detailed information: Fraunhofer Institute for Solar Energy Systems ISE: https://energy-charts.info/index.html?l=en&c=DE https://energy-charts.info/index.html

detailed information: Fraunhofer Institute for Solar Energy Systems ISE: https://energy-charts.info/index.html?l=en&c=DE https://energy-charts.info/index.html?l=en&c=DE and European Energy Exchange AG: https://www.eex.com/en/ https://www.eex.com/en/