Tasmania's grid achieved 100% renewable penetration during the early evening of 13 May 2026, driven entirely by hydro and wind generation with no gas-fired output recorded. Generation was approximately 1,050–1,065 MW in aggregate across the interval, with hydro contributing the majority (~850–870 MW) and wind providing the remainder (~175–200 MW). Wholesale prices remained stable and unremarkable at $96.24/MWh throughout the observed period.
Tasmania's predominantly hydro-based generation fleet makes 100% renewable penetration a relatively routine occurrence, particularly when wind output is healthy and demand does not require peaking gas support. The consistently binding F_T+RREG_0050 constraint (raising raise regulation FCAS requirements on the Tasmanian network) with a marginal value of $4.29 suggests there is some tightness in frequency regulation headroom, likely reflecting the absence of synchronous gas generation that would otherwise contribute inertia and regulation services. The flat and moderate energy price of $96.24/MWh indicates that supply and demand were well-balanced, with no significant export pressure via Basslink or unexpected demand spikes influencing the spot price.
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.