Source-checkedTechnology & automation

Helios Fusion Reactors

by kalipser · for Space Engineers

Helios Fusion Reactors A star in a box. Helios reactors are compact tokamak fusion reactors that burn Ice . They come in three tiers for large and small grids, with their own high-tech parts.…

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About Helios Fusion Reactors

From Steam Workshop

Helios Fusion Reactors A star in a box. Helios reactors are compact tokamak fusion reactors that burn Ice . They come in three tiers for large and small grids, with their own high-tech parts.…

Helios Fusion Reactors

A star in a box. Helios reactors are compact tokamak fusion reactors that burn Ice. They come in three tiers for large and small grids, with their own high-tech parts.

Reactors

[table] [tr][th]Block[/th][th]Grid[/th][th]Size[/th][th]Power[/th][th]Ice at full load[/th][/tr] [tr][td]Helios Reactor 300 MW[/td][td]Small[/td][td]3x3x3[/td][td]300 MW[/td][td]~300 kg/h[/td][/tr] [tr][td]Helios Reactor 750 MW[/td][td]Small[/td][td]5x5x5[/td][td]750 MW[/td][td]~750 kg/h[/td][/tr] [tr][td]Helios Reactor 1 GW[/td][td]Small[/td][td]7x7x7[/td][td]1 GW[/td][td]~1,000 kg/h[/td][/tr] [tr][td]Helios Reactor 1 GW[/td][td]Large[/td][td]1x1x1[/td][td]1 GW[/td][td]~1,000 kg/h[/td][/tr] [tr][td]Helios Reactor 2.5 GW[/td][td]Large[/td][td]3x3x3[/td][td]2.5 GW[/td][td]~2,500 kg/h[/td][/tr] [tr][td]Helios Reactor 5 GW[/td][td]Large[/td][td]5x5x5[/td][td]5 GW[/td][td]~5,000 kg/h[/td][/tr] [/table] 1 kg of ice gives 1 MWh, the same energy per kg as vanilla uranium. A reactor only burns what the grid draws.

New parts (Assembler)

  • Magnetic Confinement Coil: iron, cobalt, gold, platinum
  • Plasma Injector: iron, nickel, silicon, silver
  • Fusion Core: iron, gold, platinum, uranium, magnesium

Reactors also need steel, superconductors, motors and computers. The bigger the tier, the bigger the bill. A reactor only switches on once its fusion parts are welded in.

Features

  • Custom animated model: plasma streams round a glass ring threaded through 12 magnet coils, energy climbs the central solenoid and the coils fire in turn, faster as power output rises, with core flares under heavy load
  • Bigger with every tier: 1x1x1, 3x3x3 and 5x5x5 on large grid, 3x3x3, 5x5x5 and 7x7x7 on small grid, with construction stages for each
  • Own toolbar icon for every tier
  • Tier glow colours: cyan (300 MW / 1 GW), violet (750 MW / 2.5 GW), orange (1 GW small / 5 GW)
  • Paintable hull, plus vanilla status lights (on / off / damaged)
  • Vanilla conveyor ports centred on the top, bottom, front and back (the 1x1x1 has bottom and back only). Feed ice by conveyor, or press F on a port to put ice in by hand
  • Vanilla terminal panels on the ports

Good to know

  • Contains mod scripts (visuals only). They run on clients and never on a dedicated server
  • Works in single player, multiplayer and on dedicated servers
  • Safe to add to existing worlds. Removing it removes the reactors and parts
  • Updating from an older version: most reactors changed size (only the large 2.5 GW and small 300 MW stay 3x3x3). Placed reactors take their new size when the world loads, so check for overlaps with neighbouring blocks
  • Pairs well with Photon Bio-Farms (oxygen + hydrogen solar farms)

Highlights

From source data

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 2d ago.

Helios Fusion Reactors on Nxeon

From our catalogue
One-click install
Not available. One-click install isn't available for this game's mods yet. Download it and upload it to your server in Files.
Server load
light
Smallest plan we suggest
Space Engineers — 8 GB (8 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
2026-11-02, released 2026-11-02

Game versions by loader

LoaderGame versionsNewest
Workshop

From 2 recorded builds of Helios Fusion Reactors.

Recent builds

BuildReleasedGame versionsLoaders
2026-11-022026-11-02n/aWorkshop
2026-10-312026-10-31n/aWorkshop

Run Helios Fusion Reactors on a Space Engineers server

Deploy a server above, then upload the file in Files.

What kind of mod it is

From the catalog
Listed on Steam Workshop as “Workshop”

Technology & automation

Machines, power, logistics and automation.

Compatibility

Game
Space Engineers

Verified at the source

  • ✓Steam WorkshopOfficial listing, checked 2026-11-03Open ↗
  • ✓Authorkalipser, as published on Steam Workshop
  • ✓LicenseNot published by the sourceFree

Helios Fusion Reactors, answered

Generated from the mod’s own source data.

Is it free?

Yes. Helios Fusion Reactors is free to download from Steam Workshop.

How do I add it to my Nxeon server?

One-click install isn't available for this game's mods yet. Download Helios Fusion Reactors from Steam Workshop and upload it to your Nxeon Space Engineers server in Files.

NxLabs

Run Helios Fusion Reactors on a Space Engineers server.

Deploy in about a minute from $13.99 a month, then upload Helios Fusion Reactors in Files.