Tasmania (TAS1) experienced 100% renewable energy penetration on 6 July 2026 during the evening period, with prices rising from $92.23/MWh to $107.33/MWh between 20:05 and 20:30, before declining to $89.19/MWh at 20:35. The generation mix was dominated by hydro output (1,291–1,667 MW) supplemented by wind generation (59–64 MW), with no thermal generation required.
Price elevation during the high renewable period was driven by multiple binding constraints with marginal values ranging from $4.90/MWh to $7.78/MWh, indicating transmission or system security limits were active. The sustained high renewable output created supply-side conditions that, combined with these constraint limitations, supported elevated pricing through the 20:05–20:30 window; the subsequent price drop to $89.19/MWh at 20:35 suggests either constraint relief or a shift in system conditions.
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.