Hot water tank · Coming soon
Let your hot water tank earn money
HeatSync runs your hot water tank to suit the grid: it heats the water when the grid needs it, and you still have hot water when you want it. You get a share of the payment.
Coming soon · fitted by an electrician
HeatSync cannot be bought yet. Contact us if you would like to hear more.
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Coming soon
cannot be bought yet
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About 20 minutes
fitted by a licensed electrician
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Metro Therm
made after 2010, 2-phase
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East Denmark
DK2 — east of the Great Belt
How it works
You do two things. We handle the rest.
You do this
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Contact us
HeatSync is coming soon.
Read more
HeatSync cannot be bought yet. Write to us, and we will tell you more and get back to you once it can be ordered.
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Have it fitted
An electrician, about 20 minutes.
Read more
A licensed electrician fits HeatSync to your hot water tank. It typically takes 20 minutes, and we put you in touch with an electrician in your area.
We do this
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Heat the water
When the grid needs it.
Read more
NM1 heats the water when the grid needs it, and you still have hot water when you want it. You can pause the control at any time in the app.
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Pay out
Quarterly, to your bank account.
Read more
Your share is paid out quarterly as an ordinary bank transfer.
Which tanks does it work with?
HeatSync works with Metro Therm hot water tanks made after 2010. The tank must be 2-phase, which most 3 kW models are. If you are unsure about your tank, we check it with you — before you commit to anything.
Hot water when you need it
The water in the tank is hot when you want a shower — you will not notice a difference day to day. If you want to take control yourself, you can pause the control at any time in the app. All data is sent encrypted.
From connection to first payout
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01
Month 1
The device collects data.
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02
Then
Energinet tests the device.
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03
About 30 days
Approval is completed.
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04
After 2–3 months
First quarterly payout.
Is HeatSync right for you?
- You have a Metro Therm hot water tank made after 2010, and it is 2-phase.
- There is 2.4 GHz wifi at the tank — a 5 GHz-only network is not enough.
- There is power at the tank for the control unit.
- You are willing to give access to data from your electricity meter. This happens automatically once you have given consent.
- Your home is in East Denmark (DK2). We only cover DK2 for now.
Already have a Shelly?
If a Shelly already controls your water heater or immersion heater, you can sign it up for free — see the Shelly integration.
What will I earn?
Your earnings depend on FCR-D prices, which are set at daily auctions, and on the size of your tank. Try the earnings calculator.
Earnings depend on, among other things, market prices, Energinet's needs, regulation and your own consumption and equipment, and they can change over time. FCR-D prices are set in daily auctions. Historical earnings are no guarantee of future earnings.
Frequently asked questions
When can I buy HeatSync?
HeatSync is coming soon. Contact us if you would like to hear more.
Does it affect my hot water?
No. The water is hot when you need it — you will not notice a difference day to day.
How long does the installation take?
Typically about 20 minutes. A licensed electrician fits HeatSync to your hot water tank, and we put you in touch with one in your area.
Can I pause the control?
Yes, at any time in the app.
More questions and answers are in our FAQ.
Read more
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Immersion heater and hot water tank: from cost to income
The immersion heater and electric water heater are among a home's most flexible devices: the water stores heat, so consumption can shift — and sell as reserves.
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Heat pump, water heater or battery: which suits flexibility best?
Heat pumps, electric water heaters and home batteries can all deliver grid flexibility. Compare reaction time, comfort and installation — and find your device.
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Grid balancing for households: earn from your home's flexibility
Private households can now take part in grid balancing: your heat pump, water heater or home battery sells flexibility to Energinet — and you share the revenue.
