Fusion reactors: Overview
Machines trying to bottle a star here on Earth
What this tile covers Experimental machines that join light atoms, as the Sun does. Share of use 0% share of world energy supply (2024)Share of world total energy supply captured or extracted by each method, 2024 (latest year where noted). Denominator is the Energy Institute Statistical Review 2025 total of 592.2 EJ (physical energy content method); electricity from wind, solar, hydro and geothermal is counted at output, nuclear at reactor heat. Heat and biomass flows outside EI's total are set against the same 592.2 EJ. No fusion device has yet produced net electricity. Source: The global fusion industry in 2025, Fusion Industry Association.
Key facts
| Output | Heat (experimental) |
Included from the reference tables
- Tokamaks (ITER)
- Stellarators
- Laser inertial confinement (NIF)
Linked to the material world
Li LithiumBe BerylliumAlso in Emerging
MH Micro energy harvestingSBS Space-based solar powerExplore paths from here
More on this tile in the tabs above: efficiency, techniques, resources and labour, impact on the biosphere.