Fraction of negative hourly wholesale electricity prices in selected regions, 2019-2025

Last updated 11 Feb 2026

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Sources

IEA (2025), Real-Time Electricity Tracker.

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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