alt Hacker NewsFor comparison with a gravitational battery, Dinorwig pumped hydro in north Wales has a max power output of 1.7 GW and storage of 9.1 GWh.
For comparison with a gravitational battery, Dinorwig pumped hydro in north Wales has a max power output of 1.7 GW and storage of 9.1 GWh.
About 10-15 percentage points less efficient because of losses pumping the water uphill though, and slower to react (seconds vs milliseconds) which will probably force it out of the fast frequency response market which batteries have rapidly saturated.