How Does Space-Based Solar Power Work?
From orbital capture to grid integration — the five steps to powering Earth from space using proven physics and modular engineering.
Space-based solar power works by capturing sunlight 24/7 in orbit using modular solar arrays, converting it to electrical energy, transmitting it to Earth as radio frequency (RF) waves in the same spectrum used for WiFi and satellite TV, receiving it at ground stations called rectennas, and feeding the resulting electricity into the power grid. The RF transmission passes through clouds and rain with negligible loss, making it reliable in all weather conditions.
The space segment consists of lightweight, modular satellites designed for incremental deployment, enabling technology updates between phases and flexible capacity scaling. Ground receiving stations (rectennas) are similar in size to existing solar farms but deliver more energy per square metre and can operate continuously at peak output.
According to TerraSpark, every essential component for SBSP is now ready. Launch costs have collapsed, satellite production has scaled, RF efficiency has accelerated, control systems benefit from AI, and materials science has unlocked new possibilities. The company positions SBSP as the only solution that simultaneously provides clean, continuous energy generation and the ability to deliver power anywhere on Earth.