But what I have is extreme condensation. When I remove the carpeted floor, everything is covered in condensation. Has anyone encountered this and have a fix?

 

What's the typical weather these days in your neck of the woods? Is the car garaged or outdoors? How about during the day, what's the environment like?

Have you removed the carpet and let everything dry out (carpet and trunk bay)?

 

Is the battery properly vented?

 

Well, at some point, somehow, water got into the trunk. Most likely rainwater from above or roadwater from below.

As mentioned, remove everything and let it thoroughly dry....and then start looking for the source of the leak....which might not be easy to find. Possible rear glass leak? Or, roadwater can enter from below in some cases....missing trunk floor grommet or such.

Cheers
DD