What are the best SEG rates?

Best SEG rates: at a glance

You can make money from sending your excess solar electricity to the grid with the Smart Export Guarantee (SEG) – but to get the highest returns possible, you have to pick the right tariff.

There are dozens of options with different requirements, and even the best ones are often only the right choice for certain households. In this guide, we’ll run through the best export rates for the different types of solar homes.

To qualify for any of these tariffs, you’ll need a smart meter and documents that prove your solar installation is certified and approved. You can access these tariffs regardless of whether you've paid the upfront cost of solar panels or opted for a solar subscription.

But be wary of solar products that require a roof lease, as some of these packages will stop you from accessing an export tariff.

It’s worth getting on board, as hundreds of thousands of households have discovered. 283,666 solar installations signed up to a tariff between April 2023 and March 2024, according to Ofgem’s Annual Report – three times more than the previous year.

Overall, households on export tariffs earned £30.7 million – a 327% increase on the income received the year before.

This equates to 13p per kilowatt-hour (kWh) – up from 9p in the previous year – but as you’ll see in the table below, you can earn a lot more if you’re willing to shop around. 

If you would like to see the savings you could get from a solar & battery system, just answer a few quick questions below, and we’ll provide an estimate.

What are the best Smart Export Guarantee rates?

The best overall export tariffs include E.ON Next Export Exclusive, Intelligent Octopus Flux, and British Gas Export and Earn Plus.

However, which export tariff will work best for you depends on your circumstances.

This includes how much of your solar panels' electricity you consume, whether you have a heat pump and/or electric vehicle, and which installer you choose. 

Some export tariffs are only accessible to households that go solar through that supplier, which can be a major limitation – especially if you already have a solar panel system. We’ll go into detail about all of these factors further down in this article.

You should also consider which import tariffs you can use with each export rate. That’s why we’ve matched every export tariff with the best import rate you can get alongside it, and calculated how much each pair can save you on your electricity bills.

After all, signing up for an SEG rate without properly assessing your potential overall savings may mean you’re not making the most of your system.

Language has evolved since the SEG’s beginnings in 2020, and the term ‘SEG’ is now often used to refer to all export tariffs, even those that aren't part of the scheme. They all perform the same function, so we've included all of them in our article.

The best SEG rates: explained

Here are the top seven export tariffs, along with all the information you need about which households are eligible and how you can apply.

You can access these tariffs regardless of who installs – or installed – your system.

In most cases, you’ll have to switch import suppliers to be eligible, but it’s usually worth it.

1. E.ON Next Export Exclusive

You can take advantage of this generous export tariff without needing to get E.ON-installed solar panels or a battery.

16.5p per kWh is the highest rate you can get without needing to either buy your solar installation through the same company or get a specific piece of solar gear.

Just like with OVO and Good Energy, you’ll be guaranteed to receive this export rate until your contract ends – but you have to request quarterly payments, or E.ON will pay you annually.

Your export tariff is only half of the picture, though. For your import tariff, we’d recommend E.ON Next Drive Fixed V5, which offers an off-peak rate of 6.7p per kWh between 12am and 7am every day – and even though it’s an EV tariff, you don’t need an electric car to qualify.

You can use this off-peak period to fill your battery, then discharge throughout the rest of the day as needed, which should massively cut the amount of electricity you import from the grid.

At all other times, you’ll pay around 25.39p per kWh for grid electricity, which is slightly above the price cap – but between the cheap energy in your battery and the electricity your panels are generating, you shouldn’t need to import much electricity.

By combining E.ON Next Export Exclusive with E.ON Next Drive Fixed V5, you could earn £361 in annual export income. This is based on a home using 3,400kWh of electricity per year, with a 4.4kWp solar panel system, a 5.2kWh battery, and solar irradiance of 850kWh/kWp.

Everything you need to know

How to sign up for E.ON Next Export Exclusive

It’s much easier to qualify for this tariff than E.ON’s 21p per kWh Next Export Premium v2 tariff.

With Next Export Exclusive, you have the freedom to either get your electricity from E.ON or your solar installation though the supplier.

Here are the crucial eligibility criteria:

• Receive grid electricity from E.ON, or
• Buy solar panels or a battery from E.ON

Just like E.ON’s Next Export Premium v2 tariff, signing up for Next Export Exclusive involves filling in an online form.

Have the following documents ready: your MCS or Flexi-Orb certificate, a photo of your smart meter, your DNO approval letter, and a schematic diagram of your system if you have a battery.

E.ON can take up to four weeks to process your application, after which point it’ll apply to your DNO for an export MPAN.

Somewhere between one and four weeks later, your DNO should provide this number, at which point the switch will happen instantly.

2. Intelligent Octopus Flux

Intelligent Octopus Flux is an excellent choice for Octopus customers who have solar panels and a compatible brand of battery.

As it pays such a high export rate, it’s best for households that don't actually consume the majority of the electricity they produce.

With Intelligent Octopus Flux, you’ll receive 29.4p per kWh you send to the grid from 4pm to 7pm, and 22.1p per kWh the rest of the day, on average.

This is a very profitable pair of rates – and you’ll earn more by exporting all your excess electricity at peak times, which Octopus does for you automatically.

The supplier uses smart battery controls to set your battery to import and export, maximising your profits through electricity arbitrage – that is, buying cheap grid electricity at night, storing it in your battery, then selling it to the grid at peak times, when its price is highest.

Since import rates match your export rates, you can also cut your electricity bills by shifting your consumption away from peak hours.

To learn much more, head to our full guide on Intelligent Octopus Flux.

And if you'd like to sign up for Intelligent Octopus Flux, click the button below.

Everything you need to know

3. British Gas Export and Earn Plus

In October 2024, British Gas raised this tariff from 15p to 15.1p per kWh, positioning it just above the 15p per kWh tariffs.

Its qualifying conditions are pleasingly limited: households don’t need a full solar installation to be eligible – so if you don’t have panels yet, you can start using this tariff with just a battery.

You can also use British Gas’s excellent Electric Driver tariff, which is available to all customers, regardless of whether you have an EV. This allows you to charge your battery from 12am to 5am for the low price of 7.9p per kWh.

If Sunsave or Hive installs your system, you can also get the Hive Solar Saver discount, which cuts your peak electricity rate by 25%.

Under the January price cap, this reduces the average household’s rate from 24.86p per kWh to 18.65p per kWh.

Everything you need to know

4. Good Energy Solar Savings

This is the best choice for customers who want Good Energy to supply their grid electricity, but would rather have flexibility in all other areas.

The Solar Savings tariff requires you to own solar panels and a battery, but you don’t have to go through Good Energy to get them installed.

And whether or not you have an electric car, you can sign up for the supplier’s EV Charge tariff, which provides you with a 6.75p per kWh rate between 12am and 5am every night.

You can charge your battery up on this cheap electricity, then use it to run your home during the day, when the rate is 30.09p per kWh. The average household (i.e. a home using 3,400kWh of electricity per year) can power most of its electricity usage in this way.

However, if you’re willing to use a different electricity provider, you can make more elsewhere.

Everything you need to know

5. ScottishPower SmartGen

ScottishPower SmartGen is the best tariff on the market for customers who want to choose their solar installer and energy supplier.

On this export tariff, you can get any certified company to carry out your solar installation – unlike on SmartGen+ – so you’ll be free to choose one of the best solar installers in the UK.

If you don’t like being forced to use a specific product, this 12p per kWh is significantly better than the next-best option of its kind: Pozitive Energy’s 5p per kWh tariff.

Households choosing between the two can earn 140% more from their exported electricity by signing up with ScottishPower SmartGen – with no strings or downsides.

If you own a battery, you can sign up to E.ON Next Drive Fixed V5, which allows you to charge your battery with cheap electricity every night.

It’s why this 12p per kWh rate is ranked above export tariffs that offer higher rates.

And if you find a better import tariff, you’re free to switch, since ScottishPower doesn’t mind and E.ON Next Drive Fixed V5 doesn’t come with an exit fee.

Everything you need to know

6. Octopus Flux

Octopus Flux is a variable tariff that pays you different amounts depending on when you export your solar electricity, and also where you live in the UK.

This tariff will almost always be worse for solar homes than Intelligent Octopus Flux, but if you’re looking for an Octopus export tariff and don't have a compatible battery, Octopus Flux is a great choice.

Generally speaking, if you export between 2am and 5am, you’ll only be paid about 4.6p per kWh – but if you send your electricity to the grid between 4pm and 7pm, the rate will rocket up to around 26p per kWh.

If you export your energy at other times, you’ll make about 13p per kWh on average – but if you export as much electricity as you can during peak hours, you can earn a lot more.

When it comes to importing electricity, you should make the most of the 2am-5am slot, when you can buy electricity from the grid for around 14.7p per kWh. This shoots up to roughly 34.3 per kWh between 4pm and 7pm, and hovers at 24.5p per kWh for the rest of the day.

Octopus Flux also offers the best standing charge of any tariff on this list. At 35.96p per day, it’s a whopping 41% lower than the January 2025 price cap, which is 60.97p per day.

All you need to access this rate is to be an Octopus customer, and own a solar panel system that includes a battery. This tariff doesn’t pay as much as Intelligent Octopus Flux, but it is less restrictive about which battery you can have.

However, you’ll have to use your solar app – usually created by your inverter’s manufacturer – to manually set your battery to export at a certain time every day.

To learn much more, head to our full guide on Octopus Flux.

If you're interested in signing up for Octopus Flux, click the button below.

Everything you need to know

7. Octopus Outgoing Fixed

This is Octopus’s simplest export tariff.

All you need to do is get your grid electricity from Octopus, and every month you’ll receive 15p for every kWh your solar panels export, which is a reasonably good rate.

If you’re not looking to get a solar battery, and if you’d rather have Octopus as a supplier than E.ON or British Gas, this is a good choice – though your choices for an import tariff are limited.

You can choose a standard fixed tariff, or you could go for Agile Octopus. This smart tariff adjusts its rate every 30 minutes, reflecting the continually changing nature of the electricity market, and allowing you to save money by shifting your usage to cheaper periods.

The average Agile customer saved £440 in 2023 when compared to a standard tariff, according to Octopus, so you could save more than we’ve indicated below – especially if you get a battery and use it to avoid importing from the grid during peak times.

To sign up for Octopus Outgoing Fixed, click the button below.

Everything you need to know

The best export tariffs for households with an EV

The best export tariffs for households with a heat pump

The best export tariffs with limited installer options

Some suppliers offer tariffs that could net you higher savings and earnings than the options listed above – but you’ll have to get that same supplier to carry out your solar installation.

This can be a significant drawback, particularly if their services are expensive, below par, or both. None of these companies are on our list of the best solar panel installers in the UK, for instance, and anyone who already has a solar & battery system should look elsewhere.

Also, if you’re thinking that Good Energy Solar Savings Exclusive’s 40p per kWh export rate is worth the investment: it’s only temporary. After 12 months, you’ll be shifted onto the supplier’s 15p per kWh Solar Savings export tariff.

1. Good Energy Solar Savings Exclusive

To access this market-high 40p per kWh rate, you have to get a solar & battery system installed through Good Energy.

This means using either Good Energy’s in-house solar installers or JPS Renewable Energy, a Kent-based company owned by Good Energy that operates across the south of England.

And this tariff only lasts for 12 months, after which point customers are moved onto a different, less profitable tariff. More on that lower down.

Everything you need to know

2. EDF Export Exclusive 12m

Energy giant EDF launched this 20p per kWh tariff in June 2024, after more than four years of paying solar customers a maximum of 5.6p per kWh, then changed its name from Empower Exclusive in January 2025.

You have to receive your grid electricity from EDF to qualify, but you can sign up to Empower Tracker Exclusive 12m. This import tariff comes without an electricity standing charge, saving you around £200 per year.

The requirements are less stringent than Good Energy’s, with households only needing to install solar panels or a storage battery through EDF, instead of both.

However, being limited to using EDF to fit your system means you won’t necessarily get the most affordable deal or highest quality installation.

Watch out too, because offerings like these with bonus features don’t always last long, and can be scrapped at a moment’s notice – like E.ON’s now-defunct 40p per kWh rate.

So if you’re getting a system through EDF purely so you can sign up to this tariff, be aware that it can disappear at any time.

Also, the rest of EDF’s pricing is less generous. The tariff tracks the Ofgem price cap, matching it for most of the day before increasing by 10p per kWh from 4pm to 7pm, and dropping by 10p per kWh between 1am and 4am.

Charging your battery for less is always good, but a three-hour 14.86p per kWh rate (as of the January 2025 price cap) is both more expensive and much shorter than other suppliers’ off-peak periods.

You should still be able to fill a 5.2kWh battery with cheap, off-peak electricity, then use it during peak periods, when the import rate shoots up to 34.86p per kWh.

Everything you need to know

3. E.ON Next Export Premium v2

This is E.ON's highest export tariff, after the company ended its 40p per kWh Premium Plus rate in October 2024, just six months into its existence.

The Premium v2 tariff should be less of a flash in the pan, especially as it comes with a fixed two-year contract – though it does require you to buy your solar panels through E.ON's Solar and Storage team, and import your electricity from E.ON too.

You don't need to get a battery to qualify, but a solar panel system is usually more profitable with one – and if you get it installed at the same time, it typically cuts your battery costs.

A 21p per kWh export tariff is appealing, and you’ll be able to sign up to E.ON Next Drive Fixed V5, the best import tariff on the market right now.

It’s a superb combination if you’re comfortable with E.ON installing your system and supplying your electricity, and would be higher in our rankings if it weren’t for EDF removing the standing charge from its Empower Tracker Exclusive 12m tariff.

Everything you need to know

4. British Gas Export and Earn Plus (with Hive Solar Saver)

This is British Gas’s most generous combination of tariffs, but it’s only open to households that get solar panels and/or a battery installed through Sunsave or British Gas.

Those who do can access the supplier’s Electric Driver import tariff – which offers a cheap off-peak rate of 7.9p per kWh between 12am and 5am – with Hive Solar Saver.

This add-on provides you with the bonus of a 25% discount on peak electricity.

That means you can charge up your battery at off-peak times, then use this cheap supply throughout the day, along with the electricity your solar panels generate.

And on the rare occasions you need to import from the grid at peak times, your Hive Solar Saver will ensure you pay 25% less than market rates.

During the January 2025 price cap, that means bringing your rate down from 24.86p per kWh to 18.65p per kWh, on average.

Everything you need to know

5. ScottishPower SmartGen+

This 15p per kWh tariff is a good offer for households who want to purchase either solar panels or a battery from ScottishPower, but not their grid electricity.

This flexibility makes SmartGen+ distinctive – and allows you to choose the best import tariff on the market, which is currently E.ON Next Drive Fixed V5.

When ScottishPower launched SmartGen+ in early 2023, its rate was one of the very best – and though it hasn’t budged from 15p per kWh, giving customers the freedom to choose any import rate has let it hold on to a high spot in our ratings.

SmartGen+ is variable, so you could technically end up making more with ScottishPower than with tariffs higher in this list – but all else being equal, you probably won’t.

And, of course, this tariff will leave you with no choice but to rely on ScottishPower’s solar installation team.

Everything you need to know

6. OVO SEG Install Exclusive

If you receive electricity from OVO, and buy its solar package – which includes a storage battery – you can access the company’s highest SEG rate of 20p per kWh.

The main drawback of this tariff is that you have to buy solar panels, a battery, and grid electricity through OVO, meaning you don’t have any choice when it comes to which installer you use.

When OVO Solar launched in 2023, this rate was only available in Wales and south-west England – some of the best places in the UK to have solar panels – but it’s now open to the great majority of mainland Britain.

And since October 2024, some customers have been able to use Battery Boost, an add-on that enables OVO to charge your battery with off-peak electricity for 10p per kWh, then sell it back to the grid at peak times for 20p per kWh.

Roughly speaking, OVO will charge 70% of your battery every day during winter, when your solar panels will generate less electricity, and 40% in the summer.

With a 5.2kWh battery, this will result in OVO importing and exporting around 1,030kWh per year, netting you £103 without you lifting a finger.

This is a nice sum, but in reality it only serves to put a slight shine on OVO’s underwhelming import tariff, 1 Year Fixed, which comes with a relatively high electricity unit rate of 24.63p per kWh.

Everything you need to know

7. OVO Beyond Exclusive

To access this 15p per kWh rate, you’ll need to have solar panels installed through OVO, and get your electricity through them too.

Like OVO’s other export tariffs, it also comes with a £15 exit fee.

So if you like getting your electricity from OVO and live in mainland Britain, but would rather not buy a battery through OVO – or at all – this may be the tariff for you.

However, if your only issue is not wanting to buy a battery, E.ON's 16.5p per kWh tariff doesn’t require a battery, offers a higher rate, and comes with a better import tariff.

Or, if you want to stick with OVO, getting a battery would at least let you potentially qualify for Battery Boost, a new add-on that enables OVO to charge your battery with off-peak electricity for 10p per kWh, then sell it back to the grid at peak times for 20p per kWh.

As detailed higher up in this article, owners of a 5.2kWh battery could make around £103 per year with Battery Boost, without any effort on their part.

Unfortunately, it would still come with OVO’s 1 Year Fixed import tariff, which is only slightly cheaper than the price cap.

Everything you need to know

The best short-term tariffs

Some energy companies have introduced temporarily high tariffs designed to persuade customers to go solar with them.

To qualify, you have to get your solar panels and battery through the supplier – but once the initial 12-month export contract ends, you’ll be rolled onto a lower tariff.

Here are the three most high-profile short-term tariffs, though two of them have now concluded, as temporary rates do.

1. Good Energy Solar Savings Exclusive

This tariff offers a 40p per kWh rate – but there are many strings attached.

First, you have to pay for a solar & battery installation carried out by either Good Energy Solar or JPS Renewable Energy – which the supplier acquired in 2024 – and sign up to a Good Energy import tariff, too.

Then, after 12 months, you’ll be moved to Good Energy’s Solar Savings tariff, which only pays 15p per kWh.

This means you’ll miss out on higher, less temporary tariffs from the likes of E.ON, OVO, and EDF, which all require you to install through them – and unless you get a compatible battery installed, you also won’t be able to access Intelligent Octopus Flux.

2. So Energy So Bright

If you got solar panels and a battery installed through So Energy from 1 September 2023 to 31 August 2024 and received your grid electricity from E.ON, you had until the end of 2024 to sign up for the supplier’s 20p per kWh So Bright tariff.

If you made your move in time, this rate will apply for 12 months from the date your system was turned on.

After that point, you’ll be shifted onto the company’s other export tariff, So Export Flex – which pays just 4.5p per kWh.

3. E.ON Next Export Premium Plus

E.ON’s groundbreaking 40p per kWh rate made headlines when it launched in April 2024 – but it wasn’t long for this world.

The tariff required households to get solar panels and a battery installed by E.ON after 1 January 2024, but it ended in October 2024.

Customers who made the move during this period gained access to the 40p per kWh rate for 12 months, after which time they were moved to E.ON’s 21p per kWh Next Export Premium v2 rate.

How to choose the best SEG rate for you

The export rate is of course a big part of choosing the best SEG tariff for your household, but there are other important factors – not least which import tariff you can get alongside it.

We’ll run through the main elements, and explain how you should think about them.

At Sunsave, we’ll always help you choose the best export tariff for your situation.

System size and consumption

Consider the size of your solar panel system in the context of how much electricity your household uses per year.

The average solar household exports 34% of the electricity its panels generate – a figure we’ve based on a property with average UK irradiance (850kWh per kWp), a 4.4kWp solar panel system, a 5.2kWh battery, and an annual consumption of 3,500kWh.

If your system produces substantially more electricity than you consume, you may export a good deal more than 34% – in which case you should probably choose a high export tariff, and place less value on getting a good import rate.

Intelligent Octopus Flux is usually an excellent choice in this scenario, as it offers an extremely generous 29.4p per kWh peak export rate.

Alternatively, you could get an electric vehicle and/or a heat pump to take advantage of the excess electricity your panels generate.

If your system is relatively undersized compared to your consumption levels, your export tariff may be less significant than getting on a top import rate, like E.ON Next Drive.

Whether you can change your energy supplier

It’s always possible to leave your energy supplier – but make sure you don’t accidentally incur a penalty charge that makes the move feel pointless.

If you change suppliers before the last 49 days of your fixed-term contract, you could be charged an exit fee. After that, you’ll be protected by Ofgem’s switching windows rule.

Exit fees from fixed tariffs can range from £25 per fuel all the way up to an eye-watering £150 per fuel, so ensure you don’t fall into an expensive trap.

If you already have solar panels on your roof, you obviously won't be able to switch to an export tariff that requires you to use a certain installer, but there are still great options out there.

And if you’re simply too fond of your supplier to move, you can still earn more export income without switching.

Just sign up to ScottishPower’s 12p per kWh SmartGen export tariff, and you can stay on your current supplier’s import rate – though we’d recommend switching to maximise your earnings.

Which installer you use

Several energy suppliers offer special export tariffs to households that pay them to install their solar panel system.

They tend to be some of the best rates on the market, but if you’d rather choose a different installer – or if you already have a solar installation – they’re closed to you.

And even if you could qualify for these higher tariffs because you haven’t yet gone solar, choosing one of them would lock you in to using a certain installer, which could backfire in the long run.

You may not get the highest quality kit or installation, leading to issues further down the line – and if the installer doesn’t offer any maintenance support, you could be left high and dry with a malfunctioning system.

To ensure your installation goes as smoothly and professionally as possible, check out our guide to the best solar panel installers in the UK.

Whether you have a battery

Many export tariffs require you to have a battery, meaning you’ll limit your options if you decide against getting one alongside your solar panels.

A battery allows you to use more of your solar electricity, take full advantage of time of use tariffs, and sign up to the best export tariffs.

That explains why 73% of UK households with solar panels also have solar batteries, according to certification body Flexi-Orb – equating to more than a million homes.

At Sunsave, we always recommend a battery to our customers – so we encourage you to get one too.

Whether you want your battery managed for you

Some suppliers can control your battery to maximise your export earnings and import savings.

If you choose Intelligent Octopus Flux, for example, Octopus will use smart controls that ensure your battery is fully charged and ready to discharge everything to the grid when the peak 4pm-7pm period rolls around.

OVO’s Battery Boost add-on is slightly different, in that it’s the only way to turn OVO’s 20p per kWh export rate into a time of use tariff like Intelligent Octopus Flux.

It gives OVO permission to charge your battery with off-peak electricity for 10p per kWh, then sell it back to the grid at peak times for 20p per kWh.

In all cases, battery controls are a welcome bonus feature that takes a task off your daily to-do list and may add to your earnings, but it’s pretty easy to schedule when your battery charges and discharges through the relevant app.

Whether you have an EV

There are import tariffs that have been created specifically for electric car owners.

However, some of these tariffs don’t actually require you to have an EV. Instead of charging your EV, you can fill your battery on cheap overnight electricity, then export or use it during the day.

If it makes financial sense for you to sign up to one of these rates, the best solution is usually to go with the same supplier for import and export, as that’ll net you the best export rate possible.

Whether you have a heat pump

In a similar fashion, heat pump owners may want to pick an import tariff that saves them the most money on their heating bills – which limits the number of export rates they can get.

Suppliers including Octopus, EDF, ScottishPower, and Good Energy offer time of use tariffs with daily off-peak periods that are only available to households with a heat pump.

If one of these is too profitable to give up, it’ll reduce your export tariff options.

You’ll have to either sign up to an export rate from the same supplier, or export to a supplier that doesn’t require you to also be on one of its import tariffs, like ScottishPower.

How long it takes to sign up (and get paid)

If you’re especially keen on earning export income as soon as possible, it’s worth checking how long it takes to join different export tariffs – and how the supplier’s payment schedule works.

Both of these factors vary wildly. According to the companies themselves, it may take between five and eight weeks to get on one of E.ON’s export tariffs, whereas ScottishPower’s given time frame is eight to 12 weeks.

And depending on which supplier you choose, you could receive your export earnings every month, quarter, six months, or – in E.ON’s case – once per year, unless you request quarterly payments.

If you’re planning on switching to the same import tariff provider, make that move in advance of changing your export tariff, as it’ll speed up the process.

What’s the best SEG rate for you?

Which SEG rate is best for you will depend on your home.

Take into account all the factors we’ve run through above, decide how important they are to you, make your own calculations, and you should find the right solution.

If you end up picking one of the SEG rates we’ve explained in detail, you’ve probably made a good decision – and the fact that you're doing your research means you're unlikely to choose something totally wrong for your setup.

It’s a complicated process, though. To ensure you end up with a tariff that benefits you, consider choosing Sunsave for your solar installation, as we'll help you figure out the right tariff for your household.

If you’re interested in how much you could save with a solar & battery system, just answer a few quick questions below, and we’ll provide an estimate.

Full methodology

Here are all the bases and assumptions we made to create an example household, enabling us to compare dozens of export and import tariffs.

• A standard-sized 4.4kWp system that produces 3,740kWh of electricity per year because its irradiance is 850kWh per kWp, which is the average solar irradiance in the UK

• A household that uses 3,400kWh of electricity per year, which is the nationwide household average, according to government data

• A standard 5.2kWh battery with a round trip efficiency of 90% – meaning 10% of the electricity it takes in is lost across a full charging and discharging cycle

• In an off-peak period lasting three hours or longer, a 5.2kWh battery is able to charge to full with electricity, which can then be used during peak times

• If this kind of off-peak period is available, a household will take full advantage of it every day

• If you set your battery to charge up during this kind of off-peak period, you'll export 65% of your solar-generated electricity and self-consume 35%

• Similarly, if you're signed up to Intelligent Octopus Flux or Octopus Flux, you will export 65% of your solar-generated electricity and self-consume 35%

• If neither of these situations apply, you'll export 34% of your solar-generated electricity and self-consume 66%

Best SEG rates: FAQs