SA1 · NEM — 5-min dispatch intervals
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South Australia leads the National Electricity Market in renewable energy penetration, with wind and solar generation regularly supplying the majority of the state's electricity demand. The region is home to the Hornsdale Power Reserve — one of the world's largest lithium-ion battery installations — which provides grid stability and frequency control services.
SA experiences the most volatile wholesale electricity prices in the NEM, with frequent periods of negative pricing during times of high wind and solar output, and occasional extreme price spikes when renewable generation drops and the state relies on gas-fired peaking plants or imports from Victoria via the Heywood interconnector.
The South Australian market provides a glimpse of the challenges and opportunities that arise as electricity grids transition to very high levels of variable renewable generation, making it a closely watched reference point for energy market participants across Australia.