The Idea is very simple: You've Overclocker, Transformer and Energy Storage Upgrade:
I think we should have "Efficienty Upgrade".
It would decrease the Machine Energy-Consumption/Increase Gen production (of course, only for basic one and Geothermal, and Fuel Gen if it get added).
2 option: 1) It's unstackable (so you max 4 per machine, and maybe 1 per gen)
2) It's very inefficient (so for example, it could divide energy consumption by 2 with 16 Upgrader)
The craft would need circuit, advanced Circuit, Golden Cabble and I don't know what else.
I know, it has probably already been suggested/denied, but not for Gen AND machine, isn't it ?
I'm just suggesting an Idea, I know the concept has to be improved.
Just talk about it.