Energy Capacity

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Energy of a Warframe is used mainly to power abilities and melee channeling. All Warframes have 4 abilities that at base, cost up to 100 energy to cast. Every Warframe has their own energy-pool with varying capacities depending on the types and costs of their various abilities. For channeling, energy is used to provide bonus damage and other effects such as life steal, and to enable parrying while blocking which will nullify all incoming damage, reflect some damage back, and open up melee attackers for finishers, but will drain energy on every blocked attack.

Like health and shields, a Warframe's energy capacity scales with their rank and through the use of mods or buffs. It is also worth noting that the words "power" and "energy" are often used interchangeably by members of the community.

Increasing Energy Capacity

Mods

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These are the mods currently available in the game. It is worth noting that Flow and Primed Flow cannot be used in the same build.

Formula For Modded Energy Capacity

These mods increase the energy capacity of a Warframe following the following formula:

$\text{Energy}_{total}=\text{Energy}_{max}+(\text{Energy}_{base}\times \text{Mod Multiplier})$

So as an example taking Volt Prime with 200 base energy and 300 max energy he will have:

• With Flow: $300 + (200 \times 1.5)=600$
• With Primed Flow: $300+(200 \times 2.75)=850$
• With Primed Flow and Endurance Drift: $300+(200 \times 2.90)=880$

Buffs

The only buff currently available to increase energy capacity is Cephalon Suda's Entropy effect. Entropy will release an AoE radial attack 25m around the player, dealing 1000  damage and applying the Magnetic Status Effect to enemies in range reducing their shields. It will also restore 25% of the player's base Energy, and provide a (base) Energy boost of +25% for 30 seconds.

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Warframe Starting Energy

Formula

Upon loading into any mission, each Warframe has a fixed amount of energy that they start with. This amount of energy is calculated based off of the Warframe's free mod capacity and a base value specific for each Warframe (differs even between normal and prime variants). The formula followed is:

$\text{Starting Energy}=\text{Initial Energy}+5(\text{Free Mod Capacity})$

Table of Initial Energies

The initial energy of a Warframe is given from the following table. Do note that this table is currently still under construction and it is still unknown whether these values are calculated off some other attributes or simply fixed parameters for each Warframe. This area of research is still very actively pursued.

View Initial Energy of Rank 30 Warframes at 0 Mod Capacity List▾▾

Warframe	Energy Pool
Ash	??
Ash Prime	50
Atlas	50
Banshee	??
Banshee Prime	125
Chroma	75
Ember	??
Ember Prime	75
Equinox	100
Excalibur	50
Excalibur Prime	??
Frost	??
Frost Prime	50
Gara	75
Harrow	50
Hydroid	??
Hydroid Prime	100
Inaros	50
Ivara	75
Limbo	100
Loki	??
Loki Prime	125
Mag	50
Mag Prime	50
Mesa	50
Mirage	??
Mirage Prime	125
Nekros	50
Nekros Prime	75
Nezha	125
Nidus	50
Nova	50
Nova Prime	150
Nyx	??
Nyx Prime	150
Oberon	??
Oberon Prime	150
Octavia	100
Rhino	??
Rhino Prime	50
Saryn	??
Saryn Prime	100
Titania	50
Trinity	??
Trinity Prime	125
Valkyr	??
Valkyr Prime	100
Vauban	??
Vauban Prime	100
Volt	??
Volt Prime	125
Wukong	50
Zephyr	50

Effective Energy Capacity

Casting Effective Capacity

Similarly to how one can define the concept of "effective health" by weighting the number of hit-points with the corresponding damage reduction, one can also define the concept of casting effective energy capacity by weighting the energy capacity using the Ability Efficiency factor:

$\text{Effective Energy Capacity}_{casting}=\frac{\text{Energy Capacity}}{2-\text{Ability Efficiency}}$

Since casting efficiency is currently capped at 175%, the highest possible upper-bound for the casting effective energy capacity is:

$\text{Effective Energy Capacity}_{casting}\leq 4\times\text{Energy Capacity}$

Toggle Effective Capacity

Since the efficiency of toggle abilities depends also on the duration, in that case the formula becomes:

$\text{Effective Energy Capacity}_{toggle}=\frac{\text{Energy Capacity}\times\text{Ability Duration}}{2-\text{Ability Efficiency}}$

For the case where no energy is recovered and a constant rate of energy drain, one can also consider the effective toggle duration as follows: $\text{Effective Toggle Duration}=\frac{\text{Effective Energy Capacity}_{toggle}}{\text{Base Drain Rate}}$

$\text{Effective Toggle Duration}=\frac{\text{Energy Capacity}\times\text{Ability Duration}}{\text{Base Drain Rate}(2-\text{Ability Efficiency})}$

$\text{Effective Toggle Duration}=\frac{\text{Energy Capacity}}{\text{Modified Drain Rate}}$

Due to the definition of the terms, there are many ways in-which the formula for effective toggle duration can be expressed.

Apart from toggle duration, this can be used to work out the effective duration granted per energy pick up.

Examples

Suppose a prowling Ivara has a modded drain of 0.25 energy/sec. An orb of 50 energy would provide:

$\frac{50}{0.25}=200\text{ seconds}$

Considering the same Ivara with full energy pool of 744 capacity, she can remain in prowl for:

$\frac{744}{0.25}=2,976\text{ seconds}\approx 50\text{ minutes}$

Restoring Energy

In missions, there are various ways to restore energy:

• Energy can be picked up during a mission from Blue Orbs. Blue Orbs dropped by enemies restore 25 energy while containers drops will restore 50 Energy.
• Some Arcane Alternate Helmets affect a Warframe's maximum energy.
• Harrow's Thurible grants players inside its aura a variable amount of energy from kills made by Harrow, depending on how long the ability was charged and whether the enemies were killed by bodyshot or headshot.
• Trinity's Energy Vampire allows a player to regain energy by standing inside the energy pulses the target releases (target is stunned the entire time).
• Limbo's Rift Plane slowly restores energy for all players within it. Can stack with Energy Siphon.
• Octavia's Inspiration passive slowly restores energy over time for all players that were near Octavia when she cast an ability.
• Team Energy Restores are consumables that grant Energy to nearby teammates in varying amounts, up to 400 total.
• Weapons triggering an Entropy effect restore 25% of the player's base Energy, and provide a base Energy boost of +25% for 30 seconds.
• Weapons triggering a Blight effect restore 25% of the player's base Energy, and provide a (base) movement speed boost of +10% for 30 seconds.
• Zenurik's focus nodes have multiple ways in which a player can regenerate energy.
• Notable mods that affect energy generation:
  •  Rage and  Hunter Adrenaline - Converts damage on health to energy.
  •  Equilibrium - Health pickups restore a certain amount of energy alongside health recovery (but only if the Orb is picked up).
  • The Aura  Energy Siphon slowly restores energy for all players based on its mod rank. Multiple copies of this aura allow for faster energy recovery.
  •  Coaction Drift - Improves the Warframe's equipped Aura, including  Energy Siphon.
• Notable arcanes that affect energy generation:
  • Arcane Energize
  • Exodia Brave

It is important to note that on most occasions, toggle abilities disable energy generation from team abilities, consumables, or passive regeneration methods

Using Energy as Health

Mods

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These mods stop lethal damage by allowing hits to drain your energy after your health is depleted in exchange for occasionally staggering the player

Notes

• These mods synergize extremely well with Rage and Hunter Adrenaline since all the health drained before taking lethal damage would ensure that there is enough energy for the mods to consume.