Commonwealth Fusion Systems (CFS) has published 226 peer-reviewed pages demonstrating that its ARC fusion power plant design can deliver 400 megawatts of electricity to the grid. The proof-of-physics marks a major milestone for the startup, which aims to commercialize fusion energy.
However, significant engineering and economic hurdles remain. Physicists have raised questions about the practicality of building and operating such a plant at scale, including the reliability of high-temperature superconducting magnets and the overall cost. CFS plans to have a working prototype by 2026, but skeptics say the path from physics validation to a real-world power plant is long and uncertain.