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Dutch startup Ocean Grazer’s Ocean Battery® (2024) harnesses deep-sea pressure for grid storage:
Water depth compression (500 bar) triples energy density
Saltwater electrolyte flows through concrete reservoirs
Hydrogen co-generation via reverse electrolysis
North Sea pilot results:
▶️ 92% round-trip efficiency (vs. 75% terrestrial flow batteries)
▶️ $68/kWh system cost
▶️ Marine ecosystem enhancement: Artificial reefs formed
"Ocean pressure is our free performance booster," states CEO Frits Bliek. Siemens invests $200M for 500 MW global deployment.
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