'200 MW peak capacity at 60% efficiency translates to 120 MW peak electric energy'. This sentence makes no sense. They are building a 200MW plant. That is the amount of electricity it will put out at peak.
You made up the number for 50% capacity figure just then didn't you? You did. I just saw you. So your final figure is wrong.
http://www.enviromission.com.au/IRM/Company/ShowPage.aspx?CP...
Makes sense, since half of the time it's night...
My reason for assuming that the "200" is not the electrical net output is that they write "MW", not "MWe". I have become quite cynical about the numbers on nameplates; they simply stick the biggest number on the thing that somehow appears in the calculation. Maybe I am wrong, and that is actually the peak electrical output.
However, that peak is only reached at noon in june. So, perhaps the actual yearly average output is 80 MW. Perhaps it is even 100 MW. It is still a big toy, and an expensive one at that.