This is determined based on the overall life of the equipment
The wind turbine has been in mechanical motion for a long time. Through numerous experimental studies, it has been determined that the overall lifespan is essentially around $1,000,000. 20 years. This is still the time when the wind turbine is regularly programmed according to the relevant specifications. Which can only be achieved by inspecting and eliminating defects.
The lifespan of photovoltaic power generation depends on the degradation rate of photovoltaic modules. After 25 years, the modules will decay to a relatively low level and will no longer be suitable for continuous electricity production. If manufacturers develop components with very low attenuation rates, the overall lifespan of photovoltaic power generation will continue to be extended.