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Comparison
Fusion vs Solar
Solar is the cheapest energy ever built — but intermittent and land-hungry. Fusion is firm and compact. The clean grid needs both, in different roles.
- Solar
- Cheapest energy; intermittent; land-hungry
- Fusion
- Firm, compact, always-on
- Capacity factor
- Solar ~25%; fusion high
- Relationship
- Complementary
Solar is a triumph — the cheapest electricity humanity has ever produced — and every clean-energy plan should lean on it heavily. But sunlight is intermittent and diffuse: solar delivers power when the sun shines, at a capacity factor around 25%, and needs large land areas. Fusion's value is precisely where solar is weak.
| Dimension | Fusion / Solar |
|---|---|
| Availability | Firm, 24/7 / daytime, weather-dependent |
| Capacity factor | High / ~25% |
| Land | Compact / large arrays |
| Cost per MWh | Higher, but firm / very low, but intermittent |
This isn't a competition — it's a partnership. The cheapest reliable clean grid pairs abundant solar with firm clean power for the nights, cloudy stretches, and winters solar can't cover. Fusion is designed for that firm role. See why not just build more solar and batteries?