By Richard Martin | The Strategic Code
It is often pointed out that wind and solar now attract the bulk of new investment in global energy. That fact is true, but it is not the same as demonstrating that these investments can produce energy at the scale, density, and reliability of fossil fuels, nuclear, or hydro. Capital allocation reflects many influences—political preferences, subsidies, financial incentives, and social visibility—not just the physics of energy delivery.
The real question is not how many dollars are spent, but how many watts or joules are delivered per dollar over the full lifecycle of the asset. Fossil fuels, nuclear, and hydro have consistently provided high energy return on investment because they combine density with reliability. Their capacity factors often range from 50 to 90 percent, meaning they generate close to their rated capacity nearly all the time. Wind and solar, by contrast, typically range between 15 and 40 percent, and only when the weather and daylight cooperate.
This means that a billion dollars invested in wind or solar does not yield the same continuous power as a billion dollars invested in gas, coal, nuclear, or hydro. Add to this the cost of backup systems, long-distance transmission, and storage to compensate for intermittency, and the true delivered energy per dollar drops further.
Hydro is a telling case. It predates electricity as a usable energy source because of its cost-effectiveness and physical efficiency. Where it is geographically feasible, it remains one of the best returns on investment in terms of energy delivered per dollar. Nuclear, despite high upfront capital costs, pays back over decades of high-capacity, low-carbon baseload generation. Fossil fuels dominate not because they are politically favored, but because they remain the most energy-dense and flexible forms of fuel.
Investment patterns therefore tell us little about physical adequacy. Bubbles, political support, and optimism can direct capital, but physics dictates results. The dominance of fossil fuels and the persistence of nuclear and hydro come from their ability to deliver vast, reliable quantities of energy at scale. Wind and solar will grow in absolute terms, as they should, but believing that investment flows alone prove their sufficiency is to confuse financial fashion with physical reality.
If the aim is true decarbonization, investment must be measured not by percentages of total dollars spent, but by energy actually delivered per dollar invested across the system. That arithmetic favors a balanced portfolio—one in which wind and solar play an important role, but not the dominant one.
About the Author
Richard Martin equips leaders to achieve strategic alignment through nested hierarchical action, harnessing initiative for maximal effectiveness with minimal friction.
www.thestrategiccode.com
© 2025 Richard Martin
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