Electricity

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Electricity is a system and resource in Space Engineers that is used to power most devices. It is created using a large or small reactor, or by using a Solar Panel. Any device that has a direct block connection to a reactor will be powered by a reactor; that is, if a reactor is on a ship, all devices attached to that ship should receive power granted there is enough power to receive. Electricity can pass through rotor blocks, pistons, and locked connectors (incl. small-to-large connections), but not landing gear.

Reactors

Reactors are the main source of electricity. They are powered by Uranium Ingots. 1 ingot produces 68.76 MWs or 0.0191 MWh of energy. Consumption of Uranium is solely decided by your current energy consumption. There is no difference in efficiency between large and small reactors. It also makes no difference how many reactors you have online.

The maximum amount a reactor can power:

Reactor Small Ship [MW] Large Ship [MW]
Small Reactor 0.1 5
Large Reactor 3.5 100
Solar Panel 0.03* 0.12*

(*) Solar Panels have a maximum output depending on their angle to the sun and the amount of actually lit surface. Given values are the maximum achievable output with perfect conditions.

Power Usage

Thruster power usage

Ship Thrust Minimum Power [MW] Maximum Power [MW] Inertial Dampeners [MW]
Small Small 0.0002 0.0336 0.0504
Small Large 0.0002 0.4 0.6
Large Small 0.0002 0.56 0.84
Large Large 0.0002 6.72 10.08

Refinery and assembler power usage (Individual Usage)

Mode Power Usage [MW]
Standby 0.001
Operational 0.560

Other component power usages

Component Small Ship [MW] Large Ship [MW]
Gravity Generator N/A 0 - 0.56713**
Artificial Mass 0.025 0.6
Interior Light N/A 0.0004
Medical Room N/A 0.002
Door N/A 0.00003
Gyroscope 0.00003 0.0015
Reflector Light 0.012 0.0112
Beacon 0 - 0.2 0.1008
Antenna 0 - 0.02 4
Ore Detector 0.002 0.002
Drill 0 - 0.002 0.000018 - 0.002
Gatling/Missile Turret N/A 0.1008
Interior Turret N/A 0.1008

(**) The power cost of Gravity Generator is directly proportional to the field size and acceleration (absolute value, so 1G consumes the same as -1G).