Solar now requires no more upfront capital than coal or gas to produce the same annual electricity, reversing a disadvantage that was as large as five-to-one a decade ago.
Major issue with spinning up turbines over night is the actual gas turbine unit ramp rates. Meaning how quickly they can go from cold and offline to hot and full output. Some units take upwards of 8 hours to get to their full output.
And the peak load of an average grid is right when the sun is setting and everyone is getting home from work, around 5 in the afternoon.
At that time, solar is dropping fast, and you don’t have time to start up your slow units, they’d have to already be online.
So utilities are often forced to leave their gas units online, even when solar is pumping out power, just to have them ready for the peak demand (and also have them for night).
Major issue with spinning up turbines over night is the actual gas turbine unit ramp rates. Meaning how quickly they can go from cold and offline to hot and full output. Some units take upwards of 8 hours to get to their full output.
And the peak load of an average grid is right when the sun is setting and everyone is getting home from work, around 5 in the afternoon.
At that time, solar is dropping fast, and you don’t have time to start up your slow units, they’d have to already be online.
So utilities are often forced to leave their gas units online, even when solar is pumping out power, just to have them ready for the peak demand (and also have them for night).