Can I plug an 800W solar kit into a socket at home?
The short answer
Only if it is a plug-in solar device marked Compliant on the ENA register.
In England, Scotland and Wales you may plug in one kit whose inverter is rated 800W or less. Its panels can be bigger. Off-grid “800W solar kits” that charge a battery are a different product and must not be plugged into a socket. Northern Ireland is not covered.
Search for “800W solar kit” and you get two very different kinds of product mixed together. When we looked at the results on 26 September 2026, many were off-grid kits: panels, a charge controller and a battery, made for caravans, sheds and boats. A few were the new plug-in kits that became legal on 27 August 2026. They are not interchangeable, and only one kind can go into a wall socket. This page explains what the 800W figure really means and how to tell them apart.
What does 800W actually mean in the law?
The 800W limit is written into the regulation that made plug-in solar legal, SI 2026 No. 848. It defines a plug-in microgenerator as, among other things, a solar device that “has a maximum rated alternating current output not exceeding 800 watts”.
Alternating current is mains electricity, the kind in your sockets. So the limit is on what the kit sends into your home, and that is set by its microinverter, the small box that turns the panels’ output into mains power. The official product specification puts the same limit a slightly different way: no more than 800 VA and 3.5 amps into the mains. For a kit like this the two amount to the same thing.
The same definition says the device must not be designed to take electricity from your home to store it for later. That is why a kit with a battery is outside the rules, whatever its wattage.
Is a kit with 1,000W of panels still an 800W kit?
Yes, if its inverter is rated at 800W or less and it is marked Compliant. This is the point that confuses most people. The specification allows the panels to total up to 2,000W, because the inverter holds the output to 800W whatever the panels are doing. Bigger panels simply reach that ceiling earlier in the morning, later in the evening and on duller days.
Among the 25 kits we found on sale on 7 October 2026, all of them marked Compliant:
- Single panel kits had 340W to 515W of panel.
- Two-panel kits had 800W to 1,260W of panel.
- Four kits had more than 960W of panels. Above that level the specification says you should consider having your existing wiring assessed by a professional before you install.
- Two kits have inverters rated below 800W, at 340W and 475W. They are just as legal. They simply send less into the house.
The government said in July 2026 that the 2,000W panel cap “may be overly restrictive” and that it “will keep this limit under review”. We have not seen any announced change to the 800W output limit itself.
Sources: SI 2026 No. 848; the Plug-in Solar Device Interim Product Specification version 2 (16 July 2026), section 4.1; the government response to the plug-in solar consultation, July 2026. All read 26 September 2026. Kit figures from our own kit database, checked 26 September 2026.
How do I tell a plug-in kit from an off-grid 800W kit?
Both have panels and both may say 800W on the box. What they do with the electricity is completely different.
| Question | Compliant plug-in solar kit | Typical off-grid solar kit |
|---|---|---|
| Where does the power go? | Straight into your home’s wiring through a wall socket, where your appliances use it | Into a battery, through a charge controller, to run things connected to that battery |
| What does the 800W describe? | The most the inverter can send into your home | Whatever the seller chooses to quote. It is not a limit set by these rules |
| Battery? | None. A battery takes it outside the rules | Central to the design: that is where the power is stored |
| On the ENA register? | Yes, marked Compliant, with a System Reference you can look up | Look it up. If it is not a Compliant entry in the Plug-in Solar category, it cannot go into a socket |
| Can it go into a wall socket? | Yes, one fixed socket, no extension lead | No. It is not approved for connection to your home’s wiring |
| Do you tell your network operator? | Yes, before or when you switch it on | Not applicable while it stays off the mains |
An off-grid kit is a perfectly good product for a shed, a boat or a campervan. The problem only arises if someone tries to connect it to the house. Do not do that, and do not plug a battery or power station into the same set-up as a plug-in kit either: the specification requires every plug-in kit’s instructions to warn against using it with a battery.
What should a legal plug-in kit come with?
The specification sets out what a compliant kit must include. If any of these is missing, ask the seller why before you pay.
- A System Reference that matches a Compliant entry in the Plug-in Solar category of the ENA Connect Direct register, for the exact model and mount you are buying.
- A moulded three-pin plug that cannot be rewired, with partially insulated pins and a fuse of no more than 5A.
- A warning on the plug that it must not be used with an extension cable, a multi-way adaptor or an RCD adaptor.
- A mounting system that does not rely only on cable ties, rope, tape or bungee cords, and that can be removed without permanent damage.
- A label for your fuse box, saying a plug-in solar device is connected.
- Instructions that tell you notification is mandatory, with a link explaining how to tell your network operator.
Our kit tracker lists every kit we have found on sale with its System Reference and a direct link to its register entry, so you can check the status yourself in a few seconds. For what to compare between compliant kits, see choosing a kit.
Source: Plug-in Solar Device Interim Product Specification version 2 (16 July 2026), sections 4.1, 5.5.1, 8.2.3.1 and 8.3, read 26 September 2026.
What does the official register show?
We last counted the register’s Plug-in Solar category on 6 October 2026. It held 135 entries: 120 Compliant and 15 Non-compliant. Each entry records a capacity, which is the inverter’s output, not the panels.
- Of the 120 Compliant entries, 107 were registered at 0.8 kW, the full 800W.
- The other 13 were registered below that, at between 0.34 kW and 0.799 kW.
- None was registered above 0.8 kW.
That is why a kit advertised as 930W or 1,030W appears on the register as 0.8 kW. It is not a mistake on the register or a trick by the seller. The register records what goes into your home.
Not everything on the register is on sale. The register includes kits sold only abroad, kits not yet in shops and older versions. Our tracker covers the ones we could find on sale to UK households, which on 7 October 2026 was 25. One more point: “Non-compliant” on the register does not automatically mean unsafe. It can mean the evidence has not yet been accepted. But until an entry says Compliant, that kit cannot legally be plugged in.
ENA Connect Direct Type Test Register, Plug-in Solar category, read in full on 26 September 2026 and counted again by hand on its public search page on 6 October 2026, both times by us. Every entry counted, including several from the same maker; Compliant means the register’s status column read Compliant.
Can I build my own 800W kit from parts?
Not legally as a plug-in device. The law requires a plug-in microgenerator to meet the product specification, and the specification expects the whole device to be type tested and listed on the register. Some register entries name the microinverter inside, and that inverter can have its own separate test reference. That does not make a set of panels and an inverter you have put together yourself into a listed device.
The plug matters too. Until 27 August 2026 the British plug standard forbade using a plug to connect a generator to a socket. The change allows an approved plug only where it is made for use with a plug-in microgenerator that meets the specification. A plug you wire onto an inverter yourself is not that. If you want more than a plug-in kit can give, the route is a conventional installation by an electrician.
Can I have two 800W kits, or add a battery?
Not at present, on either count.
- One kit per household. The grid connection rules, Engineering Recommendation G98 as amended in 2026, allow one plug-in device per household. The government’s July 2026 response says that limit “will continue to apply” until G98 is amended. Two kits on two sockets is not allowed.
- No batteries. The legal definition excludes devices designed to store electricity from your home for later, and the specification excludes battery-integrated kits. See batteries and plug-in solar.
Where can I use an 800W plug-in kit?
In England, Scotland and Wales, since 27 August 2026. The part of SI 2026 No. 848 that makes it lawful to install and operate a compliant kit extends to England and Wales and Scotland only, so Northern Ireland is not covered, and on 26 September 2026 none of the 92 entries was marked as type tested to the Northern Ireland version of G98. The Isle of Man, Guernsey and Jersey run their own electricity networks under their own rules, so ask your own electricity provider there.
Wherever you are covered, the same conditions apply: a fixed wall socket with no extension lead, telling your network operator before or when you switch on, and any permission you need from a landlord, freeholder or planning authority. The full rules are in is plug-in solar legal?, and the socket details in sockets, leads and safety.
Questions people ask
Is an 800W solar panel kit legal in the UK?
A plug-in solar kit with an inverter rated at 800W or less is legal to plug into a wall socket in England, Scotland and Wales, if it is marked Compliant on the ENA register and you tell your network operator. An off-grid 800W kit that charges a battery is not approved for connection to your home’s wiring.
Is a kit under 800W, such as 400W, also legal?
Yes. The limit is a maximum. On 6 October 2026, 13 of the Compliant register entries had a capacity below 0.8 kW, and two of the kits we found on sale had inverters rated at 340W and 475W.
Is 800W the same as 800 VA?
For practical purposes, yes. The regulation says 800 watts of alternating current output. The product specification says no more than 800 VA and 3.5 amps supplied to the mains. Both describe the same limit on what the kit sends into your home.
What will 800W actually run?
On a bright day, your background load, such as the fridge, freezer and router, plus one larger appliance at a time. See what will plug-in solar run? and, for the money side, what a kit costs and how long it takes to pay back.
Will the 800W limit go up?
We have not seen any announced change. The specification is described as interim, and the government expects a full revision of the British Standards within around two to three years. Until something changes in law, 800W is the limit.