This whole thread has way too many people who see the price as some kind of made up number that dictates how people behave, rather than recognizing that the price is a signal about the availability of useful real-world resources.

Even if the prices were strictly mandated by a centrally planned tariff that kept the same price throughout the day, every day, we'd still have the engineering challenge of how to match the energy fed into the grid versus taken out of the grid.

The prices are just a reflection of that technical issue, so solving it still needs to be done.