About Better Fusion Reactor for Mekanism
From ModrinthMore challenging and realistic fusion reaction
Better Fusion Reactor is an addon for Mekanism Generators
Supported versions: 1.12.2, 1.16.5, 1.18.2, 1.19.2
The idea behind this addon is to bring Fusion Reactor from Mekanism a bit more realistic and more challenging to manage.
In real life fusion reaction is very difficult thing and humanity is not yet achieved stable long-term reaction.
By installing this addon you will have to control certain parameters of Fusion Reactor with redstone, computers or manually.
And as higher temperatures as harder to maintain stable reaction.
This addon adds new UI for reactor controller and reactor logic port.
You will have to re-build current reactors if you have any with blocks from this mod.
What is all about?
Your task is to keep Current Reactivity (CT) as close as possible to Target Reactivity (TR) And by that you will get better Reaction Efficiency. That means more energy output, or steam per tick, or heat.
If Efficiency less than 80%, the Error Level will grow up. And if Error Level reaches 100%, Reactor will shutdown. It also can go BOOM 💥 if that is enabled in config. (disabled by default)
If Efficiency greater than 80%, the Error Level will slowly fall down.
Keep in mind Target Reactivity is a random value between 0 and 100, and it changes periodically.
So you can't just ignite your reactor and walk away. You has to spend some time to controll it manually, or implement sort of automation logic on redstone or computers.
Pay attention to Heat Multiplier (Hm). Less value means bigger time span between Target Reactivity reset.
And it also affects how fast Error Level changes. So for the manual control, try to keep it closer to 0.
Heat Multiplier depends on plasma temperature. Play with injection rate and you will find the best value.
It also depends on cooling type. Water cooling - less Heat Multiplier.
But if you want to get more energy, you have to automate reactor controlling. Good Luck.
Example LUA script for OpenComputers https://github.com/igentuman/BettefFusionReactor/wiki/Simple-OpenComputers---ComputerCraft-script-for-reactor
Credits:
pupnewfster, aidancbrady, thommy101, thiakil and dizzyd for original mod
Highlights
From source dataGame versions
Supports 6 Minecraft versions, the newest being 1.21.1.
Loaders
Runs on Forge and NeoForge.
Footprint
Rated a light load on a server.
Better Fusion Reactor for Mekanism on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Forge, NeoForge
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.5.9rc1, released 2026-02-22
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| NeoForge | 1.20.1 to 1.21.1 (2 versions) | 1.21.1 |
| Forge | 1.20.1 | 1.20.1 |
From 5 recorded builds of Better Fusion Reactor for Mekanism.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.5.9rc1 | 2026-02-22 | 1.21.1 | NeoForge |
| 1.4.15 | 2026-02-22 | 1.20.1 | Forge, NeoForge |
| 1.5.9b1 beta | 2025-09-07 | 1.21.1 | NeoForge |
| 1.4.14 | 2025-09-07 | 1.20.1 | Forge, NeoForge |
| 1.4.13 | 2025-08-11 | 1.20.1 | Forge, NeoForge |
Run Better Fusion Reactor for Mekanism on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogTechnology & automation
Machines, power, logistics and automation.
Runs on your server
From source side supportModrinth lists Better Fusion Reactor for Mekanism as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- ForgeNeoForge
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.1 and 5 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓Authorigentuman, as published on Modrinth
- ✓LicenseMITFree












