Octopus Flux Tariff.

How do I switch to the Octopus Flux tariff?

The Octopus Flux tariff is now live. ☀️🪫

If you are an existing customer switch to Octopus by completing the online form and Octopus will take care of the rest.

New customers wishing to switch to Octopus Energy on the standard Octopus Flexible tariff first but as soon as your account is live and the switch has been completed you can ask to move to the Octopus Flux tariff.

As a new customer if you try to complete the Flux online form it will just direct you to the standard sign-up page. By using the linked page below to sign up you’ll get £50 credit after your first direct debit payment.  (I’ll also get £50 so a big thank you if you use my link)

Contacting Octopus Energy

If you are super keen once you have signed up as a new customer email hello@octopus.energy or DM Octopus on Twitter quoting your account number and ask to be moved to the Octopus Flux tariff as soon as possible as the switch is complete.  You can also phone them on 0808 164 1088.

My preferred method is to contact Octopus via Twitter they are really quick to reply but if you choose to call Octopus after signing up you can even select your on-hold music from your Octopus dashboard. They think of everything! Just ask if once your switch is complete they can automatically transfer you onto the tracker tariff. I’ve switched tariffs lots of times via Twitter.

Can I still receive Feed in Tariff (FiT) payments if I switch to Octopus Flux?

Feed In Tariff (FiT) closed to new applications in March 2019. If you are on the FiT you either signed up for 20 or 25 years depending on when you signed up.

On FiT you will be receiving a payment for;

1. Energy generated
2. Energy exported.

If you switch to Octopus Flux you can still receive FiT payments for energy generated but not energy exported. Octopus can cancel your FiT export payment if it’s registered with them. Alternatively, they will tell you when to contact the supplier your FiT is registered with to cancel it. Octopus Flux will then take over as your export tariff.

Once you cancel FiT export there is no going back. If you decide Octopus Flux isn’t for you you’ll need to claim the Smart Energy Guarantee (SEG) or another export tariff of your choice in order to be paid for your excess solar.

Just remember that deemed export is 50% of your generated energy. It doesn’t matter if you use all your solar and have nothing to export you still get the 50% payment on FiT. This is a good deal so you need to get your calculator out to see if you can beat it on Octopus Flux.  Deemed export is currently paid at the rate of 7.5p per kWh on FiT.

Is the Octopus Flux tariff a good all-year-round option?

For 21 hours hour of the day, the lowest price you will get for exporting your excess electricity is  17.26p per kWh.  This is higher than the Smart Energy Guarantee or the Octopus Outgoing fixed rate of 15p per kWh. So for those without battery storage (it is not a necessity on Octopus Flux) as the days get longer this is quite attractive especially if you don’t have an electric vehicle to fill up. Yes, the peak rate is higher for import but you should be able to avoid this in the spring and summer.

This EU sunshine database is a quick way of reviewing how output might change throughout the year. It is quite handy if you have a new solar PV system and are not sure.  I have attached an example below, it is shows data based on solar PV in Cardiff.

As you can see from this tweet and the chart above solar PV starts producing more energy around February and it keeps going up until the height of summer.

Anyone else thinking of already changing to outgoing yet we got good bit extra energy for last 7 days and rest of the month only 2 days might need the grid to top up batteries !

— Nickie redshaw (@Thew0lfman) February 9, 2023

If you don’t generate that much excess electricity in winter and have a small battery you can choose to switch away from the Flux tariff from November or December through to February then like Nickie switch back as the days get longer. If you have battery storage the Octopus Flexible tariff with the Economy 7 option is worth considering if you are not eligible for an EV tariff. You’ll get 7 hours off-peak to charge your battery and you will be eligible for Octopus Fixed Outgoing which is 15p per kWh all day long.

A quick snapshot of Fay’s home in February 2023.

This is an example of a home with battery storage and solar PV. Fay has 14 panels on her roof and two batteries which can store 3.6kWh (so 7.2kWh is our total capacity).  The snapshot should highlight why in the winter months you may have less to export to the grid. (@Fay_Purcell, Twitter, thanks for the data!)

Fay has an electric vehicle and is currently on the Octopus Go tariff. She gets paid 4.1p per kWh to export any excess electricity. In this example, she is NOT charging her EV.

If you scroll down the page you can also see from Ben’s spreadsheet below that his export really drops between December and March. Many people switch tariffs throughout the year. Octopus agile export, as an example, is defiantly more popular when there’s more daylight in the summer it may well be the same for Octopus Flux.

As you are not committed to a contract with Octopus Flux like all Octopus tariffs you can switch away at any time. So, without a doubt, this is a great tariff if you have a simple solar PV array and want to export at the best prices as the days get longer.

We try not to export as we only get around 4p/kWh for it, but it’s definitely a balancing act as you have to try to guess how much to charge the battery the night before, how much PV you are going to get during the day & how much electric you are going to use! – Fay

As you add in more hardware, such as battery storage, the maths gets a little trickier.  It really does depend and your home set-up and your energy needs.

Everyone with solar PV seems to have a spreadsheet but don’t panic if this is all new to you. You are actively trying to make your home greener taking control of where the electricity you use comes from. I like Fay’s illustration which is a graph form. A lot of the systems provide this data so don’t worry about having to be a maths bod!

Home battery state of charge in the summer with Solar PV. 

@Eddiewawa’s Twitter data shows his typical battery state of charge for July.  He has overlayed it onto the Octopus Flux tariff timeline. As you can see, his battery stays charged until later in the evening due to the extended daylight hours. If Eddie didn’t need the excess energy he could easily export it to the grid during the Octopus Flux peak rate window. He would mostly likely have lots to export and some to store for later. (Eddie has an EV so we discuss how he decides to use that energy further down the page)

 

Octopus Flux tariff v Cosy Octopus tariff.

If you are one of the green pioneers who has lots of green solutions for your home, such as a heat pump, solar PV and battery storage Octopus Energy will have a tariff to meet your needs. There have been two new smart tariffs launched so far in late December 2022 and February 2023, Octopus Cosy and Octopus Flux. Finding which one suits your needs will take a little consideration as everyone’s home needs are different.

There are two main differences between the Octopus Flux and Octopus Cosy tariff.

On the Flux tariff, you’ll get 3 hours of off-peak compared to 6 hours off-peak on the Cosy tariff. The rate is the same but you will get 50% fewer off-peak electrons.  That’s because the Cosy tariff is designed for heat pumps that need to be consistently on in the winter. Its aim is to help stay customers stay warmer for less. This is ideal in the winter especially when there is a limited amount of sunshine but maybe not such a necessity in the winter.

The peak rates and times are the same on both the Octopus Cosy tariff and Octopus Flux.  The day rate and the standing charge are also the same on both tariffs BUT for export, the most you will be able to get is 15p per kWh on Octopus Flux. So it depends on two things, the time of year and how much electricity you usually have spare to export to the grid. This is important as you could get double the export rate on the Flux tariff. The Flux tariff offers an attractive 31.31p per kWh export between 4 pm and 7 pm. (This is based on a quote for South Wales)

Both Octopus Cosy and Octopus Flux offer export rates way above the 4.1p per kWh on the Smart Energy Guarantee. In my opinion, Octopus Energy puts other energy suppliers to shame with their groundbreaking tariffs.  This is a quick summary but there are so many variables I thought this would just highlight the two obvious differences and benefits between tariffs.

Octopus Intelligent Tariff v Octopus Flux – Let’s add in an electric vehicle just to mix things up. 

Octopus Flux is not designed for EV owners. If you have an electric vehicle Octopus has two dedicated tariffs just for you, they are Octopus Go and Intelligent Octopus tariffs. That being said if you have excess solar you could benefit from much higher export rates on the Octopus Flux tariff. Whilst on either of the Octopus EV tariffs you are restricted to the basic 8p per kWh export rate on Octopus Go and 15p per kWh on the Intelligent Octopus tariff.

The export rates for both Octopus Go and Intelligent Octopus changed in September 2023. They are no longer limited to the 4.1p per kWh export rates applied when the comparisons were written below. Please take this into account when reviewing these tariffs.

Meet Eddie 

Eddie is an EV driver. He has a Tesla Model Y Long Range, with an assumed real-world range of 250 miles. Eddie has solar PV and battery storage.  He can generally get away with importing most of his home electricity on the off-peak import rates.

Eddie has kindly sent me these figures where he has compared the Octopus Intelligent v Octopus  Flux tariff based on his electricity needs at home. (@eddiewawa on Twitter)

The Octopus intelligent tariff is the clear winner when you compare Eddie’s own figures for Octopus Intelligent versus Octopus Flux. The issue Eddie has is he wants to be on an EV tariff BUT it limits his export options. The Octopus EV tariffs offer a cheaper import rate for a longer period each night.

In this illustration, Eddie exports his excess solar at 4.1p per kWh. He could get more if he was on a non-smart tariff for importing his electricity. Eddie could also consider a tariff, such as the Octopus Agile export tariff but then he wouldn’t be able to be on one of the dedicated EV tariffs which are Octopus Go and Intelligent Octopus.

Eddie will be sticking with the intelligent tariff BUT every home is unique and everyone’s needs are different so it is important to sit down and do some maths in order to work out what is right for you. You can read my review on all the Octopus Outgoing/Export tariffs in another post.

Comparing Octopus Go to the Octopus Flux tariff.

Meet Ben

Ben has an electric vehicle with a 73 kWh battery. He drives 8,000 miles a year and averages 3.6 miles per kWh.  Ben charges his EV off-peak and drives 2000 miles a year less than Eddie.  He has solar PV on a west-facing roof with a maximum 3.28 kW peak. His home battery can store 5 kWh of electricity. (@SimsBSims on Twitter)

Here are Ben’s forecasted costs based on last year’s electricity figures. He is on the current Octopus Go tariff which is 12p per kWh off-peak.

Unlike Eddie Ben exports less electricity to the grid and also imports less too.

 

Comparing real-world examples on the Octopus Flux Tariff.

Ben exports 490 kW less than Eddie and imports 513.5 less too. He also doesn’t need to charge his EV as much as Eddie as he drives his EV less. His home usage is different as his needs are different.  Ben, would be better off on the Octopus Flux tariff. He would save £139.12 on the Octopus Flux tariff compared to Octopus Go.

Ben has registered his interest to switch to the Octopus Flux tariff. He will switch from Octopus Go as he will make quite a savings over the year.

These two examples hopefully highlight that everyone is different. Please don’t listen to anyone who claims to know what is best for you. Throw away comments that one or the other tariffs are best may not be correct. With smart tariff as everyone’s home set-up and energy needs are different you really need to sit down and do the maths.

Thanks to Ben, Eddie and Fay for crunching the numbers and allowing me to share them! 💚

Thankfully Octopus allows you to switch between tariffs. If you think you have your sums wrong you can very easily switch tariffs. All it takes is a DM, phone call or email.

If you own an EV, solar PV and battery storage here are some quick questions you could ask yourself if you want to stick your figure in the air to see if Octopus Flux is right for you.

1. How many miles do you drive a week? A low mileage could be a good indication that Flux may well be worth a shot, especially from March to October.
2. Could you charge your EV from solar during the day if you have a slightly higher mileage?
3. What does your export/import balance look like? Do you regularly need to top up large amounts from the grid? You may find in the summer you have vastly different answers. Don’t be scared to have a spring/summer tariff and a winter tariff. It’s easy to switch between the two!
4. How much control do you have over your battery? The daytime export rates on Flux are already good, but that peak rate is extra juicy! Being able to schedule a forced discharge and export in the peak means being paid even more for your solar by time-shifting it. Just remember the days are longer in spring/summer so you may be automatically exporting in any event as your batteries are full.
5.  Are you happy to just have a go? – You are not locked into tariffs with Octopus, so if it doesn’t add up for you switch to another tariff.  If you switch away from say, Intelligent Octopus to Octopus Flux you’ll have to wait 30 days to switch back to that tariff but you can always choose another smart tariff or even a regular standard tariff. (Although there are so many smart tariffs you’d find a better solution)

Finger in the air v spreadsheets.

The finger-in-the-air approach may appeal to you if you want a quick general idea of if Octopus Flux would be best for you. I get lots of questions about the viability of Octopus Flux if you own an EV but the answer depends on your circumstances. There are serval spreadsheet enthusiasts out there who share their figures and even let you input yours. You’d get a definite answer one way or another that way but spreadsheets make me come out in a cold sweat. 😀 If you want figures you could also look at the Octopus Compare app which I understand also includes a Flux comparison.

Bye, Bye Tesla Energy Plan.

In February 2023 the Tesla Energy Plan was removed and was replaced with Octopus Flux.

Here is a Facebook group that has been set up (not by me).  There are lots of discussions about what people plan to do next. I have messaged Octopus to see if I can get any clarification and will keep this page updated with any developments.

You can read my full review of all Octopus export tariffs here.

Tomorrow is another day and the sun will always come up!

Don’t worry if you’re unsure which Octopus tariff is right for you. There are plenty of options to choose from and you can easily switch between them at any point in your journey – there’s no need to make a permanent decision as none of the tariffs are fixed so you won’t be missing out on a deal if you decide to switch to another tariff later.  All Octopus Energy tariffs are currently subject to change. There are no fixed-period tariffs to choose from at the moment.