Round-trip energy efficiency is reported to be > 80% for pumped-hydro energy sto...

		binarypaean on Feb 2, 2016 \| parent \| context \| favorite \| on: Oil Crash is Kicking Off One of the Largest Wealth... Round-trip energy efficiency is reported to be > 80% for pumped-hydro energy storage. Ecological, space, and financial efficiency are more variable. http://energystorage.org/energy-storage/technologies/pumped-...