if i have a wind turbine with a rated output of 2.5MW, how much output will i get per year ?

Answer 1

It really depends on the location and the wind patterns.

A modern wind turbine might be rated at 2.5 MW, however it will produce significantly less during periods of low wind.

I know of a wind farm with dozens of modern wind turbines where the peak output never exceeded 90% of the sum of the nameplates of the individual turbines. Over the course of one year, it only produced 20% of its theoretical capacity. (i.e. 20% annual load factor)

Answer 2

You will just have to change it to kilowatt/hours.
For instance, you will get 2.5MWHrs every hour that the turbine is running at the correct speed.
Now you have to have a guess, or work out how long the machine will actually doing that. Take into consideration the times when there is less or no wind etc.
Then multiply actual run hours x MHhrs and that will be the total output for the year. (MHhrs/year