Electric system

The Electric system is used to power a lot of different machines; the game can hardly be played without using electricity. Every machine has its own internal electric capacity. When energy is produced, it is evenly distributed to all machines in the network that need electricity.

Creating a new network

Generators

There are four ways to produce electricity.

1. Steam engines - Most common, requires Boilers (which consume Water and fuel).
2. Solar panels - Free energy, but only works during daylight. Usually used with Accumulators.
3. Accumulators - Energy storage, see below
4. Steam turbines - High-power Steam engines. Used to generate power from a Nuclear reactor.

If a network consumes less power than is produced, its Steam Engines and Turbines will slow down so that no power is wasted.

Storage

Electricity can be stored in Accumulators. Accumulators charge using excess power generated, and discharge when demand exceeds normal production.

Additionally, Steam can be stored in Storage tanks, allowing Steam Engines or Steam Turbines to operate on-demand. This technique is commonly used in Nuclear Reactor designs, in which the Reactors themselves produce more power than necessary and only run intermittently.

Distribution

Power poles are used to transmit energy. There are 4 types of power pole, each having advantages and disadvantages:

1. Small electric pole - Second smallest coverage area, shortest cable length, available without research.
2. Medium electric pole - Second largest coverage area, average cable length.
3. Big electric pole - Smallest coverage area, longest cable length.
4. Substation - Largest coverage area, second longest cable length.

Consumption

The majority of machines in Factorio consume electricity. There are two aspects to a machine's energy use.

• Energy consumption - The energy consumed by the machine while it is actively carrying out a process (crafting an item, moving an item, etc). If an electric network does not have enough power generation to supply all the machines in it, the electricity will be evenly spread across all machines in the network (based on each machine's demand), and all machines will slow down proportionally to the power available.
  • For example: If an Assembling machine 3 (210kW) and an Electric mining drill (90kW) are on a network (90+210 = 300kW), but the network only has 3 Solar Panels (3x60kW = 180kW) to power them, the Assembling machine and Mining drill will both run at 60% speed (180/300=0.6).
• Drain - The energy consumed by the machine whether it is active or not. Most machines consume a small amount of power just being connected to a network. This is usually negligible, but can become notable in small factories where power is limited.

Connection

Simple example of a small electric network.

A network is created by placing electrical generators (Steam engines or Solar Panels) and electrical consumers, then ensuring a connection between the generator and consumer can be made using Distributors (such as Small electric poles) that are connected together. Electric poles cover differently sized areas depending on their type. The area of coverage appears as a blue overlay around the pole. If two poles are placed close enough, the poles connect automatically. A building is connected if one tile of the building is in a covered area. Hovering the cursor over a pole reports the current satisfaction of power demands in that pole's network, and clicking on a pole will provide a detailed GUI about that pole's electric network. (See below)

• Use shift-click on a existing pole to remove all its connections to other poles.
• Unconnected poles can be connected with a single Copper cable dragging from pole to pole (Left click on the bottom of the pole with the cable in hand.)
• Individual connections can be removed by "connecting" them with copper cable. This will not consume the cable.
• You can use place-key (default left mouse) while running/driving to auto-place poles at their greatest connectible distance. This allows for complete efficiency when connecting long distances. If connecting over long distances, using Big electric poles is recommended.

Electric network screen

The Electric Network Info GUI

The Electric network info GUI can be accessed by left-clicking any electric pole nearby.

You can see only the info from the electric network to which that pole is connected! Unlike the production-info (press P) the electric network info is not measured globally, but by network.

1. Consumption - What are the current consumption demands. This bar should ideally be full. If it is not, it means your buildings demand more energy than is produced by your generators. Add more generators.
2. Production - What is the current production amount. This bar should ideally never be full. If it is full, it means your buildings are consuming all the energy you can produce, and you have no spare energy production capacity. The less full this bar is, the more energy the factory has as surplus.
3. Accumulator capacity - How much energy is currently held inside of the accumulators connected to your network. Measured in joules. 1Joule = 1Watt * 1sec, see also wikipedia:Joule This bar should be able to fill fully before emptying again.
4. Timespan - Set the time span for the graphs below. "5s" means over the last 5 seconds.
5. Detailed Consumption - A list of consumers from highest power consumption to lowest. In the picture example, you can see that 2 oil refineries take the most power, at 431 kW.
6. Detailed Production - A list of producers from highest power production to lowest. In the picture example, you can see that only 9 Steam engines produce all the electricity in the factory.
7. Consumption Graph - Shows the consumption of the different parts of your factory over time. You can choose the timespan as detailed in #4 above.
8. Production Graph - Shows the production of the different producers of your factory over time. You can choose the timespan as detailed in #4 above.

Note, that the timeframe influences the shown detailed production/consumption: the displayed watts is the summed up watts in the timeframe (in the graph below) divided by steps of that timeframe. This means you can see the consumption of radars for example, even if you have since removed them.

Expanding the player's network

High density accumulator array consisting of 48 basic accumulators and a substation providing 240 MJ storage capacity.

The power demand of a network will be fed by power sources in a specific order. If the primary source cannot fully satisfy the demand, additional power is drawn from the second source and so on until no more sources are available. See Power production#The_electric_priority for more info.

A newly-placed electric pole will be automatically connected to nearby poles according to the following rules:

1. It will be connected to the closest pole available
2. It won't be connected to 2 poles connected to each other (ie. it won't form a 3 pole triangle)
3. It will be connected to other available poles, starting with the closest ones
4. It will not be connected to more then 5 other poles.

A player can manually connect poles together with Copper Wire if they are within reach of eachother, as long as both poles do not already have 5 connections.

See also

• Optimizing energy consumption with productivity modules
• Power Production
• Liquid
• Units

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