Agora said renewable energy support should be capped at EUR 0.089 per kWh. Furthermore from 2017, offshore wind should be granted an innovation premium of EUR 0.05 per kWh for a maximum 500MW per year to be selected in a tendering procedure.
"Wind offshore is still in the relatively expensive innovation phase. A continued expansion should be enabled but without building too much too early as this would be very expensive for consumers," it argued in the document released 10 October.
"We can't support the suggestion in this form," commented Andreas Wagner, managing director of the German offshore wind foundation Stiftung Offshore.
"The proposal for introducing a tendering mechanism within such a short time-scale creates more uncertainty at a time when we urgently await investment decisions to ensure continuity of offshore development," he stressed.
With a total of roughly 2.5GW operating by end-2015, investment decisions for the next 3-5GW are needed, he said.