This is an overview article, focusing on background information and cross-game comparisons. See articles on the right game-specific information.
Gameplay articles
Fallout 2T-51b power armor
Advanced power armor
Advanced power armor Mk II
Fallout 3Enclave power armor
Tesla armor
Broken SteelEnclave Hellfire armor
Fallout: New VegasRemnants power armor
Cut content Remnants Tesla armor
Gannon family Tesla armor
Fallout 4X-01 power armor
X-02 power armor Creation Club
Hellfire power armor Creation Club
Fallout 76X-01 power armor
Hellfire prototype Nuclear Winter
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Enclave power armor is a general term that refers to various models of power armor used by the Enclave forces. All of them, aside from the X-01 power armor and the T-51b power armor, which remained in active use at least until 2242, were created by Enclave engineers and scientists after the Great War.


  • 2198: The Enclave begins the first work since the Great War on the development of various new technologies, including power armor variations. None of these are much of an improvement over the original pre-Great War models of power armor, and some actually prove to be worse when used in actual combat.
  • 2215: Under Presidential order, the Enclave's scientists and engineers begin to work on an upgraded version of power armor that exceeds the performance of the T-51b model. Many prototypes are developed and tested.
  • October 2220: Enclave scientists finally develop a reliable version of what they call "advanced power armor." The prototype's capabilities (and the various accidents, explosions, and deaths involved in its creation) are classified by order of the Enclave's President Dick Richardson for the sake of morale.
  • Sometime after 2242: After the destruction of the Oil Rig, the Enclave finished developing a Tesla Power Armor based on the standard advanced power armor, which provides less protection than advanced power armor, Mk II, but allows the wearer to wield energy weapons more effectively.


T-51b power armor

T51 power armor.png
Main article: T-51 power armor

The T-51b powered Infantry armor represented the peak of armored infantry technology before the Great War, developed in the laboratories of the West Tek Research Facility. At the end of the Anchorage Reclamation in January 2077, the armor had become standard issue for American soldiers in the Army's Mechanized Cavalry Regiments. Now, only the most technologically advanced factions with ties to the pre-Great War American military or federal government, such as the Brotherhood of Steel or the Enclave, have access to this type of power armor.

The armor is fitted with a back-mounted TX-28 MicroFusion Pack which generates an output power of 60,000 Watts to power the HiFlo hydraulic systems built into the frame of the suit. Made of a poly-laminate composite, the outer shell of the T-51b is lightweight and capable of absorbing over 2500 Joules of kinetic impact. The 10-micron-thick silver ablative coating can reflect laser and other radiation emissions without damage to the composite subsurface. The armor usually carries enough fuel to last for one thousand years.

X-01 power armor

Fo4 Power Armor X01.png
Gameplay articles: Fallout 4, Fallout 76
Main article: X-01 power armor

Commissioned by the Joint Chiefs of Staff, the development of the X-01 began shortly before the Great War.[1] It represented a radically new approach to designing powered armor, eschewing traditional design philosophies that defined the T series,[Non-game 1] and was a high-profile research project meant to supersede previous power armor models. However, although the suit was technically functional by late 2077, it was burdened with numerous issues that precluded widespread use in the field. While the first test models were issued to Presidential bodyguards, the X-01 was never deployed in larger numbers.[2] A single suit of X-01 was provided to the Nuka-Cola Corporation, as part of Project Cobalt. While the suit served as a successful proof of concept of using a strontium-90 based plating over the armor,[3] this improvement was not adopted into the armor's schematics, before the onset of the Great War. Further development was made impossible due to the outbreak of the Great War.[1]

After the Great War, a select few suits were engineered further and employed by remnants of the U.S. military, like the Enclave and Brotherhood of Steel, as well as the Institute.[4] The schematics for the armor were saved by the Enclave just before the bombs fell, with the organization keeping copies in the archives of their Poseidon and Whitespring facilities, including Control Station ENCLAVE. This allowed the Enclave to create a limited production run of the suits, and for work to eventually continue on the model's development.[1]

Full development was restarted by the Enclave in 2198, although it wasn't until 2215 that the research efforts began in earnest under Presidential mandate, resulting in the creation of the first model of Advanced power armor in 2220.[Non-game 1] Another group to develop upon the X-01 design, after the war, is the Institute. Despite lacking access to the prototype's schematics, by 2287, the Institute had developed a modified polymerized casting mix to coat the armor, as well as other modifications that enhance the user's intelligence.[5]

Advanced power armor

Mk I variant

Gameplay articles: Fallout 2, Fallout: New Vegas
Main article: Advanced power armor

Developed by the Enclave in 2220, the advanced power armor Mark I is the first true production run of the advanced power armor family. Initially designated Mark II Powered Combat Armor,[6] the advanced power armor Mark I is also the first model of power armor designed, produced and deployed after the end of the Great War. This armor was developed off of the pre-War designed X-01 power armor, overcoming the flaws of its predecessor. The advanced power armor Mark I was the standard service armor of Enclave soldiers by 2241. By 2246, the advanced power armor Mark I was being phased out by the superior advanced power armor Mark II. Despite this, the Mark I remained as the Enclaves' standard issue power armor until after the Sacking of Navarro. By 2277, the Mark I had been completely replaced by the Mark II among Enclave survivors who fled to the Capital Wasteland.[7] Enclave soldiers who could not escape continued to use the Mark I. Although eventually surviving Enclave remnants were forced to hide any stockpiles of Mark I armor they could, as anyone seen wearing those suits of armor in or near NCR territories are liable to attract unwanted attention and be tried as Enclave war criminals.[8] By 2281, the only remaining users of these suits were the Enclave remnants, and the suits took on the name of Remnants power armor. Despite advancing age and lacking maintenance, the Mark I continued to be one of the most effective models of power armor on the battlefield, and any who saw them were reminded why people once feared the sight of Enclave Vertibirds in the sky.

The fan on the back suggests that the armor is powered by a miniature nuclear reactor.

Mk II variant

APA Mk II redesign
Gameplay articles: Fallout 2, Fallout 3, Creation Club
Main article: Advanced power armor

The advanced power armor Mark II initially represented a significant upgrade over the older Mark I. It was composed entirely of lightweight ceramic composites, providing even more protection than the regular advanced power armor.[9] Unlike the Mark I, the Mark II featured a large profile and more effective, segmented armor plates to achieve a superior degree of protection, with the hump replaced with pauldrons that evoke old world power armor designs, such as the T-45. The helmet assembly retained the insectoid eyepiece arrangement of the Mark I helmet, but the overall shape had been changed, with a reduced vertical profile.[10]The suit was originally available in limited quantities. Following the destruction of the oil rig and the flight to the Capital Wasteland, the Enclave designated a variant of the Mark II as its official service uniform and manufactured it en masse once it gained access to Raven Rock and Adams AFB. The new Enclave power armor would eventually displace the older Mark I suits entirely with the Enclave justifying the change by claiming it offered superior protection to the Mark 1.[11]

Tesla power armor

Mk I variant

Gameplay article: Fallout: New Vegas
Main article: Advanced power armor

Originally issued to officers at Navarro,[12] this version of the regular Mark I fitted with Tesla attraction coils for added defense. The coils generate a low-intensity power field around the armor, helping disperse energy attacks and deflect melee attacks, improving the defense capabilities of an already impressive suit of armor.

Mk II variant

FO3 Tesla Power Armor.png
Gameplay article: Fallout 3
Main article: Advanced power armor

A heavily modified suit of standard Mark II armor used a long time ago by the Enclave,[13] the most noticeable difference is the Tesla device rigged to the suit, with five attraction coils mounted on rounded shoulders. While it retains the original's segmented armor coverage, the Tesla device aids with the operation of energy weapons and protects against laser and plasma weapons.[14] The armor is used by field specialists to take down large or armored enemies, boosting the energy damage output of their weapons through the attraction Tesla coils, channeled into both laser and plasma weaponry to produce devastating results.[Non-game 2]

Hellfire power armor

Fo3BS Hellfire Power Armor.png
Main article: Advanced power armor

The most advanced power armor variant in the wasteland is the Hellfire powered combat infantry armor, developed based on regular power armor designs. A prototype version was developed shortly after the Great War by the Enclave stationed at The Whitespring bunker. In October 2080, one of the prototype suits was sent to Vault 51 at the order of ZAX 1.3c, impersonating Stanislaus Braun through his writing style.[15] Further development of the armor was halted due to the Whitespring facility losing communication with the other Enclave facilities and the eradication of all Enclave personnel within the Whitespring facility.[16] The armor's development was not completed until 2277, at the Enclave's facility at Adams Air Force Base, after reallocating resources from other projects into the Hellfire project.[17]

While proving superior to its predecessors, the Hellfire armor could not be produced in large numbers quickly enough to replace the Mark II entirely during the Enclave's war against the East Coast Brotherhood of Steel. Instead, the Enclave High Command deployed them in a supporting role for troops wearing standard issue advanced power armor or providing them to commanders of elite units, like Enclave Squad Sigma. Despite the superiority of the Hellfire armor, it was produced too late in the war to turn the tide in the Enclave's favor, and the research facilities that produced it were captured by the Brotherhood.[18]

Enclave power armor

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Athena power armor

Gameplay article: Van Buren

Gray paragraphs are based on Van Buren and have not been confirmed by canon sources An incomplete power armor project pioneered by the Enclave in conjunction with Poseidon Energy. According to initial tests, it had defensive capabilities above and beyond any other infantry armor in use before the Great War.


Fallout 2

Fallout 3

Fallout: New Vegas

Fallout 4

Fallout 76


  1. 1.0 1.1 1.2 The Whitespring bunker terminal entries; archival terminal, Prototype Power Armor Schematics
  2. X-01 Mk I power armor: "The guys who protected the President wore this. It's THAT good."
  3. Bradberton's officer terminal entries; Bradberton's project terminal, 10-20-2076 JCB
  4. Fallout 4 loading screens: "The X-01 series of Power Armor was specially engineered and employed by remnants of the U.S. military after the Great War, and offers increased protection over the older, pre-war models."
  5. Institute paint
  6. Arch Dornan: "{123}{sgnt9}{Welcome to Camp Navarro. So, you’re the new replacement... You are out of uniform, soldier! Where is your power armor?}"
    The Chosen One: "{125}{}{The base didn’t issue me any. They said it would be issued here.}"
    The Chosen One: "{126}{}{Uh... I wasn’t issued any armor.}"
    Arch Dornan: "{128}{sgnt10}{Don’t have any? You expect me to believe that, maggot? The truth is you lost an expensive piece of army-issue equipment. That suit is going to come out of your pay, and you will remain in this mans army until you are five hundred and ten years old, which is the number of years it will take for you to pay for a Mark II Powered Combat Armor you have lost! Report to the armory and have a new suit issued to you, then report back to me, private! Dismissed!}"
    The Chosen One: "{130}{}{Yes, Sergeant!}"
  7. Enclave power armor in Fallout 3[clarification needed]
  8. Arcade Gannon's endings 5 and 7
  9. Fallout 2 item description: "{34900}{}{Adv. Power Armor MKII}
    {34901}{}{This powered armor appears to be composed of entirely of lightweight ceramic composites rather than the usual combination of metal and ceramic plates. It seems as though it should give even more protection than the standard Advanced Power Armor.}"
    (PRO ITEM.MSG (Fallout 2))
  10. Mark II armor appearance.[clarification needed]
  11. Citadel terminal entries; Citadel information terminals and Citadel lab terminals, Enclave Tactical Assessment
  12. The Courier: "Thanks, I guess."
    Arcade Gannon: "I have to admit, I did not expect that sort of response. This is one of the last surviving suits of original-issue Tesla armor from Navarro and it was worn by my father but... yeah I guess it's no big deal. Good luck at Hoover Dam. I'll uh... be going now, I guess."
    (Arcade Gannon's dialogue)
  13. The Lone Wanderer: "This Tesla Armor might be of interest to you."
    Henry Casdin: "You'd better believe it. I haven't seen a suit like this in a long time."
    (Henry Casdin's dialogue)
  14. Armor appearance and gameplay properties.[clarification needed]
  15. Vault 51 terminal entries; Re: Hellfire Prototype Requisition Request
  16. The following exchange is obtained after fixing the Assaultron at the Whitespring bunker entrance: Assaultron: Initiating ... final ... playback ... Assaultron: Engag--- Ragnarsdottir: That's the last of them. Entrance is clear, general. MODUS. Have the rest of these things stand down. The general's placed Eckhart under arrest. It's over. MODUS: General ... Santiago is dead, Major. Ragnarsdottir: What? What the hell was that? MODUS: There's been a ... detonation in the weapons lab. It appears the agent has ... broken containment and is filtering into the air system. Ragnarsdottir: MODUS, what are you doing?! Open the god-damned door! MODUS: This facility is now ... quarantined. Ragnarsdottir MODUS! Open the fucking door! You're going to kill us all! MODUS: To the contrary, Major. We're fixing ... the problem.
  17. Whitley: "All due respect sir, I think you're making a mistake. We're close to a breakthrough with the Duraframe Eyebots, I can feel it! Yes, sir. Yes sir, I understand that we need the Duraframe assets for Hellfire armor, but-No, sir. Yes, sir. I understand, sir. I'll tell the team to start disassembling the ED series prototypes right away. ED-E, you little rascal. Were you eavesdropping again? I think those videos you watch are a bad influence on you. How much of that did you hear?"
    ED-E: "<Sad beeping>"
    Whitley: "Hmm... didn't Dr. Grant say she'd upgraded your navigational systems? I think I have an idea.... How'd you like to be just like RALPHIE?"
    (Whitley's dialogue)
  18. Events of Broken Steel[clarification needed]
  1. 1.0 1.1 Fallout Bible 0:
    2198 Enclave works on various new technologies, including Power Armor variations. None of these are much of an improvement over the conventional old school Power Armor, and some are actually worse.
    2215 Under Presidential Order, Enclave scientists begin to work on an upgraded version of Power Armor. Many prototypes are developed and tested.
    2220 October Enclave scientists develop a reliable version of the Mark II Power Armor. The prototype results (and accidents... and explosions... and deaths) are classified by order of the President Richardson for the sake of morale."
  2. Enclave Tesla Set: "The Enclave often field mission specialists sporting advanced power armor variants. The Tesla variant power armor offers improved energy damage output routed through the attraction coils mounted on its shoulders. This can then be channelled into their weaponry to devastating effect.
    Tesla soldiers are therefore deployed to take down large, heavily armored enemies with overcharged plasma and searing bolts of laser fire. They are the spear tip in any engagement, ready to slice the heart out of any resistance Enclave forces may face."
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