The International Journal on Hydropower & Dams, March 2021
Energiasalv is set to develop the world’s first underground pumped hydro plant in northwest Estonia; the technology has been studied in the Netherlands and the USA, but not implemented. The 500 MW Underground Pumped Hydro (UPH) project, with an initial storage capacity of 6 GWh over 12 hours, is planned to be commissioned by the end of 2028. Martin Burdett interviewed the CEO of Energiasalv, Peep Siitam about the project, which is predicated on a unique hybrid business model combining granite mining and power storage services.
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