# Fusion reactors: Overview

Machines trying to bottle a star here on Earth

Source page: https://www.materialinsights.org/energy/e_fusion/overview/

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](https://energy.unimelb.edu.au/__data/assets/pdf_file/0010/5512726/2025-Global-Fusion-Industry-Report.pdf), 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 Lithium](https://www.materialinsights.org/commodities/lithium/)[Be Beryllium](https://www.materialinsights.org/commodities/beryllium/)

#### Also in Emerging
[MH Micro energy harvesting](https://www.materialinsights.org/energy/e_micro_harvest/)[SBS Space-based solar power](https://www.materialinsights.org/energy/e_space_solar/)

Explore paths from here
 More on this tile in the tabs above: efficiency, techniques, resources and labour, impact on the biosphere.

## Other sections

- [Summary](https://www.materialinsights.org/energy/e_fusion/index.md)
- [Correlation](https://www.materialinsights.org/energy/e_fusion/correlation/index.md)
- [Efficiency](https://www.materialinsights.org/energy/e_fusion/efficiency/index.md)
- [Techniques](https://www.materialinsights.org/energy/e_fusion/techniques/index.md)
- [Resources and labour](https://www.materialinsights.org/energy/e_fusion/resources/index.md)
- [Impact on the biosphere](https://www.materialinsights.org/energy/e_fusion/biosphere/index.md)
- [Relationships](https://www.materialinsights.org/energy/e_fusion/links/index.md)