For decades, “expensive and unreliable” has been the default verdict on wind power—a judgment that has quietly steered governments toward nuclear and fossil fuels when building out their energy grids.
A sweeping global review led by the University of Surrey challenged that assumption on two fronts. Offshore wind has become dramatically cheaper than nuclear power, the researchers found. And in a conclusion few saw coming, wind turbines may have had the power to prevent one of the worst nuclear disasters in modern history.
The stubborn myth of expensive wind power
For as long as energy policy debates have existed, wind power has carried a reputation as the expensive idealist’s choice—cleaner than coal or gas, perhaps, but a burden on consumers and public finances. That perception has shaped real decisions. Governments across the UK and beyond have greenlit nuclear projects and extended fossil fuel contracts partly on the assumption that wind simply could not compete on cost.
The University of Surrey review, published in the National Institute Economic Review, took direct aim at that assumption. Led by Professor Suby Bhattacharya, it synthesizes updated global data to arrive at a conclusion the researchers summarize plainly: greener is cheaper.
How far wind costs have actually fallen
The numbers behind that claim are striking. The lifetime cost of generating wind power in the UK has fallen from £160 per megawatt-hour to just £44 per megawatt-hour—a figure that covers planning, construction, operation, and eventual decommissioning. The full picture, in other words.
For context, the UK government agreed to pay £92.50 per megawatt-hour for electricity from Hinkley Point C, the nuclear station under construction in Somerset. Offshore wind now costs less than half as much per unit of energy as new nuclear.
Two forces are driving this shift. Construction costs for turbines have fallen steadily as manufacturing scales up and engineering techniques improve. Wind also carries a structural advantage no nuclear or gas plant can match: the fuel is free. No uranium contracts to negotiate, no gas prices to hedge against. Once a turbine is built, the wind simply blows.
Wind turbines and the Fukushima connection
In March 2011, a magnitude 9.0 earthquake and the tsunami it triggered knocked out the cooling systems at Japan’s Fukushima Daiichi nuclear plant. Without power to keep the reactors cool, three of them melted down in one of the worst nuclear accidents since Chernobyl.
The Surrey review raised an unexpected counterfactual. Offshore wind turbines, the researchers argue, could have kept those cooling systems running during the crisis—supplying the emergency power needed to prevent meltdown, a role no one had previously considered wind energy capable of playing. The review also noted that wind farms are structurally less vulnerable to earthquakes than nuclear facilities, which reframes offshore wind not just as an electricity source but as potential resilience infrastructure in seismically active regions.
Solving the intermittency problem: Storage and hydrogen
The most persistent criticism of wind power is its dependence on weather. When the wind drops, so does output. Critics have long used this variability to argue that wind cannot serve as a reliable foundation for a national grid.
The review points to two emerging solutions. Battery storage is one path forward—the planned Ishikari offshore wind project off the coast of Hokkaido, Japan, is being designed with battery systems specifically intended to smooth out gaps between generation and demand. The second option is hydrogen: surplus wind energy can split water molecules and produce hydrogen from seawater, a fuel that can be stored, transported, and used wherever it is needed. Together, these approaches suggest the reliability gap, long cited as wind’s fatal flaw, is increasingly a solvable engineering problem.
A planet’s worth of untapped potential
The scale of what remains untapped is considerable. The review estimated there is enough wind energy circulating around the world to power the entire planet 18 times over. The resource itself is not the constraint.
Progress is also being made on ecological concerns that have complicated wind’s green credentials. Impacts on wildlife and marine environments are being reduced through new construction methods that simultaneously bring down costs—a rare alignment of economic and environmental incentives that does not come along often in energy policy.
As battery storage matures, hydrogen infrastructure develops, and turbine costs continue falling, the question for policymakers is no longer whether offshore wind can compete. The Surrey review suggested the more pressing question is how quickly countries are prepared to act on what the data already shows.
Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.
