Fusion Q&A
When will fusion energy be commercial?
Short answer
Commercial fusion electricity is expected between 2028 (Helion's PPA with Microsoft) and the late 2030s for utility-scale tokamak plants. Most expert surveys place broad deployment in the 2040s.
The three commercial milestones
Fusion commercialisation will happen in three steps: first commercial PPA (Helion 2028, targeted); first utility-scale plant supplying baseload (likely a tokamak, ~2032–2035); first wave of replicated plants (mid-to-late 2030s).
Every credible timeline depends on demonstrating sustained Q > 2 at reactor scale — which SPARC, EAST, and ITER are racing to do.
Frequently asked
- What is the earliest fusion electricity?
- Helion Energy's Polaris-7 targets 50 MW commercial electricity to Microsoft in 2028.
- When does ITER produce commercial electricity?
- ITER will never produce commercial electricity — it is a research device. The follow-on DEMO reactors are targeting 2040s commercial demonstration.
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