Is plug-in solar legal in the UK?

On 27 August 2026 the law changed. Until then, plugging anything that generates electricity into a socket was effectively banned, because the plug standard forbade it. A new regulation, SI 2026 No. 848, created an exception for one specific thing: a compliant plug-in solar device.

The rules at a glance

Sources: SI 2026 No. 848; the Plug-in Solar Device Interim Product Specification version 2 (16 July 2026); ESQCR regulation 22; Engineering Recommendation G98 Issue 2 Amendment 1, approved by Ofgem on 11 August 2026. Read on 26 September 2026.

The 800W limit is about the inverter

This confuses almost everybody, so it is worth being clear. The law caps “a maximum rated alternating current output not exceeding 800 watts”. That is the microinverter, the small box that turns what the panels make into mains electricity. It is not a cap on the panels.

The panels can total up to 2,000W. That is why you see kits advertised as 930W, 1,030W or even 1,260W that are still perfectly legal: the inverter holds the output to 800W whatever the panels are doing. Bigger panels are not a con. They are how you get closer to 800W on a grey British afternoon, which is most afternoons.

One caveat. If your panels add up to more than 960W, the official guidance says you should consider having an electrician look at your wiring first. It is advice, not a rule, but it is sensible.

Telling your network operator

This is the one duty you cannot skip, and it is the one most people have never heard of. The law says the person installing the kit must make sure “the distributor is advised of the intention to use the source of energy in parallel with the network before, or at the time of, commissioning”.

In plain English: tell the company that owns the wires in your street, on or before the day you plug it in. Not your energy supplier, the network operator. They are different companies, and you do not choose your network operator: it depends where you live. Our calculator names yours from your postcode.

It is free, it takes minutes, it is not an application and nobody can turn you down. It exists so the people running the network know what is connected to it.

The socket matters

• A fixed wall socket only. No extension leads, no multi-way adaptors, no travel adaptors, no RCD adaptors, no plug converters. The kit’s own plug must carry that warning.
• Pick the right circuit. The guidance says the socket should be on a circuit that has no lighting and no hardwired appliances such as a boiler or cooker.
• Outdoors? The socket must be weatherproof, rated at least IP55 under the product rules, and the Energy Saving Trust recommends IP65 and a qualified electrician to fit one.
• Old fuse box? If your home still has rewireable fuses rather than modern trip switches, have it checked before you buy.
• Label it. Your kit comes with a sticker for the fuse box, saying a plug-in solar device is connected. Put it on.

More on this in sockets, leads and safety.

Do I need planning permission?

In England, usually not. A second regulation, SI 2026 No. 896, made plug-in solar permitted development. There are exceptions, and they matter:

• Not on a wooden wall, balcony or enclosure, and not on any part of the outside that is clad in timber.
• Not on a wooden fence, gate or wall for a free-standing kit.
• Not on a listed building without consent.

Those wood exclusions are a fire precaution, and they catch a lot of people: a timber balcony is exactly where many would put a panel. Scotland and Wales have their own planning systems, and we have not been able to confirm their position, so check with your council before you fix anything to the building. A free-standing frame in the garden avoids the question altogether.

What about Northern Ireland?

Northern Ireland is not covered. The part of the regulation that permits plug-in solar extends to England, Wales and Scotland only. The grid rules there are separate too, and no kit on the register has been tested against the Northern Ireland version. If you live in Northern Ireland, do not assume a kit advertised as “UK legal” can be plugged in at your house. Ask your supplier and NIE Networks first.

The Crown Dependencies are separate too. The Isle of Man, Guernsey and Jersey each run their own electricity networks under their own rules, and in at least one of them you need permission before you connect anything. If you live there, ask your own electricity provider first.

Questions people ask

Do I need permission from anyone?

No. You do not apply and nobody assesses you. You simply tell your network operator that you have connected a kit, on or before the day you switch it on.

What happens if I do not tell them?

You would be breaking the requirement in the electricity safety regulations. We have not seen a published penalty, and we are not going to guess at one. Telling them is free and takes minutes, so there is no good reason not to.

Can I fit two kits?

Not at the moment. The grid rules limit you to one device per household, and the government has said that stands until the rules are changed.

Can I use an extension lead if the socket is awkward?

No. Extension leads, multi-way adaptors, travel adaptors, RCD adaptors and plug converters are all forbidden. If the socket is in the wrong place, have an electrician fit one where you need it.

Will I be paid for the electricity I do not use?

Normally no. Plug-in kits do not usually qualify for the Smart Export Guarantee. Your saving comes from the power you use while it is being made, which is why it matters when you run the washing machine.

Is a kit with 1,030W of panels legal?

Yes, as long as the inverter is rated at 800W or less and the kit is marked Compliant on the register. Panels may total up to 2,000W. Above 960W of panels, consider having your wiring checked.