They constantly revise their forecast upward to try to keep pace with reality. - In 2021, they said 2023 would bring 218GW of installation.
- In 2022, they said 257GW. In 2023, they said 406GW.
BNEF, a Bloomberg subsidiary, tried the same. But the reality was that 447GW were deployed—more than twice their original predictions. And it made exactly the same mistake in 2024. The trouble with solar predictions is that no one has learned the lesson from the last 70 years of solar. The experts are still assuming linear growth. But solar is growing exponentially. From that first Ferris wheel, through the ‘80s and ‘90s and early ’00s, it looked like solar was barely moving. Now all at once—this year—solar is becoming the global standard for electricity generation. Growth at the Speed of Light To understand where solar is actually headed, take past reality and work forward from there. Here’s how rapidly solar deployment has grown—for the past two decades: - In 2004, it took one year to install 1 GW of solar power.
- In 2010, it took one month.
- In 2016, it took one week.
- In 2024, it took about 12 hours.
That’s the equivalent of 3.4 football fields of solar installed every minute. Here’s what that looks like over the past 15 years. Note that the y-axis in the chart below is exponential—and solar is breaking out above that trendline. |
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