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Question
When will fusion energy be commercially available?
For Kronos: a prototype targeted for 2030, and a commercial fleet in 2036 and beyond.
The plan
Kronos publishes a dated, gated plan: open the physics in 2026, build a prototype targeted for 2030, and field a commercial burner fleet 2036 and beyond. The integrated machines are not yet built.
2026
Open physics
Peer-review papers, open data, a live simulation — the design point solved and reproducible.
2030
Prototype
Breeder physics on hardware; confinement and blanket gates retired step by step.
2036+
Fleet
The commercial generators — Aegis and MetroVolt — at scale.
Related questions
More answers.
When will fusion energy be commercially available? +
Timelines vary by company. Kronos targets a prototype in 2030 and a commercial fleet in 2036 and beyond, with the physics published openly in 2026.
Has Kronos built a fusion reactor yet? +
Not yet. Kronos is a conceptual design and simulation study; the integrated machines are not yet built. Every specification is a computed design target, published openly so anyone can check it.
What has to happen before the fleet? +
Chiefly, demonstrating the burner's requirement-class closure — an end-plug density that is specified but not yet demonstrated — plus advancing the breeding blanket. Kronos publishes these open gates.
Verify it yourself
Open by design.
Conceptual design and simulation study; the integrated Kronos machines are not yet built, and certain results are requirement-class. No financial figures are published on this site.