In July 2019, figures published by the Fraunhofer Institute for Solar Energy Systems (ISE) report that renewable energy is for the first time providing more electricity than coal and nuclear power combined in Germany. Solar, wind, biomass and hydroelectric power generates nearly half of the country's output. Times with negative prices increased as solar and wind power increased. Solar and wind power has low marginal cost, and other production sources with higher fuel costs become less competitive when demand and prices are low. During the COVID-19 pandemic in Germany, solar power in Germany occasionally produced 32 gigawatt (GW). Solar, together with wind and other renewables, accounted for 78% of German power at one point.