Green Hydrogen Electrolyzer Turndown & Crossover (2D)

Green hydrogen plants don't run at a constant, comfortable current — they're throttled up and down all day to soak up whatever a wind or solar farm happens to produce. This 2D cross-section simulator applies Faraday's law to a single electrolyzer cell in real time, comparing a PEM stack against an alkaline stack as you drag the load down toward the renewable source's minimum output. Because hydrogen crossover through the membrane is driven mainly by a fixed concentration gradient rather than by current, throttling down concentrates it: the H₂ fraction contaminating the oxygen stream climbs until it breaches the 2% industrial safety threshold — watch it happen live on the turndown curve below the chamber view, which reveals the real turndown ratio that forces plant operators to add battery or hydrogen buffering rather than coupling the electrolyzer directly to a fluctuating supply.