The big attraction of batteries for grid support services is their superior ability to rapidly inject bursts of electricity into the grid just when it is needed. But demand for battery storage in power systems is limited and is not proving to be greater in countries furthest ahead with transitioning their electricity supply to variable sources of renewable energy .. .. Today’s 169 GW of pumped hydro electricity storage, well tried and tested, makes up 96% of the global capacity for storing electricity in grid networks and will continue to be the dominant means of grid storage for years to come, says the US Department of Energy (DOE). Of the remaining 5 GW of grid storage capacity, 1.8 GW is provided by various types of battery. ...
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