An independent breakdown of the main decoupled electrolysis approaches, how far each has progressed, and how three vendors compare on separation method, scale, and power connection. Decoupled water electrolysis separates hydrogen and oxygen production with a redox mediator instead of a physical membrane. Nickel hydroxide with temporal decoupling is the only decoupled approach with reported … Read more
A reference comparison of four iridium-free electrolyzer designs on materials, load range, efficiency, and scale, with the limits of the published data. Iridium oxide is the standard anode catalyst in PEM electrolyzers, and Wood Mackenzie reports annual global iridium production of about 7 tonnes, recovered as a byproduct of platinum-group metal mining. A 2026 Journal … Read more
Where variable solar and wind power loses value inside the electrolyzer, what the standard workarounds cost, and how three manufacturers compare on published specifications. Electrolytic hydrogen cost depends on the electricity price and on annual operating hours, and a plant running 2,000 hours spreads its electrolyzer capital over a quarter of the output of a … Read more
The electrolyzer best suited to direct renewable integration is the one with no gas-crossover minimum load and no wear penalty for daily stops and restarts. Alkaline, PEM and solid oxide systems each hit a different limit when fed raw solar or wind power. This guide sets out those limits, explains an alternative mechanism, and compares … Read more
Two sites make up the public deployment record for decoupled electrolysis, and this report covers their status, the technical basis, and the data that has not been published. Decoupled water electrolysis produces hydrogen and oxygen in alternating phases within one cell and uses no membrane or diaphragm. H2Pro reports a 0.5 MW pilot in the … Read more
Short answer: yes, an electrolyzer can be connected directly, DC to DC, to a solar or wind source, but a DC-DC converter with maximum power point tracking is still required. The wiring is the easy part. The real constraint is whether the electrolyzer can tolerate power that swings from zero to full output within hours. … Read more
Short answer: PEM electrolyzers handle intermittent solar and wind better than alkaline on raw response speed and minimum load, alkaline paired with batteries closes most of that gap at lower capital cost, and decoupled water electrolysis (DWE) is a newer, structurally different architecture built specifically around unlimited cycling, with commercial-scale proof still pending. This guide … Read more
A green hydrogen system that looks cheap at pilot scale stays cheap at industrial scale only if it avoids three specific failure points: a scarce catalyst metal, degradation from renewable-driven on/off cycling, and a lack of proof that satisfies project lenders. This piece breaks down each one, then compares how three named electrolyzer companies are … Read more
Cutting capital cost for a utility-scale green hydrogen plant comes down to three things working together: stack-level material and design choices, module size, and manufacturing scale, applied against the balance-of-plant equipment that usually costs more than the stack itself. No single lever gets a project to its target CAPEX alone. This guide breaks down where … Read more
Green hydrogen is not going to hit broad cost parity with grey hydrogen by 2030. The latest data points to a narrower outcome: sub-$2/kg production concentrated almost entirely in China, a wider band of $3-plus pricing in favorable regions like Australia, and most of the rest of the world still sitting above $4/kg. This page … Read more