Fusion startups keep promising power plants, the physics still says otherwise

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The takeaway: Fusion startups are attracting record amounts of money, building new test sites, and setting ambitious delivery dates. The harder task is proving that a fusion reactor can produce reliable electricity at a cost utilities will accept. For now, the technology still faces major hurdles before those commercial targets can be met.

Pacific Fusion recently broke ground on a test facility in Albuquerque, New Mexico. Helion Energy says it plans to provide electricity to Microsoft by 2028. Other companies are aiming to build commercial plants in the 2030s.

The money behind those effortsis growing. Fusion startups raised $3.8 billion in the first eight months of the year, according to PitchBook, more than the $3.3 billion invested during all of last year. The Fusion Industry Association says the number of private fusion...

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