Which Daikin models work with Elewatt via Onecta?

Any Daikin heat pump or air-conditioning unit that supports the Daikin Onecta app (formerly Daikin Residential Controller) and is paired with your Onecta account. This includes most Altherma, Stylish, Perfera and Sensira series from roughly 2018 onward. If your unit shows up in the Onecta app it can be controlled by Elewatt.

Is it safe to switch a heat pump on and off based on electricity price?

Yes, when done sensibly. We recommend switching the operating mode and target temperature instead of turning the device fully off every cycle — for example, dropping to a lower setpoint during peak hours rather than power-cycling the unit. This is gentler on the inverter compressor and keeps the home thermally buffered. Modern Daikin heat pumps are designed for smart-grid scheduling and handle frequent setpoint changes well. Elewatt schedules in 15-minute or 1-hour blocks rather than rapid cycling, and you can set minimum on/off durations in the price filter to protect the compressor.

Will I lose comfort if my heat pump only runs during cheap hours?

Not if your home has typical thermal inertia. Walls, floors and especially underfloor heating act as a thermal battery: heat charged during cheap hours coasts your indoor temperature through expensive hours. Elewatt also lets you set a minimum runtime per day so comfort is never compromised.

Do I need any extra hardware?

No. As long as your Daikin is connected to your home Wi-Fi and visible in the Onecta app, Elewatt talks to it through the official Daikin Onecta cloud API — no smart plug, relay or local hub required.

How long does setup take?

Most users complete setup in 10–20 minutes: 5 minutes to pair the heat pump in the Onecta app, 5 minutes to create your Elewatt account and price filter, and 5 minutes to authorise the Onecta integration and link the device.

Does this work alongside Daikin's own scheduling?

Yes. Elewatt sets the on/off schedule based on price; your Daikin's own thermostat, climate curve and target temperatures keep working as before. You can disable Elewatt's schedule at any time from the Elewatt dashboard and the heat pump will revert to its standard behaviour.

Heat Pump + Onecta Cloud

Daikin Onecta

Connect your Daikin heat pump to Elewatt through the Daikin Onecta cloud and let your home heat — or your hot water tank reheat — automatically during the cheapest electricity hours of the day.

Reedik Lindau

Published 26 April 2026 · Updated 6 October 2026

Key features

Daikin Onecta cloud API

Heating + cooling + DHW

Typical SCOP 3.5–4.5

Whole-home climate

Alexa, Google Assistant

Smart hourly scheduling

Savings Calculator

How much can your heat pump save?

Enter your annual heat-pump electricity consumption and how many hours per day it can be load-shifted to see how much Elewatt saves by running it during the cheapest hours.

Annual electricity (kWh)

Run hours/day

Shiftable share (%)

Daily energy · Time

13.7 kWh · ~12 h

Spot price avg (last 12 months) · c/kWh

0:00 · 14.0c

1:00 · 13.9c

2:00 · 13.0c

3:00 · 12.6c

4:00 · 12.5c

5:00 · 13.1c

6:00 · 16.1c

7:00 · 22.2c

8:00 · 24.5c

9:00 · 26.3c

10:00 · 24.0c

11:00 · 22.5c

12:00 · 18.3c

13:00 · 18.2c

14:00 · 18.2c

15:00 · 18.6c

16:00 · 23.0c

17:00 · 24.6c

18:00 · 27.2c

19:00 · 29.2c

20:00 · 26.3c

21:00 · 24.6c

22:00 · 18.6c

23:00 · 16.2c

Cheapest 12hPeak 12h

With Elewatt

15.4 c/kWh

2.36 €

Without Elewatt

24.4 c/kWh

3.10 €

Your savings

Per day

0.74 €

Per month

22.26 €

Per year

270.87 €

12-month avg spot prices, Estonia. Assumes the shiftable share of your daily heat-pump electricity is concentrated in the cheapest hours. Grid fees: Elektrilevi.

How to set it up

From a paired Daikin to automatic cheap-hour heating in 5 simple steps. Takes about 15 minutes.

Set up your Daikin heat pump in the Onecta app

Download the Daikin Onecta app (iOS or Android) and follow the in-app pairing wizard to connect your heat pump to your home Wi-Fi. Make sure to assign it a name you'll recognise (e.g. 'Heat Pump') and confirm that you can see live status and adjust temperatures from the app.

Add your contract and price filter in Elewatt

In Elewatt, go to Contracts and add your electricity tariff. Then go to Filters and add a new price filter — this defines when you want the heat pump to run based on the electricity spot price or the cheapest hours of the day.

Authenticate with Daikin Onecta

In Elewatt, go to Connections → Daikin Onecta and click Connect. You'll be redirected to Daikin to sign in with your Onecta account and authorise Elewatt. After approval you'll be sent back to Elewatt — your paired heat pump will appear in the device list automatically.

Link your Daikin to the price filter

In Elewatt under Connections → Daikin Onecta, find your heat pump and select the price filter you created. Elewatt will now calculate the optimal on/off schedule each day based on tomorrow's electricity prices and push it to the device through the Onecta cloud.

Start saving! Here's your projected annual saving:

That's it! Elewatt now automatically runs your heat pump during the cheapest electricity hours and pauses it during expensive ones. Based on your calculator settings, here's what you save:

Per day

0.45 €

Per month

13.50 €

Per year

164.25 €

Adjust the calculator above to see your personalised savings.

Ready to start saving?

Pair your Daikin in the Onecta app, create a free Elewatt account and authorise the integration in minutes.

Create Free Account Features

AI-assisted, human-reviewed — an editor checks every article before publication. Read our editorial policy

Daikin Onecta

Key features

How much can your heat pump save?

How to set it up

Set up your Daikin heat pump in the Onecta app

Add your contract and price filter in Elewatt

Authenticate with Daikin Onecta

Link your Daikin to the price filter

Start saving! Here's your projected annual saving:

Ready to start saving?

Frequently Asked Questions

Other guides

Housing co-op electricity: cut common costs

Energy management for small businesses, no BMS

Rental property electricity: real-time monitoring