Every so often, your hot water tank runs low right in the middle of the day’s most expensive electricity hour. Not because the price didn’t matter, it did, but because a cold shower matters more, so heating switches back on no matter what it costs in that moment.
I’ve made that easier to avoid.
How it decides
Your tank now looks at how fast it’s been cooling and works out roughly when it would run low anyway. If that point looks like it’s going to land during an expensive stretch, it heats up early instead, while the price is still low, catching the cheaper window rather than getting caught by the expensive one.
It only steps in when it’s genuinely confident, based on a clear, steady cooling trend over the last few hours, not a guess. A shower or a bath won’t throw it off by accident. If it isn’t sure, nothing changes, it just falls back to reacting at the floor like it always has.
Turning it on
There’s no separate setting for this. It’s part of the same “Pause during price peaks” toggle already in your hot water tank’s device settings. If you’ve already turned that on, this is already working for you. If you haven’t, that’s where to start.
Your hot water tank now gets ahead of expensive hours instead of only reacting once they’ve already arrived.