South Australia’s giant battery is already showing its worth, state Energy Minister Tom Koutsantonis says. The world’s largest lithium-ion battery, built by tech billionaire Elon Musk, responded quickly last week when the coal-fired Loy Yang power plant tripped and went offline. The battery delivered 100 megawatts into the national electricity grid in 140 milliseconds. Emergency generators would take us 10 to 15 minutes to get fired up and operating.

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