Lantern
The reason Yr Right said about the 500 tons is because he said in post #106 that the foundations used "500 tons, give or take".
All these wind farms state such huge figures, be it houses powered, MW generated but very rarely if at all do they ever produce that amount.
Just look at the Graphs on the link provided by me on the previous page and again by someone else above. NONE of the wind farms generate much power and the average over all of them is pathetic.