Tasmania experienced high renewable penetration of 87.1% on 8 August 2026 in the early morning period, with hydro and wind generation collectively dominating the fuel mix whilst gas OCGT provided supplementary capacity. Regional spot prices remained generally low, with one settlement interval at 06:20 dropping to $0.08/MWh, consistent with high renewable supply conditions.
The high renewable penetration was driven by substantial hydro generation (averaging ~586 MW across the period) combined with wind output (averaging ~120 MW), which together met the majority of regional demand. The binding constraint F_TASCAP_RREG_0220 remained active throughout with marginal values ranging from $7.50 to $8.99/MWh, indicating transmission or constraint limits were limiting additional renewable export or dispatch, which likely suppressed regional prices despite abundant renewable availability.
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.