It most likely takes longer to build wind turbine farms than solar panel farms. For one, wind turbines are incredibly large and require permits and consultations in order to build. This involves a variety of government agencies, and shipping coordination.
Solar panel farms also require permits and consultations, but the actual product is so much smaller that its shipping is likely much easier to coordinate.
Although wind turbines take longer to build, it should be noted that they have a higher energy return on investment than solar panels. A comparative analysis of the Vestas V90-3.0 MW Wind Turbine with Photovoltaic solar panels (PV) found that it takes “23,822,339 kWh more to produce 48704 solar panels than it takes to produce one wind turbine,” resulting in a 36.5:1 energy return on investment for wind power as opposed to a 5:1 energy return on investment for solar power. In addition, the amount of C02 produced by wind power was 4.64 kg of C02 per 1kWh, in comparison to solar power, which produced 70 grams of C02 per 1kWh.
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