Does a wind turbine generate more energy than it takes to produce the turbine?

It depends on time and location.

If you place your windmill on top of a hill, it will be the most efficient. But as for your question, its down to the matter of time. How long is the windmill going to be running for?

If 2000Kw where used to produce a windmill.. and the windmill produced 1000Kw a year, it would make its effiency in 2 years. This is called pay back time!

Hope this helps!!