South Australia (SA1) experienced high renewable penetration of 88.4% on 15 June 2026, with wind generation supplying 1,442.88 MW and battery storage contributing 97.43 MW combined. Regional reference prices remained relatively modest, ranging from $35.60 to $58.30/MWh across the five-minute settlement intervals, with most prices clustering in the $35–41 range.
The high renewable penetration and moderate price outcomes reflect abundant wind generation during this period, which displaced higher-cost thermal generation and suppressed marginal costs. Binding constraints with low marginal values ($3.73–$4.15/MWh) indicate that network or system security limitations were only marginally restricting output rather than driving prices significantly higher, suggesting these constraints were not the primary pricing driver during this interval.
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.