At larger scales, safety risks do not increase linearly; they become systemic and tightly interconnected. Parameters such as hydrogen purity control, diaphragm integrity, gas separation, thermal management, electrical systems, and electrolyte handling grow significantly more complex. If these aspects are not rigorously engineered and validated under realistic operating conditions, they can jeopardise plant availability, accelerate degradation, and expose personnel and assets to unacceptable risk.
A key industry challenge is the scarcity of real-world safety data from large-scale operating plants. Many safety claims continue to rely on theoretical assumptions, short-duration tests, or vendor-specific frameworks. As a result, latent vulnerabilities are often identified only after commissioning—when technical and financial flexibility is limited due to high CAPEX, long lead times, and contractual constraints.
How Safety-Critical Risks Scale with Electrolyser Size:
Laboratory, pilot, or containerised systems frequently underrepresent the challenges encountered at MW scale. In industrial alkaline electrolysers, failure modes intensify due to:
