Green Hydrogen Electrolyzer Turndown & Crossover

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 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, revealing the real turndown ratio that forces plant operators to add battery or hydrogen buffering rather than coupling the electrolyzer directly to a fluctuating supply.