It would be awesome that if we have a fixed price lf electricity, we add it in the configuration of the energy panel and then select it from the list option when configuring an entity.
It would be more awesome if you could configure several fixed prices just in case someone has various, like one for the house and other for an electric car charger.
It’s pretty easy to set a helper with the electric cost. That’s what I do so it’s available anywhere in HA.