Helion Energy
David Kirtley
Overview
Helion Energy is building fusion generators aimed at producing commercial electricity from fusion. Its Polaris prototype began operating in late 2024 and in February 2026 became the first privately developed fusion machine to demonstrate measurable deuterium-tritium fusion at 150 million degrees Celsius. Helion is now advancing Orion in Malaga, Washington, where site work began in 2025 for the company's first commercial machine intended to deliver electricity from fusion to Microsoft.
Main Products
7th-generation fusion prototype designed to demonstrate electricity production from fusion using Helion's pulsed magneto-inertial architecture and direct electricity recapture.
Operating in Everett, WA, since late 2024. Achieved 150 million degrees C and first private D-T fusion in February 2026; Helion is now pushing toward higher repetition rates and electricity production.
First commercial fusion power plant, designed to generate 50+ MWe. Located in Malaga, Chelan County, Washington, on land leased from Chelan County PUD near Rock Island Dam. Power will be marketed by Constellation Energy to Microsoft data centers.
Site work began in July 2025, and by October 2025 Helion had cleared the approval pathway for all major structures including the fusion generator building. Helion remains focused on delivering power for Microsoft by 2028 with ramp-up thereafter.
What's Next
Operations & Revenue
Development stage — Orion site work is underway, but Helion has not yet delivered commercial electricity. First revenue still depends on Orion supplying Microsoft, which Helion says remains on track for by the end of 2028.
Pipeline & Contracts
Microsoft Power Purchase Agreement
World's first fusion PPA — 50+ MWe of electricity to be delivered via Constellation Energy to Microsoft data centers by 2028.
Customer agreement to develop a 500 MWe fusion power plant at a Nucor steel manufacturing facility in the United States; the deal also included Nucor's investment in Helion.