Renewables power up Germany

Clean power supplied almost all Germany’s power demand for the first time over the weekend, marking a milestone for Chancellor Angela Merkel’s Energiewende policy to boost renewables while phasing out nuclear and fossil fuels.

Solar and wind power peaked at 2pm on Sunday, allowing renewables to supply 45.5GW of the 45.8GW demand, according to provisional data by Agora Energiewende, a research institute in Berlin. Power prices dropped as low as minus €50 a megawatt-hour on the day, according to data from Epex Spot.

Countries across Europe are building increasing amounts of renewable capacity to reduce their carbon emissions and boost supply security.

Last year, Denmark’s wind farms supplied 140% of demand, and the United Kingdom had no coal-fired power stations meeting electricity demand for about four hours on May 10 as a result of plant breakdowns.

“Events like t his highlight that eventually we may need to start curtailing because of market-wide oversupply,” said Monne Depraetere, an analyst for Bloomberg New Energy Finance.

“In the long run, that may provide a case to build technologies that can manage this oversupply — for example, more interconnectors or energy storage.”

Renewables were only able to meet demand because of Germany’s strong export capability, the analyst said. Even when solar and wind peaked, conventional power plants were still supplying 7.7GW.

Merkel’s unprecedented shift to clean energy has squeezed mar- gins at coal and gas plants while driving up costs for consumers in Europe’s biggest power market. The increased flows of clean energy have also put pressure on the grid to the point that the country is considering excluding some regions from future onshore wind power auctions if local grids are already struggling to keep up with large volumes of renewable energy supplies.

“If Germany was an island, with no export cables, this would be technically impossible because you always need to have some thermal generation running as a back-up supply for when the wind or solar drops off,” Depraetere said.

“Germany consumed 100% renewable energy yesterday [Sunday], but we’re unlikely to see clean energy supply 100% of generation anytime soon,” he said. — © Bloomberg