Plug-In Solar Panels in the UK

Plug-in solar is a small grid-connected solar system intended to supply some electricity to a home without the conventional dedicated connection used for a full rooftop solar installation.

Solar panels generate DC electricity. An inverter converts it into AC electricity that can contribute to the home's current electricity demand.

If the home needs more power than the solar system is producing, the grid supplies the rest.

The Great Britain framework applies to a complete plug-in solar device, not ordinary solar equipment with a plug added afterwards.

The current Product Specification describes a device containing at least a PV module, a grid-following inverter, a manufacturer-supplied connection lead with the required plug and a mounting system.

For Great Britain, qualifying plug-in solar now has a specific lawful route.

The relevant regulatory changes came into force on 27 August 2026, covering England, Scotland and Wales.

The important word is qualifying.

The change does not create blanket permission for every product marketed as:

The Great Britain framework should not automatically be applied to Northern Ireland.

Engineering Recommendation G98 applies in Great Britain. Northern Ireland has separate connection requirements under G98/NI, and the current Product Specification says its application in Northern Ireland is subject to further consideration and may require amendment.

This site's UK section therefore uses Great Britain when describing the new connection framework.

The Product Specification says the device must not supply more than 800 VA of maximum apparent power to the mains installation or more than 3.5 A of current.

It separately permits combined PV-module DC power of up to 2,000 W.

So the headline "800 W" figure should not be read as:

"You may only have 800 W of solar panels."

A qualifying device can have more rated panel capacity than its maximum mains-side output.

There is also a separate 960 W threshold.

For a device with more than 960 W of total PV-module maximum power, the Product Specification requires the manufacturer to advise consumers to consider professional assessment of the existing electrical installation before installation.

That is not another system maximum, and it does not mean an electrician is automatically required simply because the panel rating exceeds 960 W.

A qualifying plug-in solar device is specifically designed to connect to a UK mains socket using the manufacturer-supplied standard plug.

That does not mean:

any solar equipment + any plug + any available socket = qualifying plug-in solar.

The complete product needs to meet the current Product Specification and be used according to its supplied documentation.

The product is intended for installation and operation by ordinary people, but that should not be confused with permission to alter a home's fixed electrical installation.

If electrical alterations, testing or other work on the installation are required, those are separate matters for an appropriately qualified professional.

Yes.

Your Distribution Network Operator, or DNO, operates the local electricity network serving the property. It is not necessarily the company that sends your electricity bill.

The Great Britain plug-in solar route operates under Engineering Recommendation G98, which includes notification to the DNO.

For qualifying plug-in microgeneration, this is a connect-and-notify route rather than the conventional prior-approval process associated with some larger generation connections.

Under the general G98 notification requirement, the DNO is to be told no later than 28 days after commissioning.

The product documentation must also tell the consumer that DNO notification on connection and disconnection is mandatory and provide a route to the current instructions.

Because the consumer submission process is newly evolving, follow the current instructions supplied with the product and by the relevant DNO rather than relying on an old notification guide.

Under the current Great Britain network route, plug-in microgeneration is restricted to one plug-in device per household customer installation.

The Product Specification itself permits one device per final circuit, but it expressly notes that the current G98 network requirement is tighter and takes precedence unless that requirement is amended.

So, for the present route:

one per household is the number that matters.

The new electrical route does not remove property restrictions.

Government guidance tells consumers to check whether separate permission is required before buying or installing plug-in solar.

Depending on the property, that can involve a:

Not every property needs every one of those permissions.

The useful distinction is:

Potentially.

A balcony is one possible location, but it is not the definition of the category.

Depending on the property and the product, a balcony, terrace, patio, garden or another suitable outdoor space may be relevant.

Property permission still needs to be considered separately from the plug-in solar rules.

A battery is not required for plug-in solar to reduce grid consumption while the panels are generating.

Solar can contribute directly to household demand without storing electricity first.

There is also an important Great Britain regulatory distinction.

The current Plug-in Solar Device Interim Product Specification does not apply to:

So do not assume that a battery can simply be added to a qualifying plug-in solar device under the same route.

A battery also does not automatically provide power-cut backup.

Ordinary grid-connected plug-in solar should not be assumed to power the home during a power cut. Outage operation requires a complete system specifically designed for that purpose.

Do not judge a product only from its headline wattage or the fact that a UK retailer sells it.

Before buying, establish:

No.

They use related solar technology at very different scales.

Plug-in solar is a small system primarily intended to offset part of household electricity demand.

Conventional rooftop solar is normally a much larger, long-term property installation with substantially greater generation potential.

The smaller scale of plug-in solar is part of its attraction for some homes, but it also limits how much electricity it can generate.