You're not understanding that correctly. They are talking about things like https://en.wikipedia.org/wiki/Hornsdale_Power_Reserve https://en.wikipedia.org/wiki/

You're not understanding that correctly. They are talking about things like https://en.wikipedia.org/wiki/Hornsdale_Power_Reserve https://en.wikipedia.org/wiki/Hornsdale_Power_Reserve This giant (world's largest!) and very expensive thing provides short term-relief against grid outages. The batteries last for ~1 hour and it can still only provide electricity for something like 50k homes. (It's used for more economically useful things, like stabilizing the grid in emergencies.) The periods between high and low/zero wind are in the order of 200-300 hours (at least where I live).