- May 21, 2019 6:22 pm GMT
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A combination of strong output from the state’s wind farms and its growing solar resources, coupled with low demand, pushed wholesale electricity prices in South Australia into negative territory for nearly six hours on Tuesday and for more half-hour intervals on Wednesday.
The major negative pricing event came as the combination of large scale wind and utility-scale solar, along with the output from the 1GW of rooftop solar, contributed more than 85 percent of the state’s generation for the whole period of negative pricing on Tuesday.
For most of the time, the output from wind and solar covered more than 100 percent of demand, which – being a mild, Autumn day – was relatively low.