IN Brief:
- DESNZ is consulting on proposals to enable safe and legal plug-in solar use in the UK.
- The consultation focuses on amendments to product safety rules and an interim product specification.
- The proposals cover plug-in solar systems without batteries that connect directly to a standard mains socket.
The Department for Energy Security and Net Zero has opened a consultation on proposals to enable the safe and legal use of plug-in solar products in the UK, potentially creating a new route for small-scale solar generation connected directly through a standard mains socket.
The consultation refers to the products as plug-in microgenerators, limited at this stage to plug-in solar systems without batteries. The proposed approach would amend the Plugs and Sockets etc. (Safety) Regulations 1994 and introduce an interim product specification while longer-term standards are developed.
Under the current regulatory position, plug-in solar products cannot be legally sold, supplied, or used in the UK because they cannot demonstrate compliance with existing product safety legislation and electrical installation rules. BS 1363 does not permit plugs and sockets to be used to connect electricity-generating equipment, while electrical installations must comply with British Standard requirements, principally BS 7671.
The consultation is designed to establish a transitional framework allowing compliant products to be placed on the market. The proposals do not cover small-scale wind, plug-in battery storage, or wider categories of plug-in microgeneration. Responses are being invited until 30 June 2026 through the GOV.UK plug-in solar consultation page.
The technical questions are concentrated around electrical safety, product compliance, installation practice, and distribution-network visibility. Plug-in solar has become more common in parts of Europe, especially Germany, where small balcony systems are widely used. The UK’s wiring rules, socket standards, and domestic installation practices make direct adoption more complex.
At the centre of the consultation is the question of how a generating device can be safely connected through socket-outlet infrastructure designed for loads. Product specification, anti-islanding protection, plug and socket design, RCD behaviour, circuit loading, labelling, user instructions, DNO notification, export visibility, and interaction with existing installations all require clear treatment.
The proposal also tests the boundary between products and installations. Where a product is marketed as user-installable, responsibility moves heavily toward design, certification, instructions, supply-chain control, and foreseeable misuse. Where site conditions determine safe operation, the distinction between plug-in appliance and electrical installation becomes harder to maintain.
Real properties vary widely. Ring final circuits, radial circuits, outdoor sockets, extension leads, multi-way adaptors, older wiring, damaged accessories, earthing arrangements, and unverified user modifications all create different risk profiles. A product specification can control the device, but it cannot guarantee the condition of every installation into which the device is connected.
Distribution-network visibility will also need a workable approach. Small generating systems behind the meter can affect local voltage, reverse power flow, network modelling, and fault behaviour. Individual devices may be limited, but high uptake across a feeder could change operating conditions. Registration, notification, data availability, and export limits therefore sit alongside product safety.
The consultation arrives as solar access is expanding beyond traditional owner-occupied rooftops. Shared solar systems for flats, including the SolShare 2 platform described in coverage of Allume’s multi-occupancy system, show a more structured route for buildings where individual roof ownership is not straightforward. Plug-in solar offers a different model, but both developments are part of the same push to widen access to distributed generation.
Excluding batteries from the first stage narrows the technical scope. Storage would introduce further questions around charging, discharge control, fire safety, export behaviour, islanding, installation location, and system coordination. A solar-only product specification remains complex, but it limits the number of operating modes requiring assessment.
The consultation process must align product standards, electrical safety rules, grid operation, and market access before products can be widely deployed. If plug-in solar moves into UK retail channels, the technical framework will need to avoid shifting hidden risk onto domestic circuits, installers, DNOs, and emergency responders.
Small-scale socket-connected solar could widen access to generation, but it cannot be treated as a conventional appliance. Once a product exports electricity into a domestic installation, it becomes part of the electrical system, and the rules need to reflect that from the outset.
