South Australia (SA1) experienced high renewable penetration of 85.2% on 24 May 2026, driven predominantly by wind generation of 1,417 MW representing the bulk of the generation mix. Whilst renewable penetration remained elevated, real-time prices exhibited volatility across the 25-minute period (ranging from $26.79/MWh to $72.44/MWh), suggesting operational challenges in managing the variable output.
The high renewable penetration was primarily driven by strong wind generation (1,417 MW) coinciding with zero solar output during the evening period. Multiple binding constraints on the main and transfer branches (F_MAIN+RREG_0220 and F_T+RREG_0050) with marginal values of $5–$10/MWh indicate network congestion limitations, requiring dispatch of higher-cost gas generation (146–170 MW OCGT and 101 MW CCGT) to manage flows, which contributed to price volatility despite the abundance of renewable generation.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.