The net energy change summary in the HUD doesn't take into account the contribution from a Fusion Compressor. e.g. I have no reactor right now, would expect it to be +24 but it just shows +4 for the built-in energy generation (I have one utility using -1 energy).
Okay I'll factor that in, thanks. Interesting that it's been in there for four years and no one needed this, but I guess most players avoid compressors in general since they're pretty specialty parts!