In my experience, at least in the midwest USA, electric companies give you a choice between a flat rate or "time of use" pricing. You can pick whichever you pre

In my experience, at least in the midwest USA, electric companies give you a choice between a flat rate or "time of use" pricing. You can pick whichever you prefer, and switch between them if you want to try a different one. "Time of use" charges more for kWh use during peak hours and less during off-peak. Depending on your usage patterns it can be cheaper to do time of use pricing.