A team of Chinese scientists led by Fan Guanheng has demonstrated wireless power transmission over 100 meters using mirrors, solar panels, and a microwave transmitter. The researchers at Xidian University in Xi'an are now aiming much higher—36,000 kilometers into geostationary orbit.
This ambitious project envisions a space-based solar plant that could generate power continuously, unaffected by weather or nightfall. If realized, it might transform global energy supply by providing a constant source of clean electricity beamed down to receiving stations on Earth.
On a sweltering June morning, the team tested how effectively light could be concentrated by their ground-based prototype. These experiments are critical steps toward proving the technical feasibility of collecting solar energy in space and transmitting it wirelessly over vast distances.
The implications are enormous: such a system could help decarbonize power grids and reduce reliance on fossil fuels. But engineering challenges remain immense, including building lightweight solar arrays, managing heat dissipation, and ensuring safe microwave beam targeting.
Critics point to the staggering costs and technological hurdles. Even optimistic timelines put a fully operational space solar plant decades away, raising questions about whether terrestrial renewables might offer a more practical near-term solution.