WA1 (WEM) experienced a price spike to $252.35/MWh during the 10:10 interval on 6 July 2026, representing a sharp 55-dollar jump from the previous interval and a sustained elevation above $190/MWh over the preceding 15 minutes. The spike occurred across a single trading interval within an otherwise volatile pricing period.
Multiple binding constraints with non-trivial marginal values (F_TASCAP_RREG_0220 and F_S+TBTU_L1 ranging from $4.90–$4.97/MWh) were active during the spike, indicating network or reserve limitations constrained the market at this time. The generation mix shows substantial reliance on gas-fired capacity (1,250 MW combined OCGT and CCGT) alongside significant battery discharge (440 MW), suggesting tight supply conditions or rapid demand response that elevated marginal pricing when constraint-binding conditions activated.
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.