Mixergy Flex Rewards The first, and only, tank that pays in the UK

What is Mixergy Flex?

It’s the feature that decides when your cylinder heats your water, choosing times when electricity is cheaper and cleaner. It used to be called autoschedule.

From September 2026, it does something more: when your cylinder shifts its heating to help the electricity network, that flexibility is worth money, and homes that qualify can get a share of the money.

Why has automatic schedule changed its name?

Because now it does more than optimise your schedule. It has the same features and settings, but with a new name, and a way for your cylinder to earn if your home qualifies.

How do I join, and do I need to do anything?

If you’re already using autoschedule, it’s automatically renamed to Mixergy Flex and nothing about your hot water changes. Simply update your app when prompted, and follow on the on-screen instructions. To be considered for the Flex Reward earnings, you home will also need to meet certain eligibility criteria.

How does my cylinder earn money?

The people who run the electricity network need to match how much power is being made with how much is being used. A cylinder that can heat water a bit earlier or a bit later helps them do that, and they pay for that help. We sell your cylinder’s flexibility into the energy markets, and a share for your home is credited to you.

What does the automatic scheduling do?

Automatic scheduling heats your tank for you, based on how your household actually uses hot water and, if you’ve entered your tariff, when your electricity is cheapest. It heats only what you need rather than keeping the whole tank hot, so you get the hot water you expect using less energy. It’s now part of Mixergy Flex, so leaving Flex switched on keeps it working.

What if my tank isn’t eligible for rewards, should I still switch on Mixergy Flex?

You should still switch Mixergy Flex on if you want the automatic scheduling feature. Eligibility only affects whether you earn rewards on top of the automatic scheduling, and if your tank can’t earn, nothing about how it heats your water changes.

How much will I get?

Anywhere from £0 to £250 a year, based on our modelling. What you actually get depends on your cylinder, how much hot water you use and when, where you live, and what’s happening in the energy markets. It won’t be the same every month or year, and we can’t promise you a figure. If your eligible, from November the app will show you what your cylinder is earning.

When do I start earning, and when will I see it?

If you’ve signed up and your home meets the criteria, your cylinder starts building rewards straight away. You won’t see whether you qualify, or anything you’ve built up, until the Flex Rewards wallet launches in the app in November. From that date the app shows your status and everything you’ve earned since you joined.

When can I take the money out?

Later this year, once withdrawals open in the app and you’ve added your bank details. Anything your tank has earned before then is kept and comes out with the rest. We’ll let you know in the app and by email when withdrawals open.

How do I get paid?

By bank transfer to a UK bank account in your own name, once you’ve earned a minimum of £10. You choose whether to take it every month or let it build up.

Am I guaranteed to be paid?

No. The money comes from the energy markets, not from Mixergy, so we don’t promise any payment or any amount and we’re not liable if payments don’t come through.

The app says I haven’t earned anything. Why?

Being in the scheme isn’t the same as being called on. It depends on your cylinder and how it’s set up, your smart meter, where you live, and what the energy markets are doing. Some of the programmes we take part in only pay when your cylinder actually shifts your electricity use, measured against what you’d normally have used.

Will this make my energy bill go up?

No. Flex earns by holding your tank’s heating back for a short while when the grid is under pressure, then catching up in your cheaper hours. It doesn’t switch your tank on at short notice or push heating into your peak rate to earn a reward. Your rewards are separate from your bill and come to you by bank transfer, not as a discount from your supplier.

Who qualifies for payments?

All of the following need to be true at the same time.

• You’re 18 or over and live in England, Scotland or Wales.
• You pay the electricity bill for your home, or the person who does has said you can sign up.
• You have a working smart meter that’s been sending your readings automatically for at least the last month.
• Your cylinder is connected to the internet with Mixergy Flex switched on and you’ve opted in.
• And you’re not already in another scheme that pays you to shift when you use electricity.

These criteria only affect whether you earn rewards — anyone who joins Mixergy Flex can use the automatic scheduling straight away, whether or not they qualify for payments.

Do I qualify if I’m on a smart tariff like Octopus Go or Agile?

Flex Rewards works with any tariff, including time of use tariffs like Octopus Go and Agile, and the only thing that stops you joining is if your cylinder is already enrolled in another scheme that takes control of your Mixergy tank and then pays you for controlling it.

How do I know if my home qualifies?

You’ll see your rewards status in the app later this year, along with anything your tank has earned since you joined. Until then, the best check is the list above. If all five apply to you, you’re very likely to qualify.

My home doesn’t qualify. Am I still building up money?

No. Nothing builds up for you while your home doesn’t meet the criteria, and nothing is owed to you for that time, though your cylinder keeps using Mixergy Flex to heat at the cheapest times. You stay enrolled, so if things change you start earning from that point without having to do anything.

What’s the most common reason a home doesn’t qualify?

The smart meter. Payments are worked out from your half hourly electricity readings, so we need a meter that’s sending those readings automatically. If yours isn’t, your energy supplier can usually sort it out with a phone call.

I don’t have a smart meter. Can I still join?

Yes, you can still use Mixergy Flex to heat at the cheapest times. You just won’t earn rewards without a working smart meter. Your energy supplier can arrange one.

I rent my home. Can I take part?

Yes, if you pay the electricity bill and have the full authority from the owner of asset. The money goes to whoever pays the electricity bill, so in most rented homes that’s you, not your landlord. Please check with your landlord if you are unsure.

I live in Northern Ireland. Can I join?

Not at the moment. The scheme covers England, Scotland and Wales.

I heat my water with a gas boiler. Can I take part?

You can switch Flex on to keep the automatic scheduling, which heats only what you need and cuts the gas you use. The rewards come from shifting when your tank uses electricity, so if your tank is heated by gas there’s no electric heating to shift and it won’t earn rewards for now. Nothing about how it heats changes. If you add electric heating later, your tank can start earning from then. 

Should I switch my tank to electric to earn rewards?

No, not just for the rewards. Rewards are a share of what your tank’s flexibility earns in the energy markets, and they’re unlikely to cover the difference between gas and peak-rate electricity. Only heat with electricity if it’s already the cheaper option for you, for example on a cheap overnight rate or with spare solar. If it is, Flex will heat in those hours and any rewards come on top.

Can I take part and only use electricity when it’s free or during an event?

Not at the moment. Flex works with the heat source you’ve set in the app and doesn’t switch between gas and electricity on its own. If that changes, we’ll let you know in the app.

My tank is heated by a heat pump. Does Flex work with it?

Yes. Flex schedules your heat pump around your routine and your tariff in the same way it does for an immersion heater. Because a heat pump uses electricity, your tank can earn rewards as long as your home meets the criteria above.

I have solar panels or a home battery. Can I take part, and will Flex drain my battery?

Yes, you can take part. Flex earns by holding heating back when the grid is stretched, not by switching your tank on at short notice, so it won’t call on your battery or push you into peak-rate electricity for an event. Your tank carries on using spare solar when it’s available, and if you divert solar to the tank today that continues as before.

I’m on a fixed tariff with a cheaper night rate. Will Flex heat at my day rate?

Flex heats in the cheap hours you’ve entered in the app, the same way automatic scheduling always has, so on a day and night tariff it aims for your night rate. It won’t deliberately move heating into your day rate to earn a reward. Any rewards come on top of the saving, so there’s nothing to lose by switching it on.

My tank isn’t heating in my off-peak times. Should I switch to a manual schedule?

You don’t need to. Mixergy Flex works out your heating times from your tariff details and how you use hot water, and it can take up to two weeks to settle into your routine. Check that the off-peak times saved in the app match your tariff, and give it time to learn. You can switch to a manual schedule if you’d rather set fixed times yourself, but your tank won’t be eligible to earn Flex rewards while it’s on manual.

Will I run out of hot water?

It shouldn’t happen once Flex has learned your routine. Your tank knows how much hot water it’s holding and how hot it is, down to the litre, so it heats around the way you actually use it. Give it up to two weeks to learn after you switch it on. If you need more in reserve, choose Standard rather than Economy, and Boost always works if you need extra.

Will I notice anything different in my water heating?

You shouldn’t. There’s nothing to switch on and no alerts to respond to. The adjustments are short and they happen in the background.

Can I still choose when my water heats?

Yes. Your settings in the app are yours, and Mixergy Flex works within them.

What if I need extra hot water unexpectedly?

Boost it in the app as you always have. Nothing about that changes.

Why is my tank heating outside my cheap-rate window? 

A few things can cause this. Check your tariff times and prices are entered correctly under Mixergy Flex in the app. If you’ve only just switched Flex on, give it up to two weeks to learn your routine. Once a week your tank runs a cleansing cycle that heats the whole tank for safety, whatever the tariff. And occasionally Flex heats a little earlier than usual so it can hold back during a grid event. If it keeps heating at peak rate after two weeks, get in touch and we’ll look at your tank’s data.

How long does Flex take to learn my routine?

Up to two weeks. During that time your tank may heat a little more than it needs to while it works out your pattern. If you find it’s not leaving you enough, choose Standard rather than Economy, and use Boost when you need extra. 

Does Flex work with Holiday mode?

Holiday mode pauses heating and Flex until your return date, then Flex carries on where it left off. If you’re joining just before a long trip, it’s fine to switch Flex on now. It will pick up learning your routine when you’re back.

I’ve changed energy supplier or tariff. What do I need to update?

Update your tariff details under Mixergy Flex in the app so your tank keeps heating in your cheapest hours. Switching supplier doesn’t affect your place in the scheme, but if your new supplier doesn’t keep your smart meter sending half-hourly readings, your home may stop qualifying for rewards until that’s fixed.

I’ve updated the app. How do I switch Flex on and check it’s working?

Open the menu in the top right of the app and choose Mixergy Flex. Pick Standard or Economy, consent to the terms and click continue. Once you’ve joined Mixergy Flex, you’ll be able to change your settings through the Mixergy Flex page.

If you select off, your tank is following a manual schedule instead. You don’t need to uninstall the old app first, just update it. You’ll see your rewards status in the app later this year, so don’t worry if nothing about rewards shows yet.

Do I have to accept the Flex terms to keep automatic scheduling?

Yes. Automatic scheduling is now part of Mixergy Flex, so if you decline the terms your tank moves to a manual schedule that you set yourself. You can switch Flex on later at any time from the app menu and your tank will start learning your routine again.

Should I join Mixergy Flex?

If you are already using the automatic schedule feature, yes, because it’s the same feature with a chance to earn on top. If you heat with electricity, have a smart meter and aren’t in another scheme that pays you to shift your electricity use, you’re likely to earn. If you heat with gas, you’ll get the scheduling but not the rewards for now. Either way you can switch it off or leave at any time. 

Can I turn Mixergy Flex off?

Yes, at any time in the app. Turning Flex off pauses your automatic scheduling and moves you to a manual schedule that you set yourself. Any rewards you’ve built up stop growing while it’s off. What you’ve already earned is safe, and you can turn Flex back on whenever you like.

Can I Leave the Mixergy Flex scheme?

Yes. Leaving Flex withdraws your consent to the scheme altogether and turns off your automatic scheduling. You’ll lose any rewards you’ve accrued but not yet had paid out.

What happens to money I’ve already earned if I leave?

If you leave Flex (rather than just turning it off), you’ll lose any rewards that haven’t already been paid out to your bank account. If you think you might want to leave, withdraw your balance first if you can.

I’m moving house. What do I do?

You’ll need to leave Mixergy Flex before you move, since your consent to share meter readings is tied to your address and can’t transfer with you. Withdraw any balance you can beforehand, because leaving means anything you haven’t withdrawn is lost. Whoever moves in can sign up in their own name.

I’m changing energy supplier. Does that matter?

Switching supplier is fine. Just keep an eye on the app afterwards, because if your new supplier doesn’t keep your smart meter sending readings automatically, your home may stop qualifying until that’s fixed.

Can you remove me from the scheme?

We can, and the terms will set out why. The reason will be if your go offline, your smart meter stops sending readings, you move house, or you stop meeting the criteria.

Something isn’t working since I updated the app 

If the Flex button doesn’t respond, you see a ‘can’t consent’ message, your tank has gone offline or a setting has disappeared, first close the app fully and reopen it, then check you have the latest version in the App Store or Google Play. If that doesn’t fix it, contact the Homeowners and Residents team on 01865 884 343, option 3, Monday to Friday 9am to 5pm, or email tech.support@mixergy.co.uk.

What information do you use?

Your half hourly electricity readings, and data from your cylinder such as how much energy it used, water temperature, how full it is and when it heated. We also use your address, email and MPAN (the reference number that identifies your electricity supply). Our full mixergy flex terms and conditions will set out exactly what data we share and for what purpose once its live.

Who sees it?

Our partner Axle Energy, and the organisations that run the electricity network programmes, who need it to register your home, check your cylinder did what it was paid for, and work out what you’re owed. Our privacy notice and terms will have the full details of how we share your data. 

Can I change my mind about sharing it?

Turning Flex off pauses things but keeps your data-sharing consent in place. To withdraw consent altogether you’ll need to leave Flex, which also ends your part in the scheme and, as above, means losing any rewards you haven’t already had paid out.