Compare UK Smart Export Guarantee (SEG) tariffs with our free smart export guarantee calculator. Model payback and 10-year ROI using 2026 SEG rates — from standard 4p/kWh export to Octopus Flux peak at 25p/kWh.
No contact information required. Select your property type, enter your postcode, then choose your current export supplier to see how the best SEG rates UK-wide affect your solar export income.
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2026 SEG Tariff FAQs
How much do you get for selling solar back to the grid?
Under the UK Smart Export Guarantee (SEG), you are paid per kWh exported to the grid. Rates in 2026 range from around 4p/kWh on basic tariffs to 25p/kWh on smart tariffs like Octopus Flux at peak times. Use our smart export guarantee calculator to compare your current export rate against the best SEG rates in the UK.
What are the best SEG rates in the UK?
The best SEG rates UK households can access in 2026 include Octopus Flux peak export at around 25p/kWh, Octopus Outgoing Fixed at 12p/kWh, and average market rates near 13p/kWh. Standard supplier tariffs may pay as little as 4p/kWh. Our solar export tariff comparison tool shows how each rate affects your payback and 10-year ROI.
How does Octopus Flux compare to standard SEG tariffs?
Octopus Flux vs SEG on a basic tariff can mean more than double your export income at peak times. Flux pays higher rates when the grid needs power most, while standard SEG tariffs often pay a flat 4–15p/kWh. Switching can shorten your solar payback period and increase lifetime export earnings.
Do I need an MCS certificate to get SEG payments?
Yes. To receive Smart Export Guarantee payments, your solar installation must be MCS certified and registered with your chosen SEG licensee (usually your electricity supplier). An export meter or smart meter capable of half-hourly export readings is also required.