The question
Fusion or solar for abundant energy?
Fusion could supply large-scale power
David Friedberg
The fusion case points to China’s reported installation of a 582-ton superconducting magnet and an earlier sustained-plasma trial. The speaker interpreted these developments as progress toward systems that could eventually capture energy from extremely hot plasma, making fusion a possible future source for energy-intensive computing and industry.
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Component installation and sustained plasma do not establish commercial electricity output, cost competitiveness or a deployment date.
But just this week, if you pull up this image, China is installing this 582-ton magnet, superconducting magnet at their nuclear fusion center, which at this point is going to be the most advanced fusion system in the world. Incredible. 582-ton magnet, 60 foot by 40 foot for one D-shaped magnet. They put a series of these together and that creates the conditions for them to drive a sustained plasma, which is 100 million degrees celsius, protons spinning around, smashing into each other, creating energy from water, and then they can capture that energy. Unlike Europe, which runs ETER, and the US projects, none of which have actually fired up. This is the Chinese Academy of Science and the Institute of Plasma Physics. They ran this a 30-minute trial last year, and as this magnet gets installed and they start to bring this thing onlineChip Stocks Crash, $20B Fund Margin Called, Frontier Labs: SLOW DOWN AI, Mamdani's Grocery Stores ↗
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Solar is already the larger resource
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Elon Musk
The solar case emphasizes the amount of sunlight reaching Earth and the efficiency of commercially available panels. Paired with batteries, dense solar installations were presented as far more consequential than terrestrial reactors. From this perspective, fusion remains an interesting scientific project while solar already offers a practical resource to deploy.
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The comparison does not resolve storage, transmission, land-use or system-reliability requirements.
If people want to have fun with reactors, that's fine, have fun with reactors. But it's not a serious endeavor compared to the Sun. It's a fun science project to make a nuclear reactor, but it's just peanuts compared to the Sun. Even the solar energy that does reach Earth is a gigawatt per square kilometer or roughly called two and a half gigawatts per square mile. That's a lot and the commercially available panels are around 25, almost 26 percent efficiency. Then you say, if you pack it densely, you get an 80 percent packing density, which I think in a lot of places, you could get an 80 percent packing density. You effectively have about 200 megawatts per square kilometer. You need to pair that with batteries so you have continuous power. Although our power usage drops considerably at night, so you need less batteries than you think.Elon Musk: OpenAI Betrayal, His Future at Tesla, and the Next Big Thing - Grokipedia ↗
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Commercial output, total system cost, construction time and storage requirements rather than isolated laboratory milestones.