HH170 is Energy Singularity's planned high-field HTS tokamak intended to reach an energy gain Q above 10 to show the commercial feasibility of fusion, to be followed by an HH380 power demonstrator. A first HH170 central-solenoid prototype passed 20 K current testing in June 2025.
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Current state
| Status | Design |
| Country | China |
| Location | Shanghai |
| Developer | Energy Singularity |
| Developer type | Private |
| Concept | Tokamak |
| Fuel | D-T |
| Purpose | Demonstration |
Notes
Q>10 is Q_sci. Secondary sources cite a 2027 completion goal for HH170; not confirmed by company sources reviewed, so no target year set. Company reportedly seeking ~$500m for HH170 (FusionXInvest, unverified).
Timeline
- 2024-06 — Energy Singularity said HH170 engineering design would begin in early 2025, after HH70 first plasma. (source)
- 2025-06-12 — The first HH170 central-solenoid prototype passed 20 K current-carrying tests. (source)
- 2026-06-17 — Energy Singularity reported a 26.7 T cryogen-free HTS magnet, part of its high-field magnet programme for HH170. (source)
The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.
Related projects
- ARC (Commonwealth Fusion Systems) Design · United States
- BEST (Burning Plasma Experimental Superconducting Tokamak) Under construction · China
- CFEDR / China Fusion Energy Co. demo reactor (successor to CFETR) Design · China
- CTRFR-1 / Startorus No.1 (Startorus Fusion) Design · China
- EAST (Experimental Advanced Superconducting Tokamak) Operating · China
- EU DEMO (EUROfusion Demonstration Power Plant) Concept · European Union
- FAST (Fusion by Advanced Superconducting Tokamak) Design · Japan
- HH70 (Energy Singularity) Operating · China
See all 51 projects in the Fusion Energy Companies & Projects Tracker →
Sources
- News — Energy Singularity (primary), checked 2026-10-11
- China may welcome the 'first kilowatt-hour' of controlled nuclear fusion — Energy Singularity (primary), checked 2026-10-11
- China's commercial 'artificial sun' achieves first discharge — Global Times, checked 2026-10-11
- Energy Singularity achieves first plasma — FusionXInvest, checked 2026-10-11