From GT New Horizons

Welcome to Low Voltage, the first of many power tiers in GregTech: New Horizons! With access to electricity comes new hazards and mechanics, but also far more variety of specialized machines that can process materials into new parts with greater efficiency.


Some of the primary milestones for this tier are as follows.

  • Batch craft Electronic Circuits
  • LV components - Motor, Piston, Pump, Robot Arm, Sensor, Emitter
  • LV Machines - Bending Machine (priority), Wiremill (priority), Lathe, Assembler, Electrolyzer, Chemical Reactor, Fluid Extractor, etc.
  • Acquire Lithium and Lead for Batteries
  • Pump Oil for Polyethylene and Light Fuel
  • Upgrade Power Generation
  • Build Good Circuits
  • Locate Mica (or make the more expensive Alumino Silicate Wool)
  • Construct an Electric Blast Furnace & maintenance tools to get Aluminum

Optional Side Quests

  • Increase Hearts by eating a variety of foods
  • Plan for a larger base to accommodate MV machines / multiblocks
  • Make multiple Backpacks (Forestry/ModdedNetwork)
  • Hang Glider, Piston Boots, Healing Axe (if not already acquired)
  • Visit the Twilight Forest
  • More storage with drawer/barrel upgrades, Diamond Chests
  • Sound Mufflers, Chandeliers
  • Tool & Armor Upgrades
  • Item Dislocator (or another Magnet)

EU (Energy Units) Mechanics

Gregtech energy consists of Voltage and Amperage. A Low Voltage (LV) GT generator will output 32 volts (32V) in 1 amperage (1A/1 amp). Four generators on the same cable will output 32 volts in 4 amps combined. 32 volts in 4 amps is not the same thing as MV (Medium Voltage - 128 volts per amp). This can be compared to four cables containing 32 volts each, or one 4x Cable. The x rating of a cable (x1, x2, x4, etc.) denotes its maximum amperage. The general rule of thumb is your cables should have an equal Amp capacity to the number of generators/batteries attached. Battery Buffers output 1A per battery, while virtually every generator puts out 1A. Having a cable with enough Amperage capacity for all of them at once prevents fires and explosions.

For more advanced and complete information, see Electricity.

Energy Loss

The tooltip for GT cables show their max voltage, max Amperage and Loss per Meter/Ampere. A cable or wire will catch fire if it receives more than its max voltage or max amperage. A normal 1x Tin Cable will lose 1 volt for each block (meter) length of the cable. Uncoated wires lose even more per block and present a shock hazard, so never use bare wire to connect machines. If the distance between the power input and machine is 10 blocks long, and the generator is generating 32 volts in 1 amp, then there will only be 22 volts in 1 amp remaining on the other end of the cable. With a LV battery buffer with 4 LV batteries inside, it would send 32 volts in up to 4 amps, but after 10 blocks there will only be 22 volts each amp remaining. Lossless cables are gated behind Redstone Alloy and the Electric Blast Furnace, so until available players are well advised to keep cables as short as possible.

Battery Buffers

Battery Buffers are used to store EU Energy, at a 5% loss cost. Battery Buffers can be made in variable capacities between 1x and 16x internal slots. The Buffer itself does not store power; batteries matching the tier have to be inserted into the Battery Buffer to make it function. Each battery added will increase the buffer's capacity by +2 amps input and +1 amp output. Since buffers can have a variable amperage output based on the number of inserted batteries, care must be taken to ensure the cable has sufficient capacity to handle the buffer's maximum output. This becomes more relevant when multiple machines are all requesting amps at the same time over a longer cable.

GT Electric Machines

Machine GUI. Auto-output buttons circled in yellow.

LV Electric machines have some new features that were not available with Steam-age machinery. The Steam exhaust is replaced with an automatic output. This output's facing can be changed with a wrench similar to how the exhaust was configured on Steam machines. Just like their Steam counterparts, all electric GT machines cannot be input or output from their front face. To enable automatic output, open the GUI of the machine and click on the button at the lower left corner. There are two automatic output toggle buttons; the left one is for liquid and the right one is for items.

Electrolyzer clay dust recipe. The MV power requirement is circled in yellow.

Gregtech machinery is divided by tier, which corresponds to a specific voltage - LV (32v), MV (128v), HV (512v) etc. Most recipes are gated to a specific voltage/tier or higher, which is shown with the recipe in NEI (Not Enough Items). If the recipe requires more than one amp it will also be listed here. Pay careful attention to what tier a recipe requires - with LV machinery, MV and higher recipes are inaccessible.

For example, putting Clay Dust through the Electrolyzer to get Aluminium dust requires 120 EU/t (MV). Since the Basic Electrolyzer is only able to do 32EU/t, this recipe is unavailable until the Advanced Electrolyzer (MV).

Recipes close to the voltage limit for LV (32 EU/t) may cause the machine to request multiple amps, especially if there is any cable loss. A single LV generator will often not be capable of supplying enough power if the machine is placed too far away. Most GT machines will accept up to 2 amps. A second generator or Battery Buffer may be needed to keep a a high cost recipe running. If a machine runs out of power, it will stall resetting any progress but not losing the materials. A soft mallet can be used to temporarily disable a machine to give a buffer time to recharge or wait until more power generation is available.

Some machines require multiple amps to run at all, such as the Arc Furnace and Electric Blast Furnace. The Arc Furnace requires 3 amps to function and can accept up to 7 amps. Checking any recipe for the Arc Furnace will show Usage XX/t, voltage 32 EU/t and amperage 3. The Electric Blast Furnace is even more demanding, taking four amps of LV minimum for its most basic recipes.


Machines, wires and cables can overload, resulting in fires and explosions. Rain will make your electric machines explode if the rain is on any adjacent blocks to the machine, so put your machinery under a proper roof. Uninsulated wires will also catch on fire from rain. Fire adjacent to machines will cause them to explode, potentially taking out more machines and causing significant Pollution. Water does not cause fires/explosions; it's perfectly safe to have water blocks adjacent to machines.

Giving machines a higher voltage than they are rated for will make them explode. This won't become an issue before unlocking MV, but it's important enough to mention early and often. Excess Amperage on a cable is not an issue, as long as it doesn't exceed the cable's rating. Machines will only accept as many Amps as they need.

Energy Conversion


To transform IC2 energy into GT energy you simply need to place a GT transformer or power storage next to the IC2 power source. Keep in mind that IC2 generation is typically only 1 amp, therefore the Transformer should be in Step-Down mode. GT cables/wires can be used to connect IC2 machines, but pay attention to the EU output. Some devices such as the Stirling Generator output more than 32EU, and thus require at least x2 cable.

GT EU to Others

GT Cables can be attached to almost any machine that requires some kind of energy, allowing a single power network to run machines from most mods in the pack including IC2, EnderIO, Forestry, Railcraft, Galacticraft and more. Due to the idiosyncrasies of ENet, at least one GT machine (a machine hull will do the job nicely) has to be present for power to transfer on GT cables/wires. Placing the cable last sometimes also helps the setup register as valid.

Avoid Chunk border problems

Note: This is not fixed in version

Any server that runs some variant of bukkit has a "feature" that slows the tickrate of objects in chunks that are not force loaded and do not have a player in them. (So like all the chunks around you right now). Which causes cables to think they have more amps than normal going through them. These extra amps will often cause the cables to burn, which can lead to machines exploding. There are a couple ways to solve this, but one way is to make two transformers, one that steps up the voltage, and then another that steps it back down. This way you can have 4A max going over that border through those transformers. The transformers should be placed on either side of the chunk border. So something like: cable -> transformer Step-Up -> chunk border -> transformer Step-Down -> cable. If you want, you can make battery buffers or machine hulls instead of transformers.

How Do I Get

Resource Acquisiton
Arsenic XP Buckets (9x Tiny Piles = one dust), Centrifuge Small Realgar Ore (Nether), Cobaltite Dust -> EBF -> Roasted Arsenic Dust
Gallium XP Buckets (9x Tiny Piles = one dust), 10% byproduct of Zinc & Sphalerite ores, Electrolyze Sphalerite Dust