Storing Green Energy to Last Germany 10 Days Would Require A 60-Million Tonne Battery

An article at the European Institute for Climate & Energy (EIKE) website here takes a critical look at whether battery parks would be feasible to fully secure Germany’s weather-dependent power generation from wind and solar. . . . 10 days of buffer To bridge a ten-day “Dunkelflaute” (dark doldrums) in winter with a 50 GW load, 12,000 GWh would be needed. This is 470 times the current total capacity and 2,800 times the current large-scale storage. Such a battery would weigh 60 million tons. A modern factory (like CATL in Thuringia) would theoretically need 857 years to produce this amount.