3H2 – Helsinki Hydrogen Hub
Overview
StatusConceptEuropean Clean Hydrogen Partnership · as of 2025
Country · regionFinlandHelen
TechnologyWater electrolysisEuropean Clean Hydrogen Partnership · as of 2025
Capacity3 MWEuropean Clean Hydrogen Partnership · as of 2025
Capacity values retain their recorded units and scope. MW, kt H₂/y and Nm³ H₂/h are different measures; this page does not convert or add them without a shared operating basis.
Details
Technology & product
Componentselectrolyser (PEM electrolysis)Helen
Project Typehydrogen production facilityHelen
Location & names
Site NameVuosaariHelen
Alias3H2 Helsinki Hydrogen HubHelen
Official Name3H2 – Helsinki Hydrogen HubHelen
Timeline
- Final investment decision (FID) : 2024-04Helen
- Construction start : 2025Helen
- Target start of operation : 2026Helen
Sources & record history
Sources
- Helen Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant)
- Helen Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant)
- H2Prism earlier record (SRC-C-P200)
- European Clean Hydrogen Partnership European Hydrogen Observatory projects Dec2025 Shared by 3 fields: Snapshot 2025-12-01 · Confidence: reported · Older value (2025)
- Helen Helen (https://www.helen.fi/en/news/2024/helen-and-vireon-enter-into-a-partnership-for-a-hydrogen-refuelling-station-at-helsinki-hydrogen-hub)
- Helen Helen (https://www.helen.fi/en/news/2026/helens-financial-statements-release-2025)
- Helen Helen (https://www.helen.fi/globalassets/tietoa-meist%C3%A4/raportit-ja-julkaisut/helen_interim_report_q1_2026.pdf)
Field sources
Shared date, confidence and value status appear once with their source above; a dash in the table refers to that source context.
| Field | Shown value | Original value | Source | Date basis | Meaning |
|---|---|---|---|---|---|
| Name | 3H2 – Helsinki Hydrogen Hub | View exact value3H2 – Helsinki Hydrogen Hub | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Site Name | Vuosaari | View exact valueVuosaari | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Alias | 3H2 Helsinki Hydrogen Hub | View exact value[{"kind":"other_spelling","name":"3H2 Helsinki Hydrogen Hub"}] | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Country | Finland | View exact valueFIN | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Official Name | 3H2 – Helsinki Hydrogen Hub | View exact value[{"lang":"en","name":"3H2 – Helsinki Hydrogen Hub","evidence":["E-01"]}] | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Components | electrolyser (PEM electrolysis) | View exact value{"kind":"electrolyser","tech":"PEM electrolysis","tech_raw":"three PEM (Proton Exchange Membrane) electrolysers","component_id":"CMP-1"} | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Project Type | hydrogen production facility | View exact valuehydrogen_production_facility | Helen (https://www.helen.fi/en/news/2024/helen-to-invest-in-helsinkis-first-green-hydrogen-production-plant); Helen (https://www.helen.fi/en/news/2024/man-energy-solutions-and-h-tec-systems-in-cooperation-with-helen-oy-to-execute-helsinki-hydrogen-plant); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Technology | Water electrolysis | View exact valueWater electrolysis | European Hydrogen Observatory projects Dec2025 | — | — |
| Capacity | 3 MW | View exact value3 MW | European Hydrogen Observatory projects Dec2025 | — | — |
| Event | Final investment decision (FID) : 2024-04 | View exact value{"date":"2024-04","tags":{"as_of":"2024-04-18","source":"Helen","evidence":["E-04"],"judged_by":"worker_review","confidence":"high","accessed_at":"2026-08-18T00:30:00Z"},"ev_type":"EV-05","event_id":"V-01","raw_date_text":"earlier in April","date_precision":"month"} | Helen (https://www.helen.fi/en/news/2024/helen-and-vireon-enter-into-a-partnership-for-a-hydrogen-refuelling-station-at-helsinki-hydrogen-hub); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Event | Construction start : 2025 | View exact value{"date":"2025","tags":{"as_of":"2025","source":"Helen financial statements release 2025","evidence":["E-05"],"judged_by":"transcription","confidence":"high","accessed_at":"2026-08-18T00:30:00Z"},"ev_type":"EV-10","event_id":"V-02","raw_date_text":"Construction of the 3H2 pilot plant for producing green hydrogen began in Vuosaari.","date_precision":"year"} | Helen (https://www.helen.fi/en/news/2026/helens-financial-statements-release-2025); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Event | Target start of operation : 2026 | View exact value{"date":"2026","tags":{"as_of":"2026-04-30","source":"Helen Q1 2026 interim report","evidence":["E-03"],"judged_by":"transcription","confidence":"high","accessed_at":"2026-08-18T00:30:00Z"},"ev_type":"EV-14","event_id":"V-03","raw_date_text":"Hydrogen production is scheduled to begin in late 2026.","date_precision":"year"} | Helen (https://www.helen.fi/globalassets/tietoa-meist%C3%A4/raportit-ja-julkaisut/helen_interim_report_q1_2026.pdf); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Progress Status | Concept | View exact valueannounced_or_planned | European Hydrogen Observatory projects Dec2025 | — | — |
Record history
0 current sourced values · 12 older values · Record updated