Scotland Regional Winner, Heating Installer Awards 2026Highly Commended, Scottish Energy Efficiency Awards 2025
🎉 Scotland Regional Winner at the Heating Installer Awards 2026
Scotland Regional Winner, Heating Installer Awards 2026Highly Commended, Scottish Energy Efficiency Awards 2025
🎉 Scotland Regional Winner at the Heating Installer Awards 2026
Home / Blog / Smart export guarantee
How the Smart Export Guarantee pays Scottish solar owners in 2026: current rates compared, the MCS paperwork, tariff pairing and when a battery beats exporting.
Sean Hogan · Heat Geek engineer · Updated October 2026 · 6 min read
Every kilowatt-hour your solar panels generate and you don’t use goes somewhere: into the grid, for which a supplier must offer to pay you under the Smart Export Guarantee. The gap between the best and worst SEG rates is more than tenfold, and most Scottish solar owners are sitting on the wrong one because it came bundled with their electricity supplier by default.
The SEG replaced the old Feed-in Tariff in 2020, and it works differently in one crucial way: rates are set competitively by suppliers, not guaranteed by government. That turns export income into something you shop for and design around, which is exactly what this guide covers.
The Smart Export Guarantee is the licensing obligation that makes electricity suppliers with 150,000 or more customers offer a tariff paying you for every kilowatt-hour your solar system exports. Your smart meter measures export in half-hour blocks, the supplier pays per unit, and the money arrives as credits or bank payments depending on the tariff.
Three structural points matter.
First, only the export meter reading counts; the SEG does not care how much you generated, only what crossed the boundary.
Second, your export tariff and your import supplier can be different companies for most fixed tariffs, so you are free to pair the cheapest import deal with the best export rate.
Third, rates above the floor are entirely the supplier’s choice, which is why the spread is so wide and why checking is worth real money.
For a typical Scottish 4 kWp system exporting around 1,500 kWh a year, the difference between a 1.5p default tariff and a 12p competitive one is roughly £160 a year, every year, for filling in a form.
Rates move, so treat every number here as at the time of writing and check before you sign. The market currently shapes up in three tiers:
Agile export tariffs price each half hour against the wholesale market and can beat fixed rates for households with batteries that can time their exports, at the cost of predictability. For most owners, a strong fixed rate is the sensible default and the agile question comes later, once real export data exists.
If you are still at the planning stage, export income belongs in the payback maths from the start; our solar panel cost guide for Scotland shows how it feeds the overall numbers.
Get a payback calculation for your roof that uses real current export rates, not last year’s assumptions.
“After having several companies provide quotes for solar panels for my husband and me, Aventus ECO was by far the best.”
Kimberly Sloof, ★★★★★ Google Review
Orientation, pitch and shading decide what your roof earns. An engineer works it out before you commit.
“Very pleased with fitting service and the performance of the solar panels and batteries. A good neat job completed with everything clearly explained.”
Stephen Sydenham, ★★★★★ Google Review
Here is the number that should sit behind every solar decision in Scotland: electricity you buy costs roughly 25p per kWh, and electricity you export earns 12p at best. Every kilowatt-hour you shift from export to self-use is therefore worth about double.
That is why a battery changes the economics so sharply. Without storage, a typical household self-consumes 35 to 40 percent of its generation and exports the rest at the lower rate. With a correctly sized battery, self-consumption pushes past 70 to 80 percent, and what still exports does so only after the house and the battery are full. The battery is not an alternative to the SEG; it is the thing that makes sure the SEG only gets the electricity you genuinely could not use.
The exception worth knowing: on the strongest export rates, deliberately exporting from a full battery during evening peak windows can out-earn holding the charge. That is a tariff-specific game, and our solar battery storage guide covers when it is worth playing.
The SEG stops being a standalone decision the moment your household has a battery or an EV, because the import side of the bill is where the bigger money moves.
Octopus Flux, as one example, wraps import and export into one tariff shaped for solar-plus-battery homes: cheap import and modest export overnight, premium export in the evening peak, so the battery charges cheap, the house runs off sunshine, and the surplus sells dear.
EV households often do better pairing an intelligent overnight EV rate with a strong fixed export tariff instead.
Which combination wins depends on your driving, your battery size and your generation profile, and it changes the effective value of your solar by hundreds of pounds a year.
This is why we treat tariff strategy as part of the installation, not homework left on the doorstep. The system gets commissioned, the SEG application goes in, and the tariff recommendation reflects how your household actually uses power.
Get a tariff pairing recommendation built from your usage, your battery and your export profile.
“Aventus Eco installed solar panels and a battery and all went like clockwork. Now running virtually all day on a few £ of off peak electricity (Octopus) and the rest is solar feeding into the battery.”
Paul Prior, ★★★★★ Google Review
You speak to the person who would design your system.
“The level of detail and care he put into both the installation and the advice was impressive. It’s clear that Aventus Eco is dedicated to not just installing systems, but making sure they perform at their best for the customer.”
Tony McCole, ★★★★★ Google Review
The application itself is straightforward when the installation was done properly, because everything the supplier asks for exists in your handover pack:
Choose the export tariff, submit the documents, and payments typically start from the next billing cycle after approval. Ten minutes of admin, permanently recurring income. Every system we install is MCS registered and handed over with the SEG pack ready to submit, which is part of what MCS certification is actually for.
Export income should influence the system design itself, in three specific ways.
Array size first: standard grid permission (G98) covers systems up to 3.68 kW of inverter output per phase, and anything larger needs G99 approval from the network operator before installation. A good installer handles that application as routine; a bad one sizes the system down to dodge the paperwork and costs you a decade of lost generation.
Second, inverter clipping: a slightly oversized panel array feeding a right-sized inverter usually wins in dull Scottish weather, but the clipping maths should be shown, not asserted.
Third, orientation: east-west arrays spread generation across the day, which raises self-consumption and suits battery charging even though the headline peak looks smaller.
None of this is exotic. It is what design looks like when generation, storage, usage and export income are treated as one system, which is how we build solar PV across Scotland. Whether the whole package stacks up for your roof is the question the survey answers, and the broader case is set out in our guide to whether solar panels are worth it in Scotland.
Have your array, battery and export income designed as one system, sized from your actual roof and usage.
“They took the time to get the design right for my home, including properly working out our power use and heat loss and sizing everything accordingly. The solar panels were a no brainer, but Aventus suggested right sizing the solar panels and adding battery storage.”
Duncan Livingstone, ★★★★★ Google Review
We model your usage against Smart Export Guarantee rates, so the payback maths is yours and not a brochure figure.
“From the first phone call, I knew I was in good hands. Sean took the time to understand my needs and walked me through the entire process, from initial consultation to installation day.”
Shereen Ackrim, ★★★★★ Google Review
One survey covers generation, battery sizing, tariff pairing and the SEG paperwork for your home.
Sean answers the awkward questions himself, including the ones a brochure avoids.
“Great experience from start to finish, excellent customer service and a job well done!”
Dee Kay, ★★★★★ Google Review
The SEG is the UK licensing requirement that makes larger electricity suppliers pay solar owners for electricity exported to the grid. Rates are set by each supplier rather than by government, measured through your smart meter in half-hourly blocks.
At the time of writing, competitive fixed tariffs pay 10p to 15p per kWh, with Outgoing Octopus around 12p, while default tariffs can pay under 2p. A typical 4 kWp Scottish system exporting 1,500 kWh a year earns roughly £180 a year at 12p.
Yes. Suppliers require MCS certification of the installation before approving a SEG application. It is the single document the scheme stands on, and it comes from using an MCS-certified installer.
It changes, which is the honest answer. Fixed competitive tariffs around 12p to 15p lead the market at the time of writing, with agile tariffs sometimes beating them for battery households that can time exports. Check rates at the point of application rather than relying on any article, including this one.
Yes, one capable of half-hourly export readings, which modern SMETS2 meters are. Your electricity supplier installs one free of charge if your current meter is older.
Store it, in almost every Scottish case. Avoiding a 25p import beats earning a 12p export, which is why batteries push self-consumption past 70 to 80 percent before anything is sold. The refinement, exporting deliberately during premium evening windows, only makes sense on specific tariffs with a battery in place.
Inside Scotland's Most Resilient Village Hall
What Solar Salesmen Don’t Tell You
Was My Own Heat Pump Install a DISASTER? The Results Are In...
Panasonic L Series Heat Pump Masterclass
Heat Pump vs My House: The Truth About New Build Installs | Part 1
This Is What Kills Heat Pumps Early (And How to Stop It)
From Council houses to £2,000,000 Mansions we do it all with Heat Pumps…
How to DESTROY a heat pump in 3 years....ECO4 install
