Tasmania experienced high renewable penetration of 90.51% on 9 August 2026 between 06:00 and 06:40 UTC, driven primarily by substantial hydroelectric generation (771–1029 MW) and wind output (158–180 MW) with minimal thermal support. Spot prices exhibited volatility during this period, ranging from $20.18/MWh to $85.45/MWh across the five-minute settlement intervals.
The high renewable penetration reflects abundant hydroelectric availability combined with moderate wind generation, enabling displacement of thermal generation to only 124 MW of gas-fired capacity. Price volatility despite low marginal costs suggests that several binding constraints with marginal values between $5.47 and $9.09/MWh were active during dispatch, indicating network or system strength limitations rather than energy scarcity were constraining the market and elevating prices above renewable marginal cost.
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.