Is Plug-In Solar Legal in the UK? The Rules Since August 2026

Plug-in solar has been legal in England, Scotland and Wales since 27 August 2026. You may buy and plug in a solar kit with up to 800 W of AC output, as long as it complies with the government’s Plug-in Solar Device Interim Product Specification and is listed as compliant on the Energy Networks Association (ENA) Type Test Register. One device per household, no battery, and you notify your network operator. Northern Ireland is not yet covered.

The short answer, with the conditions

The law changed through one statutory instrument, SI 2026/848, made on 16 July 2026 and in force from 27 August 2026. It amends two sets of regulations that previously blocked plug-in solar: the Plugs and Sockets etc. (Safety) Regulations 1994, which did not allow a standard BS 1363 plug to be approved for a device that generates electricity, and the Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR), which govern what may be connected to a home’s installation.

As of November 2026, a plug-in solar kit is lawful in Great Britain when all of these hold:

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The explanatory note to SI 2026/848 puts the practical rule in one line: a plug-in microgenerator must not be installed or operated unless it complies with the Interim Product Specification. That turns the specification from a technical document into the legal test for your kit.

How the law changed in 2026

The change took five months from announcement to force, which is fast for electrical regulation.

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Before 27 August, the government’s position was unambiguous: in its July 2026 consultation response it said these products could not be sold or used lawfully in the United Kingdom. Kits were nonetheless sold online, and many consultation respondents saw the new framework as a way to regularise that grey market.

What the Interim Product Specification requires

The specification is a technical document of more than 40 pages based on the German product standard DIN VDE V 0126-95, adapted to British sockets and ring circuits. Most of it is addressed to manufacturers, but several requirements decide what you can buy and how you may use it:

• Plug: a moulded, non-rewireable BS 1363 plug with partially insulated pins and a fuse of no more than 5 A, plus extra protection so the pins can never carry a dangerous voltage when unplugged. The inverter must disconnect within 100 milliseconds of losing the grid.
• Prohibited connections: no extension leads, multi-way adaptors, travel adaptors or RCD adaptors.
• Circuits: socket circuits only, never a lighting circuit or a spur feeding fixed equipment such as a cooker or boiler.
• Panels: up to four modules, no more than 2,000 W in total, and an open-circuit voltage at the inverter of no more than 120 V DC. Above 960 W of panels, manufacturers must advise a professional check of your installation.
• Mounting: a supplied mounting system with a structural analysis for UK wind and snow loads; no cable ties, rope or straps as the only fixing.
• Fire safety: no installation on timber balconies, timber cladding, ACM, MCM or HPL cladding, or on buildings undergoing external wall remediation.
• Labelling: a statement that notification to the distribution network operator is mandatory, and a label to fix at or near your consumer unit.

For the electrical side in detail, see how plug-in solar panels work and our UK safety guide on sockets and RCDs.

The ENA register: how to tell whether a kit is legal

The specification makes registration a condition of sale: manufacturers must register each device on the ENA Type Test Register and obtain confirmation that it has been assessed as compliant before placing it on the market. A device that has only been submitted does not count. The government response confirms the same point.

In practice that gives you a simple test before you buy: find the model on the ENA register and check its status reads compliant. One independent tracker counted 121 compliant plug-in devices on the register on 15 October 2026, up from 25 on 3 September; we have not verified the figure on the register itself, and it changes weekly.

One device per household, for now

There is a conflict between two documents, and the stricter one wins. The government specification allows one plug-in device per household final circuit. The amended Engineering Recommendation G98, approved by Ofgem on 11 August 2026, limits plug-in micro-generators to one per customer installation, which in practice means one per household. Ofgem preferred the single-device limit because it removes the need for householders to work out which sockets share a circuit, and because widespread adoption would add up on local networks.

The specification itself notes that the G98 limit applies “unless and until” G98 is amended. If you live in a flat with its own consumer unit, the flat counts as a household.

What is not covered

• Batteries. The legal definition excludes devices that draw power from the home for storage, and the specification excludes plug-in batteries and solar kits with built-in storage. The G98 amendment anticipates plug-in storage, but Ofgem notes such devices remain prohibited from sale and use under the current regulations. See plug-in solar with a battery.
• Other generators. Wind and any non-solar source are outside the definition.
• Bigger systems. Anything above 800 W of AC output is a conventional installation under G98 or G99, fitted by a competent installer.
• Imported kits that do not comply. A Schuko plug with an adaptor, or a kit sold without a plug for hard-wiring, is not a compliant plug-in device.

Scotland, Wales and Northern Ireland

The product approval route under the Plugs and Sockets Regulations extends to the whole UK, but the ESQCR amendment that allows the device to be connected extends to England, Wales and Scotland only. Northern Ireland has its own Electricity Safety, Quality and Continuity Regulations (Northern Ireland) 2012, which the government says are a matter for the Northern Ireland Executive, and its own connection rules (G98/NI). As of 3 November 2026 we have found no change there, so plug-in solar is not yet lawful to use in Northern Ireland.

Planning is devolved. England introduced permitted development rights covering plug-in solar on 27 August 2026 (SI 2026/896), with exclusions for listed buildings and wooden walls, balconies and cladding. Scotland and Wales apply their own rules. Our planning permission guide covers the detail.

Legal is not the same as allowed in your home

The regulations decide whether the product may be sold and connected. They do not override your lease, tenancy agreement, building rules or insurance policy. The government’s 26 August 2026 announcement tells buyers to check permission from a landlord, building owner or freeholder, planning permission and listed building consent before they buy. Unlike Germany, Britain has given tenants and leaseholders no legal right to install plug-in solar; consent depends on your lease. See plug-in solar in a flat and plug-in solar for renters.

Your checklist before plugging in

Next steps

• Do you need to tell your DNO about plug-in solar?
• How much plug-in solar saves in the UK
• How to choose a plug-in solar kit in the UK