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I agree Ray. Implying that a battery system is useless as it could only "Run the state" for a short period would be very misleading. Solar with battery storage may be a long term plan for individual households but it would never be the intent at a grid level.
Battery storage provides an instant buffer to allow the spin up of still relatively quick reacting alternatives, like pumped hydro, which can not be switched on instantly but can certainly be spun up in a matter of minutes. Otherwise as you said. It provides a buffer to allow for planned reactions to extraordinary events like the towers blowing over, in that situation, load shedding is still the most likely outcome but at least battery storage would allow time to do it instead of the whole system collapsing over a matter of seconds.
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