Tangentially related gripe: My biggest issue in making this work reliably is that my "smart" thermostat is trying to be too smart. Our power gets cheap at 10p

Tangentially related gripe: My biggest issue in making this work reliably is that my "smart" thermostat is trying to be too smart. Our power gets cheap at 10pm. I can't just set my HVAC to turn on at 10 and go full blast until power gets expensive again at 6am. I have to program a set temperature at a time. if I set that at 10pm, my thermostat tries to make sure that it _reaches_ that temp at exactly the time. So it will actually turn on an hour early. So I have to guess how long it will take my HVAC system to reach whatever temperature I have it set to, and then set it for that much time _after_ 10PM. It's inexact and annoying, and means that I am leaving performance on the table. I have idly searched a few times for a replacement thermostat that would interact locally with home assistant and have had zero luck (partially due to the fact that my system is complicated and seems to have a non-standard wiring setup). Everything else: hot water heater, EV, laundry, etc. are all trivially easy to make run during the desired periods. But the biggest use of energy I have (yes, larger than charging the car) is a PITA to make it play well with TOU billing.