Is Balcony Solar Legal in the UK?

The Short Answer

Not yet — but that changes on 27 August 2026. The government's own words, in its July 2026 consultation response, are unambiguous: “at present these products cannot be sold or used lawfully in the United Kingdom, as they do not currently comply with the Plugs and Sockets etc. (Safety) Regulations 1994 (PSSR) or the Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR)”. That is the official position, and it is why this page no longer describes plug-in solar as sitting in a grey area.

SI 2026 No. 848 changes it from 27 August 2026. But the route it creates is narrow: it covers a plug-in solar device that meets the final Interim Product Specification and has been assessed and identified as compliant on the Energy Networks Association Type Test Register. Registration alone does not count — the listing has to be verified.

As at our last check of the register (11 August 2026), no kit had cleared that bar. So the honest advice is to wait rather than buy: there is currently nothing on sale in the UK that you could point to as compliant under the new route. When you do connect a compliant device, a G98 notification to your Distribution Network Operator remains mandatory. If you already own a system, none of this is a reason to rip it out — but it is a reason to check whether your kit is ever likely to be verified before you spend more on it.

What Actually Held Plug-In Solar Back?

Two separate things. The formal barrier was product law: BS 1363 prohibits using a plug to connect an electricity-generating device to a socket-outlet, so a plug-in kit could not comply with the PSSR, and the ESQCR did not permit the connection either. That is the barrier SI 2026 No. 848 removes.

Underneath it sat a technical debate about BS 7671 — the IET Wiring Regulations that govern electrical installations in the UK. Specifically, the issue involves ring final circuits: the looped wiring arrangement used in UK homes (and almost nowhere else in the world) for standard 13A plug sockets.

The concern, advanced by some electrical engineers and bodies such as the NICEIC, is that feeding power into a ring circuit from a micro-inverter — essentially running current in the "wrong" direction from a socket — creates a situation that BS 7671 doesn't explicitly account for. In theory, this could cause issues with the fuse in the plug, RCD protection, or the ring circuit's current-carrying capacity.

The independent electrical safety study commissioned by DESNZ tested plug-in devices on representative UK installations, including ring final circuits, and did not identify safety concerns that would prevent safe operation at the 800 VA limit on appropriately protected circuits. The powers being fed into a 32A ring circuit from a 3.5A micro-inverter are modest. That study informed the Interim Product Specification, and BS 7671:2018+A4:2026 — published on 15 April 2026 — is the wiring standard the specification requires compliance with.

What Germany Did — and Why It Matters

Germany provides the clearest template for where the UK is heading. Balkonkraftwerke — balcony power stations — became enormously popular in Germany from around 2021 onwards, driven by high electricity prices and a large population of renters with no other solar option. By 2023, Germany had over 400,000 registered plug-in solar systems; by mid-2024, estimates suggested the true number (including unregistered units) was closer to 800,000.

Germany responded to this organic adoption by formally simplifying the rules. In 2024, the Solarpaket I legislation raised the limit for plug-in solar from 600W to 800W, simplified the registration process to a single online form with the Federal Network Agency, and removed many of the previous technical restrictions. The market subsequently exploded further.

The UK government is explicitly following this model. The 800W limit being used in current UK guidance matches the EU standard. The anticipated simplification of the G98 notification process mirrors Germany's single-form registration. And the same fundamental driver — high electricity prices, a large renter population, and widespread organic adoption — is present in the UK.

The G98 Notification Requirement

Currently, connecting any generation equipment to the UK grid — including a plug-in solar system — requires notifying your Distribution Network Operator (DNO) under Engineering Recommendation G98. This is the main regulatory requirement that applies to balcony solar users today.

The G98 process is not onerous: it involves filling in a form (available on your DNO's website), providing basic information about your system (address, inverter details, capacity in kW), and submitting it. For systems under 3.68kW — which covers all balcony solar — the connection is effectively automatic. You don't need approval; you're simply notifying. Most DNOs acknowledge receipt within a few days.

It's worth noting that the vast majority of people currently running balcony solar systems in the UK have not submitted a G98 notification. Enforcement is essentially zero — there is no mechanism by which a DNO would know a small plug-in system had been connected without notification, and there is no history of enforcement action against individuals for failing to notify. That said, notifying is the right thing to do, it takes about 15 minutes, and it's likely to become even simpler once the anticipated regulatory changes take effect.

Planning Permission

Balcony solar panels are extremely unlikely to require planning permission. Under the Town and Country Planning (General Permitted Development) (England) Order 2015, solar panels on domestic properties are permitted development in most circumstances. The relevant conditions are that the panels should not protrude significantly beyond the roofline and should not be installed on a listed building or in certain protected areas without consent.

Balcony-mounted panels generally fall well within permitted development rights. They are attached to the property (or its structure) and don't protrude above the roofline. If you live in a listed building, a conservation area, or a property with specific planning conditions, it's worth checking with your local planning authority before installing anything visible from the street — but for the vast majority of properties, planning permission is not required.

In Scotland, Wales, and Northern Ireland, planning rules differ slightly from England but the general principle — that small solar installations are permitted development — applies throughout the UK.

What Is Settled, and What Is Still Outstanding

One item that used to sit on the “expected” list is now settled. The output limit is confirmed by the final Interim Product Specification at 800 VA of apparent power, with maximum current not exceeding 3.5 A. The specification also caps the total DC panel capacity behind the inverter at 2,000 W.

Still outstanding, based on the government's announcements and the trajectory of the German model (the wider policy direction was set out in the government's Solar Roadmap, published in June 2025):

• A permanent British Standard to succeed the interim specification, covering plug-in solar connections to ring circuits.
• Simplified notification — likely a single online registration replacing the DNO-by-DNO G98 process. Until it launches, the existing G98 obligation stands.
• Consumer guidance, which the government has said it will publish with stakeholders ahead of the regulations coming into force.
• Possible VAT relief on balcony solar equipment, bringing it in line with the 0% VAT that already applies to rooftop solar installations. Nothing has been announced.

The longer-term technical foundation is the BSI standard for plug-in solar now in development — the UK equivalent of the German DIN VDE specification. None of these outstanding items block the 27 August 2026 route. What does gate it in practice is whether a kit has actually been verified against the specification, and as at our last check none had. Our certification tracker follows that as it changes.

What About Building Insurance?

For homeowners, a balcony solar system is personal property rather than a fixture of the building, so it would typically be covered under contents insurance rather than buildings insurance. See our insurance guide for full details on what to tell your insurer. It's worth informing your insurer — particularly if the system cost more than £500 — to ensure it's included in your policy. Some insurers may ask about the system when you renew.

For renters, the system is entirely your own property. It has no bearing on the building's insurance (which is the landlord's responsibility). Your own contents insurance should cover it.

Frequently Asked Questions