The US and German governments have approved $7.7 million in grants to advance ocean-based Renewable Energy Storage. US-based Sperra received a $4 million grant to innovate Pumped Storage Hydropower Technologies. Sperra, known for 3D-printed concrete products, will design, fabricate, and test a 10-meter, 500 kW/600 kWh energy storage unit at a depth of 500-600 meters off Southern California’s coast.
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