Application‑focused Fuel Cell Power Module segmentation allocates market share by end‑use environment, reflecting distinct demand drivers. The Transportation segment—encompassing passenger vehicles, buses, and rail—holds the largest slice at 45%, propelled by regulatory emissions targets and OEM commitments to zero‑emission fleets. Stationary Power applications, including backup power for data centers, telecom sites, and micro‑grids, account for 35% of the market, driven by reliability requirements and the economics of fuel‑cell‑based distributed generation. The Portable segment, covering handheld devices, UAVs, and field equipment, represents 20%, where weight, rapid start‑up, and silent operation create a competitive edge over batteries. This application‑centric market taxonomy demonstrates how each use case contributes to total market size, enabling stakeholders to target growth opportunities aligned with sector‑specific performance and cost criteria.