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This article is about Energy in Subnautica. To see this subject's article on the Below Zero Wiki, click here.
Energy

Seabases

Seabases require Energy to produce breathable air and to power appliances such as the Fabricator, Power Cell Charger, and Battery Charger.

Seabases will draw power from internal generators (Bioreactors or Nuclear Reactors) installed inside the base and from any external generators (Solar Panels or Thermal Plants) within power transmission range. Power transmission is represented by a thin glowing blue line connecting an external generator to the base. The Power Transmitter can be used to connect generators to bases across greater distances. Power is drawn from the oldest generator first, regardless of the type of generator. Each generator will work to fill its own internal storage capacity and will not fill the capacity of other generators.

Lifepod 5 consumes and produces power much like a seabase. It draws its power from three special unremovable power cells, and it generates power from a built-in solar array during daylight hours.

Generators

Module Description Energy Source Capacity Power/min
Bioreactor
Bioreactor
Composts organic matter into electrical energy. Organic decomposition 500 50
Nuclear Reactor
Nuclear Reactor
Processes nuclear reactor rods. Nuclear fission 2500 250
Solar Panel
Solar Panel
Build on the ground or base exterior in the sun to charge. Stellar radiation 75 15.2 overnight at 110m or higher[1]
Thermal Plant
Thermal Plant
Converts heat to energy (> 25 °C) Heat 250 66 at 75°C[2]
  1. Actual output depends on how much sunlight the panel is receiving, see the Solar Panel page for details.
  2. Actual output depends on the temperature at the Thermal Plant's location.

Transmitter

Module Description Energy Source
Power Transmitter
Power Transmitter
Extends range of power source.

Items and vehicles

Some items and vehicles require a Battery or Power Cell to operate.


Spoiler alert: The following section contains story related material.


Their upgraded variants, the Ion Battery and Ion Power Cell, can also be used in place of their normal versions.


When Energy runs out, the player can replace the empty power source with a Battery or Power Cell from inventory. For handheld devices, equip the device and press R (Xbox One: XBOX X, PlayStation 4:Combops4sq). For vehicles, interact directly with the empty power cell.

  • The Seamoth's power cell is on the underside, towards the rear.
  • The Prawn Suit has two power cells near the storage.
  • The Cyclops has two banks of three power cells, on either side of the engine.

The Seamoth and the Prawn suit can also be recharged by docking at a Moonpool or Cyclops. While docked, they recharge at the same rate as if their power cells were in a Power Cell Charger.

Replacing a partially or fully depleted battery or power cell will give the player that used battery or power cell. They can be recharged using a Battery Charger or Power Cell Charger, both of which draw power from a Seabase or the Cyclops. They can also be recharged in place with the Swim Charge Fins (for batteries) or the appropriate vehicle generator module (for power cells).

Component Power Source
Flashlight
Flashlight
Battery
Floodlight
Floodlight
Seabase
Habitat Builder
Habitat Builder
Battery
Laser Cutter
Laser Cutter
Battery
Pathfinder Tool
Pathfinder Tool
Battery
Propulsion Cannon
Propulsion Cannon
Battery
Repair Tool
Repair Tool
Battery
Repulsion Cannon
Repulsion Cannon
Battery
Component Power Source
Scanner
Scanner
Battery
Seaglide
Seaglide
Battery
Stasis Rifle
Stasis Rifle
Battery
Cyclops
Cyclops
Power Cell
Prawn Suit
Prawn Suit
Power Cell
Seamoth
Seamoth
Power Cell
Lifepod 5
Lifepod 5
Solar Power Cell
Spotlight
Spotlight
Seabase

Vehicular Generators

Module Description Energy Source Power/min
Seamoth Solar Charger
Seamoth Solar Charger
An upgrade for the Seamoth that will convert stellar radiation into energy when possible. Stellar Radiation

60% Power Cell Charge (Daytime, Surface)

Exosuit Thermal Reactor Module
Prawn Suit Thermal Reactor
An upgrade for the PRAWN Suit that converts local heat into energy. Heat (>30°C)

Roughly 60% Power Cell Charge (70°C)

Cyclops Thermal Reactor Module
Cyclops Thermal Reactor
An upgrade for the Cyclops that converts local heat into energy. Heat (>35°C) (Needs Testing)

Creative Mode

The Cyclops, Seabases, and Lifepod 5 do not require Energy in Creative Mode.

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