How many volt can a windmill make?

Answer 1

At present the largest windmills can produce up to about 8 million watts each. As a practical matter, this much power needs to be delivered at a high voltage such as 14 thousand volts or even higher. (Otherwise the current would be too high for reasonably sized conductors to carry.)

On the other hand, small windmills might deliver at much lower voltage such as 480 volts.