Plug-In Solar and the Smart Export Guarantee: Can You Get Paid?

Most plug-in solar kits do not qualify for the Smart Export Guarantee (SEG). The scheme requires solar installations to be certified under the Microgeneration Certification Scheme (MCS) or an equivalent, and a self-installed kit has no certificate. Surplus power still flows to the grid, unpaid unless your supplier offers its own export tariff. Either way, an 800 W kit’s exports are worth tens of pounds a year at most.

How the Smart Export Guarantee works

The SEG has run in Great Britain since 1 January 2020, replacing the export part of the Feed-in Tariff, which closed to new applicants in 2019. Under it, the larger electricity suppliers, called SEG licensees, must offer at least one tariff that pays small generators for each kilowatt-hour they export. Ofgem administers the scheme; suppliers set their own rates, which must always be above zero.

Ofgem’s scheme page lists solar PV among the eligible technologies, for installations up to 5 MW located in Great Britain. The detail that matters for plug-in solar sits in the eligibility checks suppliers must carry out:

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The certification row is the obstacle. MCS certifies installers and products for permanently wired systems; a plug-in kit is designed to be installed by an ordinary person through a socket, with no installer at all. The government’s final impact assessment of July 2026 states the position plainly: SEG requires a half-hourly export meter and MCS-certified installation, and this is “likely not to apply in the first instance for many plug-in solar installers”. A later paragraph adds that without an MCS-accredited installation, consumers are not entitled to the SEG.

What your exports are actually worth

The question matters less than it seems, because a plug-in kit exports little. The government modelled an 800 W kit for a household that is home during the day and uses the GB average of 3,323 kWh a year. Subtracting what the home uses from what the panels produce gives the exports:

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The 12p figure is the flat rate Octopus Energy published for its Outgoing tariff in November 2026, used here only as a reference point. The 26.32p figure is the Ofgem price cap average unit rate for October to December 2026. Every unit you use at home is worth roughly twice what a typical export tariff pays, which is why the savings from plug-in solar come almost entirely from self-consumption.

Octopus itself tells plug-in customers to expect export earnings of no more than about £50 a year. A household that is out all day exports more than the government’s example, so its export income would sit towards the top of that range, and its bill saving lower.

Exporting with no export tariff

Without an export tariff, surplus electricity simply flows out through your meter into the local network, where a neighbour uses it. Nobody pays you, and nothing goes wrong. The power is not wasted from the system’s point of view, and the government’s impact assessment counts it as a benefit for emissions and the network.

Your meter decides what you see on the bill:

• Smart meters (SMETS1 and SMETS2) record imports and exports on separate registers. Exports never reduce your import reading, so you are billed exactly for what you take from the grid.
• Older meters may not record exports in a way your supplier can use. Some older electromechanical meters are reported to turn backwards when power flows out, which is not a recognised way of being paid for exports. Tell your supplier you have a generating device and ask how it will be metered; it may offer a smart meter.

The notification to your distribution network operator is a separate duty and does not create any payment. Our guide to telling your DNO about plug-in solar explains it.

Ways to get paid for exports in 2026

As of 3 November 2026, three routes exist, none of them through the SEG for a standard self-installed kit.

A supplier tariff for its own plug-in kits. Octopus Energy, which was selling plug-in bundles by September 2026, says customers who buy the bundle from Octopus and take their electricity from Octopus can join one of its export tariffs once the kit is installed and notified to the network operator. Its Outgoing tariff paid a flat 12p per kWh in November 2026. Octopus says panels bought from other retailers are not eligible for that route. This is a voluntary commercial offer, not the SEG, and it can change.

A supplier’s non-MCS export route. Octopus also runs a paid route for systems without MCS certification. Its help page lists a £250 fee and three documents: an Electrical Installation Certificate, a Building Regulations certificate of compliance (not applicable in Scotland) and a DNO acceptance letter. Those documents belong to a permanently wired installation by an electrician, so the route does not suit a plug-in kit, and the fee alone exceeds several years of plug-in export income.

Asking your own supplier. Smaller suppliers can offer export tariffs voluntarily, and terms differ. If you want to try, ask in writing whether they will pay for exports from a plug-in device that is listed on the ENA Type Test Register and notified to your DNO, and what evidence they need.

Mistakes to avoid

• Buying a kit for the export income. At 12p per kWh, even a well-placed kit earns around £30 a year from exports. Judge the purchase on what it saves you at home.
• Switching supplier for the export tariff alone. Check the import unit rate and standing charge first; a penny more per imported unit can cost more than the whole export income.
• Paying for certification you do not need. No scheme certifies a self-installed plug-in kit for the SEG, and a fee to “register” your kit for export payments is a warning sign.
• Assuming a battery would fix it. Storing surplus for the evening is worth more than exporting it, but batteries are excluded from plug-in kits under the current rules; see plug-in solar with a battery.

Rooftop solar, plug-in solar and the SEG compared

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The gap explains why the SEG matters a great deal for rooftop systems and very little for plug-in kits. A rooftop system routinely produces more than the house uses at midday; an 800 W kit often does not.

What could change

The government’s July 2026 consultation response records that respondents called for reform of the SEG to maximise the benefit of plug-in solar. The government did not commit to any change. Its impact assessment expects that some plug-in users may seek an export tariff, “contingent on registering their devices” with their network operator, depending on developments in the retail energy market. In other words, the network notification that every plug-in user now makes could become the basis for export payments later, but as of November 2026 that is a possibility, not a policy.

Northern Ireland has no SEG, and plug-in solar is not yet lawful to use there; see is plug-in solar legal in the UK.

Next steps

• How much plug-in solar saves in the UK
• Do you need to tell your DNO about plug-in solar?
• How plug-in solar panels work with your meter and sockets