South Australia (SA1) experienced high renewable penetration of 92.7% during the midday period of 11 June 2026, driven predominantly by wind generation of 1,219 MW with minimal solar contribution. Regional electricity prices exhibited significant volatility during this period, ranging from $1.14/MWh to $60.08/MWh across consecutive 5-minute settlements.
The high renewable penetration reflects substantial wind generation output combined with battery storage injection of 117 MW, displacing conventional thermal generation and resulting in notably depressed prices during lower-constraint periods (particularly the $1.14/MWh settlement at 12:55). Price spikes observed at 12:50 and 13:05 coincided with binding constraints including F_MAIN+RREG_0220 (marginal value $7.08) and F_T+RREG_0050 (marginal value $4.32), suggesting transmission or regional regulation constraints limited the dispatch of lower-cost renewable generation and required more expensive generation sources at those settlement intervals.
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.