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{{Version|1.8}}
Equipment variants are concrete, country-specific classes of [[equipment]] which are based on an equipment type. They may include customizations such as [[design company|design companies]], upgrades, or modules.

== Base ==
{{SVersion|1.8}}
When a country unlocks an equipment type by researching the corresponding technology, a base variant of it gets created. Where applicable, it uses the design company the country has at that moment. It is not necessary to already have the design company when the research starts.

== Upgrade ==
{{Sversion|1.8}}
Several types of equipment can be further upgraded using experience. Upgraded variants may be created of [[tanks]], tank-based weapons, [[airplanes]] and [[ship]]s using [[experience]] to upgrade specific attributes. Sometimes a small improvement in speed, protection, or firepower can make a significant difference in the field.

Variants are expensive in XP, so their use should take into account the expected benefit, production volume, and service lifetime of the variant in deciding where to commit these resources. This is especially important for capital ships, as they take a very long time to build and there are large year-gaps between models.

Each upgrade may be selected up to five times and may be made at different times. Existing equipment upgrades may be viewed in the Production screen. Upgrades in one area may reduce performance in another area - e.g., complexity reducing reliability or increased weight-reducing speed. Note that land units may use maintenance support companies that increase reliability for equipment in that division, and also that equipment stats and performance may also be affected by government staff with particular skills that provide modifiers.

For land equipment, the first upgrade level costs {{hover|NMilitary.LAND_EQUIPMENT_BASE_COST|10}} experience, for air and naval equipment it costs {{hover|NMilitary.NAVAL_EQUIPMENT_BASE_COST and NMilitary.AIR_EQUIPMENT_BASE_COST|25}}. Each subsequent level costs {{hover|NMilitary.LAND_EQUIPMENT_RAMP_COST, NMilitary.NAVAL_EQUIPMENT_RAMP_COST and NMilitary.AIR_EQUIPMENT_RAMP_COST|5}} experience more.

With {{icon|mtg|1}} naval equipment upgrades are not available, as ship classes are designed using modules instead.

<div style="display:flex;justify-content:space-evenly">
{|class = "wikitable mw-collapsible mw-collapsed"
|+ {{nowrap|List of land equipment upgrades}}
! Upgrade !! Types !! Bonuses !! Penalties
|-
| Armor || all armor || {{green|+5%}} Armor || {{red|-2%}} Speed<br/>{{red|-5%}} Reliability
|-
| Engine || all armor || {{green|+4%}} Speed || 
|-
| Reliability || all armor || {{green|+10%}} Reliability || 
|-
| Tank Gun || Tank || {{green|+3%}} Soft Attack<br/>{{green|+10%}} Hard Attack<br/>{{green|+5%}} Piercing || {{red|-2%}} Speed<br/>{{red|-5%}} Reliability
|-
| AA Gun || Self-propelled AA || {{green|+15%}} Air Attack || {{red|-2%}} Speed<br/>{{red|-5%}} Reliability
|-
| AT Gun || Tank destroyer || {{green|+10%}} Soft Attack<br/>{{green|+10%}} Hard Attack<br/>{{green|+5%}} Piercing || {{red|-2%}} Speed<br/>{{red|-5%}} Reliability
|-
| Artillery || Self-propelled artillery || {{green|+3%}} Soft Attack || {{red|-2%}} Speed<br/>{{red|-5%}} Reliability
|}
{|class = "wikitable mw-collapsible mw-collapsed"
|+ {{nowrap|List of naval equipment upgrades}}
|-
! Upgrade !! Types !! Bonuses !! Penalties
|-
| <span id="ship_gun_upgrade">Gun</span> || <abbr title="light cruiser">CL</abbr><br/><abbr title="heavy cruiser">CA</abbr><br/>torpedo cruiser<br/>heavy ships || {{green|+4%}} Light Attack<br/>{{green|+5%}} Light Piercing<br/>{{green|+4%}} Heavy Attack<br/>{{green|+5%}} Heavy Piercing || {{red|-1%}} Max Speed<br/>{{red|-0.5%}} Reliability
|-
| <span id="ship_torpedo_upgrade">Torpedo || torpedo cruiser<br/><abbr title="destroyer">DD</abbr> || {{green|+7.5%}} Torpedo attack || {{red|-1%}} Max Speed<br/>{{red|-1%}} Max Range
|-
| <span id="ship_armor_upgrade">Armor</span> || <abbr title="heavy cruiser">CA</abbr>, heavy ships || {{green|+5%}} Armor || {{red|-1%}} Speed
|-
| <span id="ship_engine_upgrade">Engine</span> || <abbr title="carrier">CV</abbr>, heavy ships<br/><abbr title="light cruiser">CL</abbr>, <abbr title="heavy cruiser">CA</abbr>, torpedo cruiser || {{green|+3%}} Speed<br/>{{green|+5%}} Max Range || {{red|-0.5%}} Reliability
|-
| <span id="destroyer_engine_upgrade">Engine</span> || <abbr title="destroyer">DD</abbr> || {{green|+3%}} Speed<br/>{{green|+5%}} Max Range ||
|-
| <span id="ship_reliability_upgrade">Reliability</span> || <abbr title="carrier">CV</abbr>, heavy ships, <abbr title="submarine">SS</abbr><br/><abbr title="light cruiser">CL</abbr>, <abbr title="heavy cruiser">CA</abbr>, torpedo cruiser || {{green|+1.5%}} Reliability || {{red|-4%}} Max Range
|-
| <span id="ship_anti_air_upgrade">Anti-Air</span> || <abbr title="light cruiser">CL</abbr>, <abbr title="destroyer">DD</abbr> || {{green|+5%}} Anti-air|| {{red|-1%}} Max Speed
|-
| <span id="ship_ASW_upgrade">ASW</span> || <abbr title="destroyer">DD</abbr> || {{green|+4%}} Sub Detection<br/>{{green|+4%}} Depth Charge || {{red|-1%}} Torpedo Attack 
|-
| <span id="sub_torpedo_upgrade">Torpedo</span> || <abbr title="submarine">SS</abbr> || {{green|+4%}} Torpedo attack || {{red|-2%}} Max Speed
|-
| <span id="sub_stealth_upgrade">Stealth</span> || <abbr title="submarine">SS</abbr> || {{green|-5%}} Sub Visibility || {{red|-2%}} Max Speed
|-
| <span id="sub_engine_upgrade">Engine</span || <abbr title="submarine">SS</abbr> || {{green|+5%}} Max Speed<br/>{{green|+5%}} Max Range || {{red|+5%}} Sub Visibility<br/>{{red|-0.5%}} Reliability
|-
| <span id="ship_deckspace_upgrade">Deck Space</span> || <abbr title="carrier">CV</abbr> || {{green|+7.5%}} Deck Space || {{red|-5%}} Armor
|-
| <span id="carrier_armor_upgrade">Armor</span> || <abbr title="carrier">CV</abbr> || {{green|+10%}} Armor<br/>{{green|+1%}} HP || {{red|-4%}} Deck Space
|}
{|class = "wikitable mw-collapsible mw-collapsed"
|+ {{nowrap|List of air equipment upgrades}}
|-
! Upgrade !! Types !! Bonuses !! Penalties
|-
| <span id="plane_gun_upgrade">Weapons</span>  || (jet/heavy) fighter, rocket interceptor || {{green|+10%}} Air Attack || {{red|-1%}} Speed<br/>{{red|-10%}} Reliability<br/>{{red|-5%}} Agility
|-
| <span id="cv_plane_gun_upgrade">Weapons</span> || carrier fighter || {{green|+10%}} Air Attack || {{red|-1%}} Speed<br/>{{red|-10%}} Reliability<br/>{{red|-15%}} Agility
|-
| <span id="plane_range_upgrade">Range</span> || all non-carrier types || {{green|+10%}} Range || {{red|-10%}} Reliability
|-
| <span id="cv_plane_range_upgrade">Range</span> || all carrier types || {{green|+15%}} Range || {{red|-10%}} Reliability
|-
| <span id="plane_engine_upgrade">Engine</span> || all || {{green|+2%}} Speed<br/>{{green|+5%}} Agility ||
|-
| <span id="plane_reliability_upgrade">Reliability</span> || all || {{green|+10%}} Reliability ||
|-
| <span id="plane_naval_upgrade">Attack</span> || <abbr title="naval bomber">NAV</abbr> || {{green|+5%}} Naval Attack || {{red|-10%}} Reliability
|-
| <span id="cv_plane_naval_upgrade">Attack</span> || carrier <abbr title="naval bomber">NAV</abbr> || {{green|+5%}} Naval Attack || {{red|-15%}} Reliability
|-
| <span id="plane_bomb_upgrade">Bombing</span> || (jet) strategic bomber || {{green|+5%}} Bombing || {{red|-10%}} Reliability<br/>{{red|-5%}} Range
|-
| <span id="plane_tac_bomb_upgrade">Bombing</span> || (jet) <abbr title="tactical bomber">TAC</abbr> || {{green|+2%}} Bombing<br/>{{green|+2%}} Ground Attack || {{red|-10%}} Reliability<br/>{{red|-5%}} Agility
|-
| <span id="plane_cas_upgrade">Attack</span> || (carrier) <abbr title="close air support">CAS</abbr> || {{green|+2%}} Air Attack<br/>{{green|+5%}} Ground Attack || {{red|-10%}} Reliability<br/>{{red|-5%}} Agility
|}
</div>

== Module ==
{{SVersion|1.8}}
Modules extend the capabilities of an equipment variant in a more detailed manner than upgrades. Ship hulls as the basic equipment types offer a number of module slots that can be used. Without {{icon|mtg|1}}, researched ship equipment types automatically combine ship hulls and a standard configuration of modules that cannot be changed. With {{icon|mtg|1}}, the hulls and modules are researched individually and by spending naval experience are combined in the ship designer.

== Statistics ==
{{See also|Equipment#Statistics}}
The statistics of an equipment variant are based on the underlying equipment type, its design company, and upgrades or modules. Additive and averaged additive stats from modules are added to the stats of the equipment type. Multiplicative module stats as well as designer and upgrade stats stack additively among each other and are then applied as one factor.

For example if Japan has Mitsubishi as its air design company (+20% agility, +10% speed) while completing research on the 1940 fighter equipment type (agility 65), the resulting equipment variant (Ki-43 Hayabusa) has 65 * 120% = 78 agility. If Japan upgrades this variant with five points into Engine upgrade (5 * 5%), the resulting variant Ki-43 Hayabusa Kai A has 65 * 145% = 94.25 agility.

[[分类:Military]]

[[hoi4de:Variant]]
[[hoi4es:Variant]]
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[[hoi4ru:Variant]]