Fraction of negative hourly wholesale electricity prices in selected regions in the first half of the year, 2019-2025 

Last updated 23 Jul 2025

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Sources

IEA (2025), Real-Time Electricity Tracker (data explorer).

Notes

Southern California corresponds to area SP15 in the state's zonal regions, Central California to area ZP26 and Northern California to area NP15. For South Australia and Victoria, five-minute interval prices were converted to hourly averages to enable comparison.

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