If you’ve already got smart grid control set up for your Daikin heat pump, you’re used to your space heating leaning into the cheapest hours of the day, based on Nord Pool spot prices. But your domestic hot water tank has been running on its own schedule the whole time, happy to reheat itself during the most expensive hour of the day, right along with everyone else on the grid.
Now it doesn’t have to.
The problem with a dumb hot water tank
With this turned on, your hot water tank pauses heating during the pricier hours of the day and picks back up during the cheapest, off-peak hours instead. No need to watch prices or time your showers around them. It just happens in the background, the same way your space heating already adapts.
How it decides
It’s careful about it. If the tank runs low no matter what the price is doing, heating resumes immediately, so you’ll never trade a lower bill for a cold shower. And if you ever kick off the tank’s own boost or powerful mode by hand, that takes priority too.
It’s also not flipping on and off all day chasing every small price wiggle. It only changes its mind once prices have moved clearly into cheap or expensive territory, so the tank settles into a steady rhythm instead of short-cycling.
Turning it on
This is opt-in, and it only shows up for hot water tanks your Daikin system can actually control this way. If you don’t see the option, your installation just doesn’t support it yet.
If you do, look for the “Pause during price peaks” switch under Domestic hot water in your device settings. Turn it on and it takes effect on the next control cycle, no re-authentication or restart needed. Your device’s activity log will show exactly when and why heating was turned on or off, so you can see it working rather than just trusting it.
Your hot water tank now follows the price of electricity, same as the rest of your home. If you haven’t yet, that’s also the story behind how your space heating already does it.