Over the last months two new wind turbines were erected about three miles from my place. These are the biggest ones on can currently buy with a maximum output above 6 megawatt each. Yesterday the blades for the second one were lifted to the top of the 135 meter high tower. The crane used was the very first brand new Demag CC9800-1 and the lifted nose section with the three rotor blades weighed 369 metric tons.

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Expected output from one of these is 20 million kilo watt-hours per year, enough for 5,000+ (European) households. High of the hub is 442 feet (135m), the rotor diameter 416 feet (127m), tower base diameter 48 feet (14,5m) – more here (pdf, page 6f).
To really get the size of this machine find the person in this picture:

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The pictures are not mine, but stolen from a friend. More pictures of the lift are here and here
The whole setting up (and the cranes used) can be seen in this thread in a German crane-forum by navigating forward with the page-numbers ("Seiten") on the bottom.