Independent reference site. Not a government website and not affiliated with any government department, network operator or utility.Rules checked 14 October 2026
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UK guide

Is plug-in solar legal in the UK?

Yes—in England, Wales and Scotland, compliant plug-in solar is allowed under rules in force since 27 August 2026. The limit is 800 W AC output, and the product must meet the government’s Interim Product Specification. Northern Ireland has different connection requirements, so the same answer does not apply across the whole UK.

When did the rules change?

The regulations came into force on 27 August 2026, following the government’s announcement on 24 March 2026. DESNZ published its consultation on the government website on 16 June 2026, and it closed on 30 June 2026. The consultation covered changes to the plug rules and the proposed Interim Product Specification.

DESNZ published its consultation response on 16 July 2026, after receiving 466 responses. SI 2026/848 was made on 16 July 2026 and laid before Parliament on 17 July 2026, according to legislation.gov.uk. Those dates mark the making and presentation of the regulations, not their start date.

The law refers to the Plug-in Solar Device Interim Product Specification, version 2, published on 16 July 2026. DESNZ describes this specification as setting the minimum technical and safety requirements for plug-in solar devices. The August change therefore created a route for compliant products, rather than permission to plug in any solar kit.

What do the rules allow?

The rules allow a compliant solar microgenerator with a maximum rated AC output of no more than 800 W. SI 2026/848 defines it as generating electricity directly from sunlight, connecting through a standard plug and socket, and operating in parallel with the distributor’s network. The 800 W limit is AC output, not the panels’ DC rating.

The plug amendment allows a notified body to approve a standard BS 1363 plug for this specific use. It addresses the standard’s restriction on connecting generating devices to sockets; the plug must otherwise conform to BS 1363. Separately, the installation and operation amendment says a plug-in microgenerator must not be installed or operated unless it complies with the Interim Product Specification.

This route is for plug-in solar without batteries, not plug-in batteries or solar devices integrated with battery systems. The legal definition excludes devices designed to import electricity from your home for storage and later supply, apart from permitted control or auxiliary functions. The specification also expressly excludes battery-integrated solar products, so an 800 W rating alone does not bring them within these rules.

  • Maximum apparent power supplied to the mains installation: 800 VA.
  • Maximum current: 3.5 A.
  • Only one plug-in solar product per household final ring circuit.
  • Above 960 W total panel maximum power, manufacturers must advise you to consider professional assessment of your existing electrical installation.

Do these rules cover Northern Ireland?

The plug approval changes extend to Northern Ireland, but the installation and operation amendment does not. Legislation.gov.uk states that Regulations 1 and 2 extend to England and Wales, Scotland and Northern Ireland. Regulation 3, which amends the Electricity Safety, Quality and Continuity Regulations, extends only to England and Wales and Scotland.

The Interim Product Specification also identifies a separate Northern Ireland position. It says Engineering Recommendation G98 applies to Great Britain, while Northern Ireland’s connection requirements are set out in G98/NI. Its application to Northern Ireland remains subject to further consideration and may require amendment, so do not treat the Great Britain change or a register entry as establishing permission to connect there.

What should you check before buying?

Check the exact product’s compliance status, not just its advertised wattage or brand. DESNZ says products must include a declaration of compliance and be listed on the Energy Networks Association G98 Type Test Register. Start with the approved kits page to compare register entries and their status.

An entry on the register is not automatically a compliant entry. On 14 October 2026, the ENA register’s Plug-in Solar category contained 134 entries: 121 marked Compliant and 13 marked Non-compliant. Match the model and kit configuration you intend to buy to the relevant entry, and check its status.

DESNZ says only devices compliant with the Interim Product Specification can be sold in the UK and plugged in under the amended plug rules. A description such as “balcony solar” or “plug-and-play” does not establish that compliance. If you want a kit with an integrated battery, this particular approval route does not cover it.

Questions

Was plug-in solar legalised in August 2026?

SI 2026/848 came into force on 27 August 2026, creating a route for compliant plug-in solar in Great Britain. It was not blanket approval for every kit, and Northern Ireland is not covered by the same installation and operation amendment.

Is the 800 W limit for panels or the inverter?

The legal definition sets a maximum rated AC output of 800 W, rather than a panel DC limit. The Interim Product Specification separately limits apparent power to 800 VA and requires manufacturers to advise consideration of professional assessment when total panel maximum power exceeds 960 W.

Can I use a plug-in solar kit with a battery?

Battery-integrated solar devices are outside the Interim Product Specification’s scope. Plug-in batteries are also excluded, so the solar-only rule change should not be read as approval for those products.

Are approved plug-in solar products available in the UK?

The ENA register had 121 plug-in solar entries marked Compliant when checked on 14 October 2026. That establishes register status, not shop stock; check the exact product entry and the seller’s availability before buying.