Tasmania's TAS1 region achieved 100% renewable energy penetration on 22 May 2026 evening, with hydro and wind generation completely supplying the region whilst gas peaking plant remained offline. Prices remained relatively stable around $97/MWh for most of the period, with minor spikes to $101.65 and $106.16/MWh occurring in isolated five-minute intervals.
The 100% renewable penetration was driven by strong hydro generation (925–951 MW across multiple intervals) combined with moderate wind output (138–208 MW), providing sufficient capacity to meet demand without thermal generation. The binding transmission constraints on the main Tasmanian feeders (F_MAIN+RREG_0220) and Tasmanian interconnector routes (F_T+RREG_0050) likely caused the isolated price spikes, as network limitations forced the market to marginal pricing rather than fuel cost dispatch, despite abundant renewable generation being available.
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.