UK plug-in solar becomes legal on 27 August 2026: the new rules explained
The regulations have now been made and a firm date is in place. From 27 August 2026, compliant plug-in solar products will have a legal route onto the UK market. That does not mean every existing balcony solar kit or DIY microinverter setup suddenly becomes legal.
Quick summary:
Plug-in solar is no longer just a government proposal. The regulations have now been made and are due to come into force on 27 August 2026.
From that date, compliant plug-in solar products will be able to use a standard UK socket, provided the complete product meets the official Interim Product Specification and the relevant electricity network requirements.
This is not a blanket approval for every European balcony solar kit, every APsystems EZ1 setup or any microinverter that has simply been fitted with a UK plug.
This is the update many of us have been waiting for.
When the government launched its consultation in June, it was clear that plug-in solar was moving closer, but there was still no final legal date. That has now changed.
The new regulations state that they come into force on 27 August 2026. The government has also published its consultation response and the final version of the Plug-in Solar Device Interim Product Specification.
The simple answer:
Yes, plug-in solar is being legalised in the UK from 27 August 2026, but only for approved products that meet the new rules.
Do not miss this point:
The legal change does not make all plug-in solar equipment legal. A random imported kit, a modified microinverter cable or a system assembled from separate parts will not automatically comply.
What exactly has changed?
Until now, the UK plug and socket rules have created a major barrier. BS 1363 plugs are normally intended for equipment that takes electricity from the socket, not equipment that feeds electricity back through it.
The new regulations create a narrow legal route for standard UK plugs used with compliant plug-in solar microgenerators. They also amend the wider electricity safety framework so a qualifying device can be connected and used.
In plain English, the government has not removed the safety rules. It has created a specific route that compliant plug-in solar products can follow.
The date to remember: 27 August 2026
This means that before 27 August, the current legal position still applies. The new route only starts when the regulations commence.
It is also possible that the number of fully compliant products available on day one will be limited. Manufacturers and retailers still need to make sure their products, documentation, plugs, cables, labels and mounting arrangements meet the final requirements.
The confirmed 800VA limit
The maximum permitted inverter output is 800VA, with a maximum AC output current of 3.5A.
Most people will describe this as an 800W system, and under normal domestic conditions the figures are close. However, the specification technically uses VA because it is controlling the inverter's apparent power output.
What the 800VA limit applies to:
It applies to the maximum AC output fed into the home by the inverter. It does not mean the solar panels themselves must add up to exactly 800W.
Up to 2,000W of solar panels may be connected
One of the most useful parts of the final specification is that the connected solar panels can have a combined rated output of up to 2,000W, while the inverter remains limited to 800VA.
This is known as panel oversizing. It can help the system reach useful output earlier in the morning, later in the day and during cloudy or winter conditions.
In bright sunshine, the inverter will still limit its AC output to 800VA. Any extra potential panel output above that level is simply clipped.
| Example system | How it fits the new framework |
|---|---|
| 2 × 400W panels with an 800VA inverter | Within the main target area, provided the complete product is compliant |
| 2 × 500W panels with an 800VA inverter | Potentially compliant, subject to the manufacturer's approved product design |
| 4 × 450W panels with an 800VA inverter | Potentially within the 2,000W panel limit, but wiring and string limits still apply |
| 2,000W of panels with an 800VA inverter | The maximum panel capacity allowed by the product specification |
| 1,600W inverter connected by a plug | Outside the 800VA plug-in solar limit |
Professional advice is recommended above 960W of panels
The specification allows more than 960W of panel capacity, but where the total panel rating exceeds 960W the manufacturer must advise the consumer to consider a professional assessment of the electrical installation.
That does not create a second inverter limit. The inverter still remains capped at 800VA. The 960W figure is a point where the suitability of the household installation deserves extra attention.
From an electrician's point of view, this is sensible. A modern installation with a clearly identified circuit and suitable protection is very different from an older house with mixed wiring, an unclear consumer unit or signs of previous DIY alterations.
Up to four panels, but the DC side is controlled
The final specification allows up to four solar panels as part of a compliant system.
It also places limits on the DC arrangement, including:
- no more than two panels connected in series in a string,
- a maximum open-circuit voltage of 120V DC at the inverter input,
- manufacturer-supplied or manufacturer-approved connectors and cables,
- clear instructions for the permitted panel arrangement.
This is important because the DC side of a solar system can remain live whenever the panels are exposed to light. The rules are designed to keep the system within a lower-voltage, controlled product arrangement rather than allowing consumers to build arbitrary strings.
It must be a complete compliant product
This is probably the most important rule for buyers to understand.
The government is not approving any microinverter that happens to be rated at 800W. It is approving complete plug-in solar products that meet the Interim Product Specification.
A compliant product will normally include:
- one or more approved solar panels,
- a grid-connected inverter,
- approved DC cables and connectors,
- a factory-assembled AC lead,
- a manufacturer-fitted UK plug,
- the correct labels and warning notices,
- full installation and safety instructions,
- a suitable mounting system for its intended use.
A UKCA or CE mark on the inverter is not enough by itself.
The complete kit must comply. Changing the plug, using a different AC cable, mixing unapproved panels or replacing the mounting arrangement could take the system outside the manufacturer's compliant configuration.
The UK plug is not just a normal plug fitted to a cable
The system must use a non-rewireable, moulded BS 1363 plug supplied as part of the product.
The plug arrangement must include:
- a fuse rated no higher than 5A,
- partially insulated pins,
- protection against hazardous live voltage appearing on exposed plug pins,
- a factory-assembled connection lead,
- clear ratings and warning markings.
Anti-islanding protection remains essential, but the final product also needs additional protection against live plug pins. When the plug is removed, hazardous voltage must be removed or isolated within the required time.
No extension leads, adaptors or plug-in RCD adaptors
A compliant plug-in solar device must be connected directly to a suitable socket.
The instructions must prohibit:
- extension leads,
- multi-way adaptors,
- travel adaptors,
- plug-in RCD adaptors,
- unapproved AC connection cables,
- connecting one system through more than one socket.
Direct socket connection only:
If the supplied cable does not reach, the answer is not to add an extension lead. The panel position, inverter position or socket arrangement needs to be reconsidered.
It must connect to a socket circuit
The system is intended to connect to a suitable household socket circuit.
It must not be connected to:
- a lighting circuit,
- a cooker circuit,
- a boiler circuit,
- a spur supplying fixed equipment,
- any other unsuitable fixed-equipment circuit.
The user needs to identify which sockets are supplied by the same protective device. If the consumer unit is poorly labelled or the circuit cannot be identified confidently, professional help should be sought.
Will you need an electrician?
Not automatically.
The new framework is designed to allow ordinary consumers to install a complete compliant product without paying for a full traditional solar installation.
However, self-installation only makes sense where the existing electrical installation is suitable and clearly understood.
An electrician should be involved where:
- the consumer unit uses older fuses,
- modern residual-current protection is missing,
- the circuit cannot be identified,
- the socket is damaged, loose, overheated or outdoors without suitable protection,
- the condition of the wiring is unknown,
- fixed wiring needs to be altered,
- a new socket or circuit is required,
- there is any doubt about the installation's safety.
My view as an electrician:
A compliant 800VA product on a known, healthy and correctly protected circuit is very different from plugging an unknown imported kit into an old or damaged socket. The product rules solve one part of the problem, but the condition of the house wiring still matters.
RCBO protection is the preferred arrangement
The final specification places strong emphasis on modern RCBO protection.
An RCBO combines overcurrent protection and residual-current protection for an individual circuit. This makes it easier to identify and protect the circuit used by the plug-in solar device.
The instructions must tell the consumer how to check the protection and when professional advice is needed. The product guidance also covers periodic operation of the test button while the solar device is generating.
Split-load consumer units using MCBs with a shared RCD may also be suitable in some cases, but the final government documentation recognises that further work and testing may still be relevant to this arrangement.
For more detail, read our guide to bidirectional RCBOs and plug-in solar.
One device per circuit, but G98 may still mean one per household
The product specification allows one plug-in solar device on each suitable final circuit.
That creates the possibility of more than one system in a property where they are genuinely connected to separate final circuits.
However, the final specification also notes that the current G98 network position may still restrict deployment to one device per household until the network rules are updated.
For now, be cautious:
Do not assume you can install several 800VA systems around the house from 27 August. The product specification and the electricity network rules both need to be followed.
DNO notification is still part of the process
Plug-in solar may be easier to install, but it is still electricity generation connected to the public network.
The product instructions must explain the relevant G98 and DNO notification requirements. They must also explain what to do when the system is removed.
The inverter or complete product will need the appropriate type-test evidence and registration. The final consumer process may be made simpler, but the network operator is not being removed from the picture.
Our existing G98 form guide explains how small-scale generation is currently notified.
A warning label must be fitted at the consumer unit
A compliant kit must include a warning label for the consumer unit so electricians and other people working on the installation know that plug-in generation is connected.
This is a small detail, but it is an important one. A circuit may still be receiving power from the solar inverter until the inverter's protection has operated.
Outdoor equipment needs suitable protection
Where the plug, socket or inverter is located outdoors, the equipment must meet the required ingress-protection standard. The final specification uses a minimum of IP55 for outdoor locations.
Buyers should not assume that every outdoor socket is automatically suitable. The condition, weather protection, cable entry and location all matter.
You can read more in our plug-in solar socket guide.
The mounting system is part of the product
The government has not treated the panels' physical installation as an afterthought.
A compliant product must include a suitable mounting arrangement for its intended use, such as:
- ground mounting,
- wall mounting,
- fence mounting,
- balcony mounting,
- façade mounting.
The instructions need to deal with wind loading, snow loading, corrosion, fixings, ballast, maximum height, cable routing, ventilation and fire safety.
Improvised arrangements using rope, string, tape, bungee cords or cable ties as the main means of support are not acceptable.
This is a positive step:
A solar panel can weigh more than 20kg and has a large surface area. In strong wind, poor mounting can be more dangerous than the electrical side of the system.
Restrictions for cladding, balconies and flats
The final instructions must warn against installing panels on certain combustible or higher-risk external wall systems.
This includes restrictions involving some composite cladding, high-pressure laminate, timber cladding, timber balconies and buildings undergoing external-wall or building-safety remediation.
Where there is any doubt, the building owner, freeholder or managing agent should be consulted.
Renters and leaseholders still need permission
The electrical rules do not override tenancy agreements, leases, planning rules or building restrictions.
A renter, flat owner or leaseholder may still need permission from:
- the landlord,
- the freeholder,
- the managing agent,
- the building owner,
- the local planning authority.
Insurance conditions and responsibility for removing the system should also be checked before installation.
Batteries are not included
The first UK plug-in solar framework only covers solar generation without battery storage.
It does not extend to:
- plug-in batteries,
- solar kits incorporating a battery,
- portable power stations exporting into the house wiring,
- plug-in wind generation,
- other plug-connected generation products.
Products such as EcoFlow STREAM, Anker SOLIX Solarbank and other battery-based balcony systems should not be assumed to fall under the new approval.
Solar is approved first. Batteries are not.
A battery adds charging, discharging, fire safety, export control and backup-power issues. The government has kept these outside the first phase.
Will existing APsystems EZ1 systems become legal?
Not automatically.
The APsystems EZ1 is technically well placed because it is designed for small plug-in solar applications and versions are available around the 800W output level.
However, the inverter is only one part of the compliant product.
An existing EZ1 setup may still fall outside the new framework if:
- it was not sold as a complete compliant UK product,
- the AC lead or plug does not meet the final UK requirements,
- the panels are not within the approved configuration,
- the mounting system is not part of the approved product arrangement,
- the required labels, instructions or declaration are missing.
Read our full APsystems EZ1 UK guide for more detail.
Can retailers start selling kits straight away?
The legal route starts on 27 August 2026, but retailers can only sell products that meet the relevant requirements.
This means manufacturers need to complete testing, technical documentation, declarations, labelling, approved instructions and product registration.
I expect some major brands and retailers to move quickly, but buyers should look for clear confirmation that the complete kit complies with the UK Plug-in Solar Device Interim Product Specification.
How to identify a compliant UK product
Before buying, I would look for:
- a clear statement that the complete product complies with the UK Interim Product Specification,
- an 800VA maximum inverter output,
- a maximum AC current of 3.5A,
- a factory-fitted non-rewireable UK plug,
- a fuse rated no higher than 5A,
- full UK instructions and warning labels,
- clear G98 or DNO registration information,
- an approved mounting system,
- evidence that the inverter or product has the required type-test status.
Be careful with online marketplaces:
A listing that says “800W balcony solar”, “UK plug included” or “G98 compatible” is not enough by itself. The seller should be able to identify the complete product's compliance, not just the inverter's rating.
My electrician-led view
I think this is a major and sensible step forward.
Plug-in solar has always had the potential to help people who cannot afford a full rooftop installation, do not have a suitable roof or live in rented and leasehold properties.
The government has avoided a complete free-for-all. Instead, it has created a controlled product route with an 800VA output limit, specific plug protection, direct socket connection, clear installation rules and network notification.
The biggest challenge now will be stopping poor-quality imported products and misleading listings from being confused with compliant UK kits.
The safest approach is simple: wait for products that clearly state they meet the final UK specification, follow the supplied instructions and get an electrician involved where the condition or layout of the existing installation is unclear.
Final takeaway:
Plug-in solar becomes legally possible from 27 August 2026. The system still needs to be the right product, connected to the right circuit, mounted correctly and notified through the correct network process.
Official government links
Government consultation outcome and final documents:
Plug-in solar: regulatory amendment and interim product specification
New regulations:
The Plugs and Sockets etc. (Safety) Regulations 1994 and Electricity Safety, Quality and Continuity Regulations 2002 (Amendment) Regulations 2026
Government announcement:
More families to benefit from lower bills through plug-in panels
Government safety study:
Plug-in solar electrical safety study