The Case For and Against
Is space-based solar power a serious future energy source or a perennial dream?
Chapter summary
both views have evidence.
Key takeaways
- 1
The case for: sunlight in orbit is nearly continuous; beaming physics works; demonstrations are advancing; launch costs are falling fast; serious buyers (Meta, the US Air Force) are engaging; and China is committing state resources.
- 2
The case against: costs are an order of magnitude too high on current trajectories; hardware must become a hundred times cheaper; assembly at scale is unproven; ground solar, storage and nuclear keep improving; and every revival since 1968 has faded.
- 3
Setcoin's view: SBSP will find paying niches in the 2030s and may reach grids in the 2040s if launch and manufacturing both deliver; it is not a near-term solution to grid decarbonisation.
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