Commonwealth Fusion Systems

Commercial fusion energy company building the SPARC demonstration device and fusion power plants

cfs.energy

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Commonwealth Fusion Systems (CFS) describes itself as the world's largest commercial fusion energy company. It is building SPARC, a fusion demonstration device it aims to turn on in 2027, as a step toward commercial fusion power plants, using superconducting magnets to confine plasma. In October 2026 CFS announced an $85 million U.S. CHIPS Act award from the Department of Commerce to develop silicon carbide power electronics, radio-frequency power generators, radiation-hardened control electronics and AI hardware adapted for fusion power plants.

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cfs.energy
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