"The world's biggest lithium-ion battery — built by tech billionaire Elon Musk's company Tesla last year — has survived its first summer in South Australia's mid-north."

"And according to a new report by the Australian Energy Market Operator (AEMO), it's outperforming coal and gas generators on some key measures."

"AEMO says the Hornsdale Power Reserve is capable of charging at a rate of 80 megawatts and discharging at 100 megawatts."

"It has a storage capacity of 129 megawatt hours."

"That means it could operate for about 75 minutes at full capacity."