Citation please? According to here a typical offshore wind turbine will pay back its life cycle energy cost in 0.57 years: https://www.wind-energy-the-facts.org/energy-balance-analysi... (0.55 for on-shore)

Here is another article stating a payback time of 12.3 months: https://www.researchgate.net/publication/257564430_Life_Cycl...