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operational600000 m³ 2 mentions

Germany's largest operational underground hydrogen storage project injecting green hydrogen into two 300,000m³ salt caverns at the Etzel facility in Lower Saxony. The pilot phase began in Q2 2025 with an initial 90-tonne injection using a 2% hydrogen blend in existing pipelines.

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Organizations

Plug Power
Hydrogen supply chain solutions
company USA 273 mentions
Gasunie
Gas infrastructure company involved in transmission network development.
other Netherlands 18 mentions
Storag Etzel
Underground gas and hydrogen storage
company Germany 4 mentions
Organizations
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Often mentioned with · Organizations

Gasunie
Gas infrastructure company involved in transmission network development.
other Netherlands 2 mentions
Storag Etzel
Underground gas and hydrogen storage
company Germany 2 mentions
BASF
Chemicals and materials
company Germany 1 mention
Organizations
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Often mentioned with · Technologies

Hydrogen blending
Injecting hydrogen into existing natural gas networks, allowing for a gradual transition to cleaner energy sources without immediate infrastructure overhauls.
1 mention
Hydrogen storage in salt caverns
Utilizing underground salt caverns to store large quantities of hydrogen safely, efficiently, and reliably for extended periods.
1 mention
Salt cavern storage
Underground storage in natural salt formations carved through solution mining, located 200–1,500 meters deep. These caverns provide gas-tight, pressure-sealed vaults ideal for long-term hydrogen storage.
1 mention
Technologies
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Often mentioned with · Locations

Lower Saxony
Lower Saxony
DE 2 mentions
Netherlands
Netherlands
NL 1 mention

Often mentioned with · Facilities

Etzel salt caverns
1 mention
Etzel
1 mention
Kölleda electrolyzer
1 mention
Facilities
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In the news (2)

Germany Begins First Hydrogen Salt Cavern Storage Project to Unlock Scalable Green Hydrogen
Multi-cavity hydrogen storage facility plans unveiled in Germany

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