Solar PV Installations Will Reach Up To 660 Gigawatts In 2024 - CleanTechnica

Like capacity x capacity factor, e.g. if your 100MW site produces power 50% of the time (because of nighttime, clouds, etc) then it would produce, over the course of a year 100,000,000 x 24 x 365 x 0.5 = 438 GWh annually (very simplified).