Sperra and Fraunhofer to expand 3D printed subsea energy generators with new funding

Californian Renewable energy firm Sperra has received funding from the US and German governments to advance its 3D printed subsea pumped storage hydropower (SPSH) technology.  The company’s 3D printed concrete spheres sit on the sea floor and generate electricity by pumping water to power a turbine. The resulting energy can be stored underwater near cities […]