Underground Sun Conversion
Underground Sun Conversion is a hydrogen project in Upper Austria, Austria using microbiological methanation / geo-methanation.
Overview
Statusfinal report available (status October 2023)
Country · regionAustria · Upper Austria
Technologymicrobiological methanation / geo-methanation
Productgeomethane / methane (CH4)
Capacity0.5 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
Componentsrenewable hydrogen (H2), carbon dioxide (CO2), porous underground gas reservoir, microorganisms/archaea
Feedstockrenewable hydrogen (H2), carbon dioxide (CO2)
Final Userenewable natural gas withdrawn as needed and transported via existing grids
Power Sourcesolar or wind energy
Project Typeresearch project
Status & timeline
Lifecycle Stageresearch project; laboratory experiments, simulations, and scientific field test
Timeline
No recorded project events.
Sources & record history
Sources
- RAG Austria AG USC-FlexStore press release Shared by 2 fields: Current
- energy-innovation-austria Underground.SUN.Conversion Shared by 6 fields: Current
- MDPI / Energies Multidisciplinary Assessment ... including Underground Sun Conversion Shared by 2 fields: Current
- OST Underground Sun Conversion - Flexible Storage | Project
- European Clean Hydrogen Partnership European Hydrogen Observatory projects Dec2025
- RAG Austria AG Underground Sun Conversion - Final report
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 | Underground Sun Conversion | View exact valueUnderground Sun Conversion | USC-FlexStore press release | — | |
| Administrative Area | Upper Austria | View exact valueUpper Austria | Underground.SUN.Conversion | — | |
| Country | Austria | View exact valueAustria | Underground.SUN.Conversion | — | |
| Components | renewable hydrogen (H2), carbon dioxide (CO2), porous underground gas reservoir, microorganisms/archaea | View exact value["renewable hydrogen (H2)","carbon dioxide (CO2)","porous underground gas reservoir","microorganisms/archaea"] | USC-FlexStore press release | — | |
| Feedstock | renewable hydrogen (H2), carbon dioxide (CO2) | View exact value["renewable hydrogen (H2)","carbon dioxide (CO2)"] | Multidisciplinary Assessment ... including Underground Sun Conversion | — | |
| Final Use | renewable natural gas withdrawn as needed and transported via existing grids | View exact valuerenewable natural gas withdrawn as needed and transported via existing grids | Underground.SUN.Conversion | — | |
| Power Source | solar or wind energy | View exact valuesolar or wind energy | Underground.SUN.Conversion | — | |
| Product | geomethane / methane (CH4) | View exact valuegeomethane / methane (CH4) | Multidisciplinary Assessment ... including Underground Sun Conversion | — | |
| Project Type | research project | View exact valueresearch project | Underground.SUN.Conversion | — | |
| Technology | microbiological methanation / geo-methanation | View exact valuemicrobiological methanation / geo-methanation | Underground Sun Conversion - Flexible Storage | Project | Current | |
| Capacity | 0.5 MW | View exact value0.5 MW | European Hydrogen Observatory projects Dec2025 Confidence: reported | Snapshot 2025-12-01 | Older value (2025) |
| Lifecycle Stage | research project; laboratory experiments, simulations, and scientific field test | View exact valueresearch project; laboratory experiments, simulations, and scientific field test | Underground.SUN.Conversion | — | |
| Progress Status | final report available (status October 2023) | View exact valuefinal report available (status October 2023) | Underground Sun Conversion - Final report | Current |
Record history
11 current sourced values · 1 older value · Record updated