I need to look into this again. I had it installed at the beginning of the winter and found it wonky. Heating during peak hours and not doing a thing when we pay .02$/kWh
I definitely take advantage. I have solar panels that generate a moderate amount of energy, heat pump, and electric (heat pump) furnace and hot water tank plus two electric cars. Home Assistant has been such a dream to maximize the low energy and self-generated energy.
I have debated adding some batteries, but the amount of energy we use, especially at -30 c, it's cost prohibitive.
yes, you should definitely check regularly if the Automation does what you want, there are some stumbling blocks e.g. Difference of presence detection and persons. I spent about a month until I've understand enough so that it does what I want :)
I whish you could control many thermostats with many external termometers...
But I need to run many copies of this automation, one for each room of my house!