Chancellor Angela Merkel hammered out the framework for a deal with state premiers on Wednesday on reforms to Germany's renewable energy law aimed at curbing the costs and controlling the speed of the future roll-out of green power sources.
After a meeting with the leaders of Germany's 16 states that stretched into the early hours of Wednesday, the government agreed to limit the expansion of onshore wind at 2.8 gigawatts in capacity per year, equivalent to about 1,000 wind turbines.
In addition, only a certain amount of new capacity will be permitted in north Germany to avoid overburdening the electricity grid.
"We have come a long way," Merkel told reporters following the meeting.
Saxony-Anhalt Premier Reiner Haseloff spoke of a "breakthrough," while his counterpart in Bremen, Carsten Sieling, said they had covered 90 percent of the ground.