99 percent cheaper. In one human lifetime. No technology on Earth has ever done what solar just did.

 

99 percent cheaper. In one human lifetime. No technology on Earth has ever done what solar just did.

In 1976, a single watt of solar panel capacity cost approximately $106. Today it costs less than $0.20. That is not a typo and it is not adjusted for inflation in some favorable direction — it is the raw, nominal price collapse of the most remarkable cost curve in the history of manufactured technology. A solar panel that would have cost a family's entire annual income in the 1970s now costs less than a restaurant meal per panel. The transformation is so extreme that it routinely causes disbelief even among energy professionals who lived through it.

The mechanism behind this collapse is what economists call learning curves or Wright's Law — for every doubling of cumulative production volume, costs fall by a consistent percentage. Solar panels have followed their learning curve with unusual fidelity for nearly fifty years. Each time global production doubled, panel costs fell by roughly 20 to 25 percent. Production has doubled many times over, and the cost reductions compounded accordingly. The curve has not flattened, bent, or broken. It has continued with extraordinary regularity across five decades of very different economic conditions, supply chains, and geopolitical environments.

What the learning curve predicts for the future is more of the same. Solar production is still scaling. Costs are still falling. The 99 percent drop is not the end of the story — it is the setup for the next chapter. Energy economists who model long-run solar costs using the historical learning rate arrive at future prices that seem implausible today, just as today's prices seemed implausible in 1976.

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