All attention now shifts to the upcoming plug-in solar regulations set to take effect on August 27, 2026. These rules permit approved microgenerators to connect through a standard UK plug and household socket, with qualifying products capable of providing a maximum of 800 watts of alternating current output. The devices must comply with Interim Product Specification version 2 and operate safely with the local distribution network, although plug-in batteries and devices that import electricity from household circuits are explicitly excluded from the scope of these regulations.
Safety standards regulate plug-in connections
The legislative update revises the Plugs and Sockets Safety Regulations 1994 along with the Electricity Safety, Quality and Continuity Regulations 2002. The statutory instrument was received by UK Parliament on July 17, just one day after ministers approved it. This amendment introduces a specific exception to the existing restrictions on plugs used for generating equipment, requiring a notified body to verify each plug’s compliance with the relevant BS 1363 standards. While product approval applies uniformly across the UK, the electricity safety modification is applicable in England, Wales, and Scotland.
The interim specification outlines technical requirements covering electrical design, mounting systems, fire safety, labeling, and consumer instructions. A dedicated technical study tested representative plug-in solar products on domestic wiring under controlled conditions, with the results indicating stable operation, no sustained unsafe energization, and no unacceptable thermal effects. Differences in export controls, electromagnetic compatibility, and overall product quality emerged from the testing, providing crucial data that influenced the UK-specific safety standard necessary for market entry.
Retailers prepare for the approved product launch
The government’s consultation process garnered 466 responses from businesses, industry experts, regulators, and the general public. More than 85% of these respondents expressed support for the interim specification, with many also endorsing the plug regulation changes. Participants ranged from manufacturers, installers, and network operators to electricians, academics, and consumer organizations, some of whom highlighted issues like outdated household wiring, noncompliant online products, and the need for clear, accessible instructions. Several called for clear differentiation between plug-in solar panels and plug-in battery systems.
Major retailers such as B&Q, Currys, Amazon, and Lidl are actively preparing for the new product category. The new connection format is aimed at households unable to install traditional rooftop systems, including some renters and residents with balconies or outdoor spaces. Systems utilizing the new plug-in connection will not be legally operational before August 27; from that date onward, only approved products with an 800-watt limit will be permitted to connect through a standard household socket. Notably, the total capacity recorded in June does not account for systems that will utilize the new plug-in framework.