Wind turbine replacements to cost trillions by 2050

A looming second wave of the global energy transition could place unprecedented strain on resources, supply chains, and public finances, as most of today’s wind and solar infrastructure approaches the end of its working life by mid-century.

Climate researcher and author Peter Clack warns that by 2050 the majority of the world’s roughly 225,000 wind turbines—representing more than 1.2 terawatts of capacity—will need to be decommissioned or rebuilt, just as governments and companies are simultaneously pushing to install vast amounts of new renewable generation.

Wind turbines typically operate for 20 to 30 years, meaning the coming decades will require large-scale repowering alongside fresh construction. This overlap is expected to intensify competition for key materials such as steel, concrete, copper, and critical minerals, particularly rare earths. China currently dominates global processing of these materials, refining an estimated 85 to 95 percent of rare earth supply, raising concerns about geopolitical and supply-chain vulnerabilities.

Solar power faces a similar challenge. Modern solar panels have lifespans of around 25 to 35 years, and by 2050 billions of panels from today’s installed base—now exceeding 2.2 terawatts globally—will need to be retired and replaced. The cost of scrapping and rebuilding solar infrastructure is expected to run into the hundreds of billions of dollars, adding further pressure to the already vast financial burden of ‘decarbonisation’.

According to estimates cited by McKinsey, achieving net-zero emissions by 2050 will require around US$275 trillion in total physical asset spending, averaging US$9.2 trillion per year. Of that, roughly US$3.5 trillion annually represents spending above current investment levels. The added cost of replacing ageing renewable assets could significantly inflate that figure.

Material intensity is a major concern. Larger modern wind turbines, particularly direct-drive models, can require between half a tonne and two tonnes of rare-earth permanent magnets per megawatt of capacity, in addition to enormous quantities of steel and concrete. Blade disposal presents another growing issue, with an estimated 43 million tonnes of wind turbine blade waste expected globally by 2050, including around 2 million tonnes in the United States alone.

Critics describe this looming rebuild as a “second transition” that could demand a level of industrial mobilisation comparable to wartime efforts. Unlike the initial rollout of renewables, however, it may occur in an environment of reduced subsidies, tighter restrictions on fossil fuels—despite diesel still powering much of the world’s mining equipment—and more cautious private investors following uneven returns from renewable projects.

By 2050, most of today’s 225,000 wind turbines (over 1.2 TW capacity) will be near the end of their 20–30 year lives, requiring waves of decommissioning or repowering. This rebuild will coincide with massive new installations, intensifying competition for steel, concrete, copper,… pic.twitter.com/2ui7lys4bN

— Peter Clack (@PeterDClack) January 6, 2026