Frontier Starfield
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Starfield Ship Reactor error fix | How to add modules that exceed reactor class

Here's why you can't use those modules!

A ship reactor regulates the maximum class of modules you can equip on your ship. For example, you must have a Class B reactor to fit a Class B module like a weapon or gravitational drive. This means it is crucial to select a reactor that can balance the requirements of your intended modules with the power output it can generate. However, the game doesn’t tell you how to obtain a higher class reactor in the first place, so you can use higher class modules, leading to some frustrating moments when attempting to upgrade your ship. Here’s how to add modules that exceed reactor class in Starfield.

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How to add modules that exceed reactor class in Starfield

Ship Reactor Class Starfield

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It’s important to remember that Starfield categorizes its modules from class A (lowest) to class C (highest). If you try to use a module you don’t have the necessary pilot skill rank for, you’ll get an error message saying, “Ship contains modules that exceed reactor class.” To fix this issue, you must increase your Piloting skill level to Rank 3 (Class B) or 4 (Class C) to use higher class modules. For example, if you improve your Piloting skill to Rank 4, which lets you fly Class C ships, you can then use a Class C reactor, allowing you to use ship upgrades of classes A, B, and C.

To understand why this is the case, let’s look at how your Piloting skill rank affects which module classes you use. There are three classes of components: Class A, Class B, and Class C. Some parts do not have a class listing so that they can work with any of the three classes. As a default, you will be a Class A pilot, which means you can only build Class A ships to fly. It is important to note that you can’t add modules that exceed the reactor class. For instance, if you have a Class A reactor, you cannot use a Class B engine.

Author’s Note: I wrote this guide while playing Starfield on Xbox Series S.

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Matthew Kevin Mitchell
Matthew Kevin Mitchell has been a contributing writer for PC Invasion and Attack of the Fanboy since 2022. Matthew primarily covers Manga like One Piece, horror movies like Scream, and survival horror games like Dead by Daylight. His favorite moment came during his first press event covering Scream 6 for AotF. He hails from Denver, Colorado, where he received his Bachelor of Science in Information Technology from Regis University. When he isn’t scaring himself silly or writing, he loves to play ice hockey, spoil his dog, and drink an unhealthy amount of coffee.