South Australia (SA1) experienced very high renewable penetration of 93.5% on 10 July 2026 at 14:00–14:30, driven predominantly by wind generation of 1,119.83 MW supplemented by battery output. Regional reference prices (RRP) remained moderate, ranging from $37.44 to $52.54/MWh across the five-minute settlement intervals.
The high renewable penetration reflects substantial wind generation that dominated the generation mix, with minimal gas-fired generation (40–81 MW across OCGT units) and zero solar output during the afternoon period. Price moderation despite high renewables was likely supported by binding constraint F_T+NIL_ML_RECL_L6 with a marginal value of $101.12/MWh, which suggests an active constraint was limiting interconnector flows or regional flows, preventing prices from falling as sharply as they would with unconstrained dispatch of the abundant wind supply.
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.