? The case for radical solar optimism
While politics is powerful, the laws of physics will always win
The Strait of Hormuz, a mere twenty-one miles wide at its narrowest, is a chokepoint through which flows a fifth of the world's oil. When it closed last week, it sent shockwaves through global markets, knocking 20 million barrels a day off the supply and pushing the price of a barrel of oil past $100. This stark reminder of our civilization's dependence on finite resources highlights the urgent need for a shift towards renewable energy. While politics and geopolitics play significant roles in shaping energy markets, the laws of physics and economics offer a path towards a more sustainable future.
Electricity grids have long moved beyond oil, but there are still two billion internal combustion engines on the roads, each tethered to a depletion curve that yields less as more is extracted. The current oil crisis makes scarcity seem permanent, but this is an illusion. The key lies in the contrast between two curves: depletion and learning. Oil follows the depletion curve, where extraction becomes more expensive as reserves dwindle. In contrast, solar energy follows the learning curve, where cumulative production drives down costs.
Over the past fifty years, every doubling of solar photovoltaic module production has cut prices by 23.7%. Solar panels cost $1,000 per watt in 1958, while the cheapest modules today cost just seven cents per watt. The two curves crossed a decade ago, but only the solar curve is still falling. This distinction between scarcity and abundance is pivotal, and abundance is winning.
The solar supercycle is a self-reinforcing loop where each cost reduction unlocks new markets, and each new market fuels further reductions. As solar prices continue to plummet, a range of industries and applications become economically viable. Desalination, once a costly endeavor, is now within reach for solar-powered water treatment plants. The production of green steel, which uses hydrogen derived from renewable energy, is becoming more feasible as solar-powered electrolyzers reduce hydrogen costs. Direct air capture, a technology that removes carbon dioxide from the atmosphere, is also poised to benefit from the falling cost of solar energy.
However, skeptics argue that solar energy faces significant challenges, such as intermittency, land use, geopolitics, and supply chain disruptions. They question whether the learning rate will continue to accelerate. To address these concerns, we must stress-test the solar supercycle thesis. While intermittency remains a challenge, advancements in energy storage and grid management are mitigating its impact. Land use concerns can be addressed through efficient deployment strategies and the development of floating solar farms. Geopolitical risks can be minimized by diversifying supply chains and investing in local production. The risk of slowing learning rates is mitigated by the sheer scale of investment and the global collaboration driving innovation.
In conclusion, the case for radical solar optimism is grounded in the inexorable progress of technology and the economic imperatives of the learning curve. While challenges persist, they are not insurmountable. The solar supercycle offers a path towards a sustainable energy future, one that transcends the limits of finite resources and geopolitical tensions. As we continue to unlock new markets and drive down costs, the transition to a solar-powered world becomes not just a possibility, but an inevitability.
