Gregtech 5 Unofficial Power Sources

A tiered guide to the various power sources available, including IC2. Items are ordered by progression and not by capability; so generators that require higher-tier parts to make are ranked later.

On-Demand generators will only consume input resources if there is a demand for electricity on the network. This means these generators can be left "on" all the time. Generators without this property will need automation to avoid wasting resources.

Renewable generators require no input resource. Sounds great! They are a mid-game item, and require considerable resources to produce the generator.

Stone Age

Initially, a stone furnace is sufficient to smelt items. It works with hoppers, so some basic automation is possible.

The IC2 Iron Furnace is an upgrade of the stone furnace in every way; more fuel efficient and faster processing. Requires iron plates.

Steam Age

With bronze, GregTech boilers can be made. These produce steam that can be consumed by steam machines (and their high pressure versions), or by steam turbines to produce EU.

Charcoal, coal, and their dust versions produce 160 energy. Coal coke produces 640, and lignite produces 40. While lignite is much less efficient, it is much more abundant in ore generation.

Icon Name Can Automate? Charcoal/Minute Steam/sec Description
Small Coal Boiler No 1/6 120 mb Too many of these becomes too much to micromanage.
Simple Solar Boiler No 0 120 mb Efficiency is coded to drop after a few in-game days, and must be wrenched and replaced to reset efficiency. Requires Silver Plates.
High Pressure Coal Boiler No ??? 600 mb Efficiency drops as more ash is generated in the by-product slot. Clearing out the slot resets efficiency. Requires Steel.
High Pressure Lava Boiler No 300 mb Lava 600 mb Efficiency drops as more ash is generated in the by-product slot. Clearing out the slot resets efficiency. Requires Steel. Lava may be piped in. Not a great power source unless you have a lot of lava for some reason.

Low Voltage Age

Prerequisite: A stable source of Steel, Tin, Copper, Basic Circuits.

Icon Name Can Automate? Input Rate Output Rate Description
Large Bronze Boiler Yes 2 charcoal per sec 32000 mb per sec Input can be automated, and is compatible with the machine controller cover.
Basic Steam Turbine Yes 1600 mb/s Steam 32 EU/t 85% Efficient. On-Demand.

Medium Voltage Age

Prerequisite: A stable source of Aluminium, Good Electronic Circuits.

LV generators can be grouped to produce 32 EU/t * 4 Amp into a transformer to produce 128 EU/t * 1 Amp. At a certain point the steam input piping becomes too complicated and switching to MV (or higher) producers makes more sense.

Icon Name Can Automate? Input Rate Output Rate Description
Advanced Steam Turbine Yes 7040 mb/t Steam 128 EU/t 75% Efficient. On-Demand.

High Voltage Age

Prerequisite: A stable source of Stainless Steel, Gold, Silicon, Advanced Circuits.

It requires 16 LV generators to produce 1 amp of HV, which is getting ridiculous. Time to upgrade!

HV allows you to build the molecular transformer, which can make Sunnarium. This rare item is needed for renewable energy sources. Sunnarium requires 10 MILLION EU to produce one piece.

Icon Name Can Automate? Input Rate Output Rate Description
Large Steel Boiler Yes 1.5 charcoal per sec 36000 mb per sec Input can be automated, and is compatible with the machine controller cover.
Turbo Steam Turbine Yes 31515 mb/t Steam 512 EU/t 66% Efficient. On-Demand.
Large Steam Turbine Yes Multi-block. Input/Output depends on rotor size and material. Rotor and dynamo can be swapped later to upgrade "in-place". Requires IC2 Advanced Circuits.
LV Water Turbine Yes 8 EU/t Renewable. Requires water blocks on four sides to generate power.
MV Water Turbine Yes 64 EU/t Renewable. Requires water blocks on four sides to generate power.
HV Water Turbine Yes 512 EU/t Renewable. Requires water blocks on four sides to generate power.

Petroleum Age

With oil refining, you will start to have large quantities of combustable gasses and fluids. These are very effective power sources, as they are very dense. Some of these generators were craftable before petroleum, but without a stable source of fuel they aren't reliable.

Icon Name Can Automate? Input Rate Output Rate Description
Basic Gas Turbine Yes 32 EU/t 95% Efficient. Input rate depends on fuel (flammable gas). Makes a decent portable power source. On-Demand.
Advanced Gas Turbine Yes 128 EU/t 90% Efficient. Input rate depends on fuel (flammable gas). Makes a decent portable power source. On-Demand.
Turbo Gas Turbine Yes 512 EU/t 85% Efficient. Input rate depends on fuel (flammable gas). Makes a decent portable power source. On-Demand.
Basic Combustion Generator Yes 32 EU/t 95% Efficient. Input rate depends on fuel (flammable fluids). Makes a great portable power source. On-Demand.
Advanced Combustion Generator Yes 128 EU/t 90% Efficient. Input rate depends on fuel (flammable fluids). Makes a great portable power source. On-Demand.
Turbo Combustion Generator Yes 512 EU/t 85% Efficient. Input rate depends on fuel (flammable fluids). Makes a great portable power source. On-Demand.

Extreme Voltage Age

Prerequisite: A stable source of Titanium, Extreme Circuits

Icon Name Can Automate? Input Rate Output Rate Description
Large Titanium Boiler Yes 1.3 charcoal per sec 41600 mb per sec Input can be automated, and is compatible with the machine controller cover.
EV Water Turbine Yes 4096 EU/t Renewable. Requires water blocks on four sides to generate power.
Large Gas Turbine Yes Multi-block. Input/Output depends on rotor size and material. Rotor and dynamo can be swapped later to upgrade "in-place". Requires Extreme Circuits and Titanium.
IC2 Nuclear Reactor Yes Uses IC2 power output rules. Power output is highly dependent on reactor chambers and layout. Fuel is Uranium, Thorium, or MOX. Requires Elite Circuits. Very long running, automation doesn't work with mixed fuel cell sizes. Bad layouts can cause meltdowns.
Naquadah Reactor Mark I Yes 2048 EU/t 80% Efficient. On-demand. Requires Uranium 235. EV.
IC2 Nuclear Reactor (Fluid Mode) Yes Outputs hot coolant instead of EU. Power output is highly dependent on reactor chambers and layout. Fuel is Uranium, Thorium, or MOX. Requires Elite Circuits. Very long running, automation doesn't work with mixed fuel cell sizes. Bad layouts can cause meltdowns. Hot coolant can be pumped to a Large Heat Exchanger to produce Steam/Superheated Steam.

Insane Voltage Age

Prerequisite: A stable source of Tungstensteel, Elite Circuits

Icon Name Can Automate? Input Rate Output Rate Description
Large Tungstensteel Boiler Yes 1.2 charcoal per sec 48000 mb per sec Input can be automated, and is compatible with the machine controller cover.
Large HP Steam Turbine Yes Multi-block. Input/Output depends on rotor size and material. Rotor and dynamo can be swapped later to upgrade "in-place". Requires Elite Circuits and Titanium. Will convert HP Steam to regular Steam, which can then be piped into regular steam turbines.
Naquadah Reactor Mark II Yes 8192 EU/t 90% Efficient. On-demand. Requires Plutonium 241. IV.
Plasma Generator Mark I Yes 2048 EU/t 50% Efficient. On-demand. Requires Plutonium 241. Input rate is dependent on fuel.

Ludicrous Voltage Age

Prerequisite: A stable source of Chrome, Master Circuits

Icon Name Can Automate? Input Rate Output Rate Description

Zero Point Module Voltage Age

Prerequisite: A stable source of Iridium, Ultimate Circuits

Icon Name Can Automate? Input Rate Output Rate Description
Plasma Generator Mark II Yes 8192 EU/t 60% Efficient. On-demand. Requires Europium (Fusion product). Input rate is dependent on fuel. ZPM.

Ultimate Voltage Age

Prerequisite: A stable source of Osmium, Super Circuits

Icon Name Can Automate? Input Rate Output Rate Description
Naquadah Reactor Mark III Yes 32768 EU/t 100% Efficient! On-demand. Requires Enriched Naquadah. UV.
Large Plasma Generator Yes Multi-block. Input/Output depends on rotor size and material. Rotor and dynamo can be swapped later to upgrade "in-place". Plasma is generated by a FUSION REACTOR!
Plasma Generator Mark III Yes 32768 EU/t 70% Efficient. On-demand. Requires Americium (Fusion product). Input rate is dependent on fuel. UV.

To Sort

Icon Name Can Automate? Input Rate Output Rate Description