> the US doesn't seem to have real time pricing of electricity "The US" is a big place. Depends which city/county you're in and who is providing the electric s

> the US doesn't seem to have real time pricing of electricity "The US" is a big place. Depends which city/county you're in and who is providing the electric service. > I can see the spot price in real time in an app. That sounds like a nightmare. Does it really change hourly? How can you program your systems to use the most efficient rate if you have no idea in advance what it is? Here in PG&E California we have time of use tiers, but they are known. So I can for example let the EV start charging only at midnight when the cheapest tier kicks in. But I know it is cheap midnight to 3pm, brutally expensive 3pm to 9pm and fairly expensive 9pm to midnight.