Credit: Fraunhofer IEE The basic concept of an underwater pumped hydro storage system is not dissimilar from that of its land-based cousin. The difference is all in the details of how you make ...

Finnish clean energy company Fortum has initiated a two-year feasibility study to explore prerequisites for new pumped hydro ...

The study also focuses on techniques to determine the optimal size of renewables-based pumped hydro storage systems. Costs for hybrid solar-pumped hydro projects currently range from $0.098/kWh to ...