from the article:
"This year, German consumers will be forced to pay €20 billion ($26 billion) for electricity from solar, wind and biogas plants -- electricity with a market price of just over €3 billion. Even the figure of €20 billion is disputable if you include all the unintended costs and collateral damage associated with the project. "
If the article is correct, paying 20 billion Euros for something that has a normal market price of 3 billion euros seems pretty expensive and inefficient to me.