Thanks! In hind sight, I should have given more attention to the overall narrative and instructions to make the gameplay less confusing. I meant to add more labels for the interaction on some objects like the batteries and generators, but ran into a few issues and found the solution a bit too late. To clear up the confusion, when getting close to the generator end pressing E, the power will immediately get fully restored. I should have added more sound cues for when it's successfully used.
I appreciate the kind words and feedback! I'll keep it in mind for when I continue working on the game!