What is a "nacelle?"

A nacelle is prepared for mounting on a tower

A nacelle is placed on top a tower with a crane
When people start discussing wind turbines and generating electricity from wind, terms may be used that might be unfamiliar. In addition to typical terms used in electricity generation, words such as capacity factor, nacelle, net metering and wind power density are commonly used.

To navigate this new terminology terrain, the folks at the Plains Organization for Wind Energy Resources assembled a mini-glossary of wind words that can help. This glossary is available at

And what does “nacelle” mean?  It is the structure at the top of the turbine that is separate from the blades and comprises the rotor shaft, gearbox and generator.
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