Energy is the second resource in Zero-K.
The primary sources of energy are energy-producing structures:
- Solar Collector
- Wind/Tidal Generator
- Geothermal Generator
- Advanced Geothermal
- Fusion Reactor
- Singularity Reactor
Most energy-producing structures may be construted anywhere. Geothermal Generators and Advanced Geothermals may only be constructed on geothermal vents.
Constructing any unit or building requires Energy. Repairing and resurrecting units and buildings also requires Energy, as does operating cloaks, shields, jammers and radar.