Microwaves From Space — What Could Possibly Go Wrong?

Space-based solar power, a concept long confined to science fiction, is gaining serious traction as a potential solution to the intermittency of terrestrial solar energy. By placing solar collectors in orbit, where sunlight is nearly constant, energy could be harvested continuously and transmitted back to Earth via microwave beams. This approach promises to overcome the limitations of ground-based solar power, which is affected by weather, seasons, and the day-night cycle, potentially providing a steady, clean energy source around the clock. China is at the forefront of developing this technology, with the Zhuri initiative and its modular OMEGA design representing significant advancements. Unlike earlier proposals that relied on single, massive structures, the modular system consists of multiple smaller units working in concert, enhancing reliability and reducing engineering challenges. This distributed approach also mitigates risks from potential damage or sabotage, a critical consideration given the geopolitical sensitivities surrounding energy infrastructure. However, the dual-use nature of space-based solar power raises concerns beyond energy supply. Duan Baoyan, a leading figure in China’s programme, has highlighted the military applications of the technology, including communication, navigation, reconnaissance, and electronic warfare capabilities. The ability to direct narrow, precisely controlled microwave beams could enable targeted jamming of military communications or other forms of electronic interference, blurring the line between civilian energy infrastructure and strategic weaponry. This development underscores the broader implications of space-based solar power, which is not only a technological challenge but also a geopolitical one. While countries like China and the United States explore these systems for clean energy, the potential for militarisation adds a layer of complexity to international relations and space governance. As research progresses, balancing the promise of continuous renewable energy with the risks of weaponisation will be a key issue for policymakers and the global community alike.