One such technology – wireless power transmission – was recently demonstrated in Germany to an audience of decision makers from business and government.For a working version of a Space-Based Solar Power system, solar power satellites in geostationary orbit would harvest sunlight on a permanent 24/7 basis then convert it into low-power density microwaves to safely beam down to receiver stations on Earth.The physics involved means that these satellites would have to be large, on the order of several kilometres in size, to generate the equivalent power of a typical nuclear power station.Further research to confirm benign effects of low-power microwaves on human and animal health and compatibility with aircraft and satellites would also be undertaken.ESA’s SOLARIS – being proposed to Europe’s space ministers at the Agency’s Council at Ministerial Level on 22-23 November – will research these technologies, to allow Agency Member States to make an informed choice on future implementation of Space-Based Solar Power as a new source of clean, always-on ‘baseload’ power supplementing existing renewable power sources, helping Europe to attain Net Zero by mid-century."