How close are we to hydrogen that's cheap and clean?Can clean hydrogen get cheap enough to matter?
or, simply: Can clean hydrogen get cheap enough to matter?or, precisely: How close are we to hydrogen that's cheap and clean?
Electrolysis works; the open question is whether clean hydrogen can reach a few dollars a kilogram and scale to industrial volumes.Clean hydrogen could fuel steel, ships, and fertilizer. First it has to get cheap - and get built at scale.
Low-emissions share stays tiny - Installed electrolysis passed 4 GW, but low-emissions hydrogen was still about 1 Mt of more than 100 Mt demand. Next up - NEOM targets first ammonia (expected 2027).
State of playWhere clean hydrogen stands right now
The current stage, the honest metric, and the single threshold that gates the next stage. Each threshold is a falsifiable claim with a named next test.How far up the ladder we've climbed, the honest verdict, and the one thing blocking the next step.
Clean hydrogen could fuel steel, ships, and fertilizer. First it has to get cheap - and get built at scale.Electrolysis works; the open question is whether clean hydrogen can reach a few dollars a kilogram and scale to industrial volumes.
Build the first 10 GWTen-gigawatt installed base Next test: IEA's next annual inventory can test whether the more than 2.5 GW under construction for 2026 actually enters service.
The thresholds that gate the next stageWhat has to happen next
Each threshold is a falsifiable claim with a named next test; the gap chart shows how far today's metric sits from the goal.Each row is one thing that has to be proven — and how far today's number is from the target.
The record behind the verdict
Major events set large; context events set small but never hidden. Everything below the TODAY rule is a schedule, not a result.
Finding and Splitting Hydrogen
Finding and Splitting Hydrogen begins with water split electrically. The result established the next question for the field.
Fertilizer Makes Hydrogen Industrial
Fertilizer Makes Hydrogen Industrial moved the field from synthetic ammonia industrialized to vemork electrolysis opens. The results narrowed the next question without closing it.
Fuel-Cell Promises Meet Reality
Fuel-Cell Promises Meet Reality begins with hydrogen initiative launched. The result established the next question for the field.
Scaling Under Carbon Rules
Scaling Under Carbon Rules moved the field from europe sets electrolyzer targets to eu targets ten million tonnes. The results narrowed the next question without closing it.
Events outside the declared eras
Events outside the declared eras begins with hydrogen shot dollar goal. The result established the next question for the field.
Why the meters read the way they do
The learning curves and comparisons that justify each threshold's percentage. Every series is measured, with the source event linked in the timeline above.
Read the evidence more closely
Definitions, system boundaries and experimental caveats behind the headline record.
01Electricity sets a hard cost floor
DOE's representative PEM model starts at 55.2 kWh/kg H₂ and averages 57.5 kWh/kg over a 40,000-hour stack life as voltage degrades. Even electricity at $0.03/kWh therefore contributes roughly $1.66-1.73/kg before electrolyser capital cost, financing, water, compression or storage.
02PEM targets must be met together
DOE's 2026 PEM targets-51 kWh/kg system consumption, 80,000-hour life and $250/kW uninstalled system cost-must be achieved together at relevant scale; meeting one laboratory target does not demonstrate $2/kg hydrogen.
03Electricity provenance determines emissions
Electricity provenance dominates electrolytic hydrogen's carbon intensity. US 45V accounting therefore requires incrementality, regional deliverability and, from 2030, hourly matching; the statutory eligibility ceiling is 4 kgCO₂e/kg H₂.
04Green hydrogen still has lifecycle emissions
Green hydrogen is not literally zero-emission on a full lifecycle basis. A 2024 Nature Energy assessment of 1,025 planned facilities found 2.9 kgCO₂e/kg H₂ median emissions even in its most optimistic configuration; 1,000 km transport added approximately 1.5 kg by pipeline or 1.8 kg by liquid-hydrogen shipping.
05Water matters locally more than it costs
DOE estimates electrolysis can consume about 3.8 US gallons, or 14.4 litres, of water per kilogram of hydrogen including treatment assumptions. Desalination adds only an estimated $0.01-0.04/kg, so local water availability and discharge management matter more than desalination's direct cost.
06Factory capacity overstates actual output
Global electrolyser manufacturing capacity reached 25 GW/year in 2023, but actual output was only 2.5 GW. Manufacturing announcements therefore overstate near-term equipment supply.
07Installed systems cost more than stacks
Installed cost, not stack price, is the meaningful comparison. In 2024 the IEA estimated $600-1,200/kW for Chinese-made-and-installed systems versus $2,000-2,600/kW outside China; shipping, tariffs and adaptation raised Chinese equipment installed abroad to $1,500-2,400/kW, while engineering, procurement and construction plus contingency represented more than half of total investment.
08Demand is tighter than equipment supply
New offtake agreements fell from 2.4 Mt/year in 2023 to 1.7 Mt/year in 2024, and firm contracts remain concentrated in existing refinery, chemical and shipping uses. Demand is therefore more binding than equipment supply.
If the remaining tests pass
Downstream capabilities, drawn dashed because they depend on results not yet in.
Who is building it-and what the money saysCapital, institutions and the global race
The teams doing the work, where they are based, and whether the money points to real delivery or only a plan.Company finance, public programmes, institutional leadership and market evidence-kept separate from valuations, forecasts and announced capacity.
Electrolyser manufacturing is scaling faster than firm demand. China leads installed and manufacturing capacity; Europe, the United States and Saudi Arabia are using different combinations of subsidy, tax credit and project finance to turn low-emissions hydrogen into bankable industrial supply.
Who is building itCompanies, laboratories and programmes
Electric Hydrogen
United StatesManufactures large alkaline electrolyser systems for industrial hydrogen projects.
Sunfire
GermanyManufactures pressurised alkaline and solid-oxide electrolysers for industrial customers.
Stegra
SwedenBuilds an integrated renewable-hydrogen, direct-reduced-iron and steel project in Boden.
| Player | Country | What they are doing | Funding | Named investors | Source |
|---|---|---|---|---|---|
| Electric Hydrogencompany | United States | Manufactures large alkaline electrolyser systems for industrial hydrogen projects. Later credit, equipment-finance, grant and tax-credit support is separate from this equity round. | October 2023 Series C: $380 million | Fortescue · Fifth Wall · Energy Impact Partners · bp Ventures · Oman Investment Authority · Temasek · Microsoft Climate Innovation Fund | Source · eh2.com |
| Sunfirecompany | Germany | Manufactures pressurised alkaline and solid-oxide electrolysers for industrial customers. Sunfire separately announced up to €100 million of EIB debt and access to about €200 million of approved grants. | March 2024 Series E equity: €215 million | LGT · GIC · Ahren Innovation Capital · Carbon Equity · Lightrock · Carbon Direct | Source · backend.sunfire.de |
| Stegracompany | Sweden | Builds an integrated renewable-hydrogen, direct-reduced-iron and steel project in Boden. The debt is project finance; a separate €250 million EU Innovation Fund grant is not equity. | January 2024 project financing: €4.2 billion debt; equity raised reached €2.1 billion | Microsoft Climate Innovation Fund · Mubea · Siemens Financial Services · IMAS Foundation · Just Climate | Source · stegra.com |
| NEOM Green Hydrogen Companycompany | Saudi Arabia | Builds an integrated renewable hydrogen and ammonia export project. The plant's 600 tonnes/day hydrogen figure is design capacity, not achieved production. | May 2023 financial close: $8.4 billion total investment, including $6.1 billion non-recourse project finance | ACWA Power · Air Products · NEOM · 23 lending institutions | Source · neom.com |
Where every number comes from
10 sources — every figure on this page traces to one.
- IEA Global Hydrogen Review 2026 - Executive summaryiea.org
- IEA Global Hydrogen Review 2026 - Productioniea.org
- IEA Global Hydrogen Review 2025 - Executive summaryiea.org
- IEA Global Hydrogen Review 2024 - Hydrogen productioniea.org
- DOE Energy Earthshots Initiative Reportenergy.gov
- DOE PEM Electrolysis Production Cost Assessmenthydrogen.energy.gov
- US National Clean Hydrogen Strategy and Roadmaphydrogen.energy.gov
- IRS final clean hydrogen production-credit regulationsirs.gov
- European Commission 2020 hydrogen strategyknowledge4policy.ec.europa.eu
- NEOM Green Hydrogen Company construction updatenghc.com