The Smart Export Guarantee Explained In Simple Terms

What the Smart Export Guarantee Actually Is

The Smart Export Guarantee, or SEG, is a government-backed scheme that lets you get paid for the excess electricity your solar panels generate.

Here’s how it works:

• When your solar panels produce more power than you’re using, that extra electricity is sent back (or “exported”) to the national grid.
• Under the SEG, your energy supplier pays you for each unit (kilowatt-hour) of that exported energy.

In other words, you’re not just saving on your bills, you’re earning from your energy.

Why the SEG Exists

The SEG was introduced in January 2020 to replace the old Feed-in Tariff (FiT).
It’s designed to:

• Encourage more people to generate renewable energy.
• Make the grid smarter and more flexible.
• Ensure households get fair payment for the clean energy they share.

Think of it as a small reward for helping balance the UK’s energy system.

How You Actually Get Paid

Here’s where it gets practical.

1. You choose a licensed energy supplier that offers an SEG tariff (Octopus, British Gas, EDF, and others all have options).
2. Your smart meter records how much electricity you export to the grid.
3. The supplier pays you for every exported unit — typically through a monthly or quarterly credit or payment.

The rate you’re paid isn’t fixed by the government; suppliers set their own export tariffs, so it’s worth shopping around.

Typical SEG Rates in 2025

Export rates can vary quite a bit, depending on the supplier and tariff type.

(Rates as of late 2025 – always check current supplier offers.)

What You Need to Qualify

Getting paid through the SEG isn’t automatic — but it’s pretty straightforward if your system meets a few criteria:

• Your solar installation must be MCS certified (which Cahill Renewables systems are).
• You need a smart meter capable of tracking exports to the grid.
• You must apply to an energy supplier’s SEG tariff directly (it’s not handled by your installer).

Once approved, payments start automatically based on your exported power.

How Solar + Battery Storage Works with SEG

If you have a home battery, things get interesting.

Batteries let you decide when to export, which can mean more control (and potentially higher earnings).

For example:

• You can store energy during the day and export it in the evening when rates are higher.
• Some smart tariffs (like Octopus Flux) pay different rates at different times, so timing exports can boost returns.

Even if you don’t export all your energy, the SEG ensures you’re rewarded for what you do share.

Why It Matters

The SEG is one of the simplest and most effective ways to make solar work harder for you.
It turns every panel on your roof into a mini income generator, and helps the UK move toward a cleaner, more self-sufficient energy grid.

And because you can combine it with battery storage, smart tariffs, and heat pumps, it’s a core part of the UK’s shift toward smart, flexible home energy systems.

Cahill’s Advice

At Cahill Renewables, we make sure every solar system we install is fully SEG-ready.
That means certified equipment, compliant metering, and clear guidance on registering with your chosen supplier.

We also help homeowners understand how to:

• Track their export data
• Compare SEG tariffs
• Optimise solar and battery settings for better returns

Because the goal isn’t just to install panels, it’s to make your energy work for you.