The currently biggest are Enercon's E-112 (second batch) and E-126 at 6 MW, but the E-126 are probably suided for an up-rate (for comparison: the first batch E-112 were rated for 4.5 MW).

American companies are aiming for bigger: Clipper Windpower for 7.5 MW, while AMSC Windtec aims for 10 MW; but I suspect these aren't to be taken that seriously.

_{*Lunatic*, n.
One whose delusions are out of fashion.}

The 5MW turbines are barely out of the prototype stage yet. The big manufacturers are keeping ilent about their future models, but it's likely that they are working on bigger ones.

In the long run, we're all dead. John Maynard Keynes