Hydro solution to energy storage, page-7

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    SE
    SE Qld has had Splityard Creek pumped storage system since 1980. It has power output of 500Megawatts for about 10 hours (so nearly 5Gigawatt.hours capacity) and all-round cycle efficiency of about 85% (from memory).
    refer below:
    https://en.wikipedia.org/wiki/Splityard_Creek_Dam
 
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