Space-based solar power (SBSP)—collecting sunlight in orbit and beaming it to Earth as microwaves—promises baseload energy without intermittency, weather, or night. In geostationary orbit, panels capture ~8x more energy than ground-based equivalents, enabling 24/7 transmission. As Peter Diamandis outlines in abundance frameworks, this could cascade into post-scarcity: unlimited clean power driving desalination, AI compute, and global prosperity.
2025 Momentum
Caltech’s SSPD-1 (launched 2023) successfully demonstrated wireless power beaming from space and flexible arrays. ESA’s Solaris program nears a 2025 decision on full development. JAXA aims for ground beaming demos in 2025; China plans kilometer-scale tests by 2028 and MW-scale by 2035. NASA’s studies and private efforts (e.g., Northrop Grumman) highlight falling launch costs enabling gigawatt-scale systems.
Path Forward
Plummeting reusables (Starship-era) drop costs to <$500/kg; modular, robotic assembly scales to swarms. Initial pilots (2030s) prove economics, evolving to Dyson-like precursors by mid-century—harvesting fractions of solar output for Kardashev-level abundance.
SBSP isn’t fringe—it’s converging exponentially. Will orbital arrays end energy scarcity, or remain grounded by politics? The sun shines always; humanity’s choice is whether to reach for it.