The problem is that grid scale power plants can't just turn on when the sun isn't shining. If the negative prices during the day and positive prices at night lead to energy storage, then it's a solution. Otherwise, it's just a glut at some times of day.
This is where grid scale batteries come in. Looking forward to that. (As long as they can avoid blowing up like the one in Monterey…)
>The problem is that grid scale power plants can't just turn on when the sun isn't shining
They can, though? Batteries can offset the start-up times, otherwise gas plants can start up within minutes and nuclear can ramp up within days
"Days" is too long when you need power at night. Coal and gas combined cycle plants take too long just like nuclear.
Turbines could work. But that's not the majority of plants.