This paper introduces coherence‑driven energy systems within the MID/QC framework, reframing energy as tension‑gradient configuration in the substrate. Classical models based on combustion, charge transport, and field mediation are replaced by coherence‑well dynamics, torsion‑neutral propagation, and resonance‑based extraction. The paper defines substrate‑native mechanisms for power generation, transfer, and storage, including tension‑gradient harvesting, harmonic coupling, and multi‑scale coherence integration. Applications span passive power systems, resonance‑aligned generators, torsion‑neutral transmission networks, and planetary‑scale infrastructure. This work establishes the foundation for MID/QC‑based energy engineering and completes the third paper of the Applied Substrate Engineering cluster.