Buy an electrolyser stack and what you actually have is wet, low-pressure, impure gas. Turning that into hydrogen a refinery, a fuel-cell fleet or an industrial customer will actually accept \u2014 99.999% pure, dry, compressed, safely stored, and made from a renewable supply that comes and goes with the sun or the wind \u2014 is a different job entirely. That job, the balance of plant, is roughly eighty per cent of the engineering work in a hydrogen plant, and it’s exactly what Neometrix builds: a turnkey green hydrogen generation plant wrapped around a bought-in MW-scale electrolyser, engineered to ISO 22734.<\/p>\n
An electrolyser stack splits water into hydrogen and oxygen \u2014 that’s the chemistry, and it’s well understood. What’s hard is everything downstream and upstream of that stack: converting renewable power into DC the stack can use, treating the feed water, purifying and drying the output gas, compressing it, storing it safely, and running the whole thing through hazardous-area safety systems that treat hydrogen with the respect its physical properties demand. Neometrix delivers that balance of plant and the EPC \u2014 rectifier and load-following, water treatment, gas purification and drying, compression, storage, hydrogen safety and controls \u2014 and integrates a bought-in electrolyser stack. The company engineers plants; it does not manufacture electrolyser stacks, and says so plainly.<\/p>\n
A solar or wind-coupled electrolyser doesn’t see steady, predictable power \u2014 it sees a ramping, variable input that changes with cloud cover and wind speed. The transformer-rectifier, controls and buffering all have to load-follow that variability without harming the stack or losing gas purity. That single requirement \u2014 following renewable power honestly instead of assuming grid-steady input \u2014 is the difference between a real green hydrogen plant and a grid-fed grey one wearing a green label.<\/p>\n
Feed water is deionised before it reaches the stack, because impurities in the water poison the electrolyser \u2014 roughly 9 litres of DI water go in per kilogram of hydrogen produced. On the output side, gas separation, de-oxygenation and drying bring the hydrogen to 99.999% purity (five nines) at a low dew point. Water treatment and drying bracket the stack on either side, and both matter as much as the electrolyser itself for the plant to deliver gas anyone can actually use.<\/p>\n
It’s the smallest molecule that exists, it has the widest flammability range of any common gas, and its flame is nearly invisible in daylight. That combination is why leak detection, ATEX hazardous-area design, nitrogen purging and a full safety case aren’t optional line items \u2014 they’re foundational to the plant design from the first drawing, engineered to ISO 22734, NFPA 2 and PESO\/IS practice.<\/p>\n
Compression, storage, purification, high-pressure gas handling, hazardous-area safety and controls are already Neometrix product lines in their own right, built for other industrial applications. A green hydrogen plant is essentially those existing competences assembled around an electrolyser stack \u2014 which is exactly why the plant, not the stack, is the part Neometrix owns and engineers.<\/p>\n
Where a tender calls for build-own-operate, ownership and long-term operation are handled together with a developer or O&M partner. Neometrix’s own role stays as the engineering, supply and commissioning company \u2014 an EPC and equipment specialist, not a hydrogen independent power producer \u2014 and the company scopes projects accordingly rather than overreaching into operating models it doesn’t run.<\/p>\n