June 2025 caused a strong finish to the financial year with extreme volatility across the NEM, although QLD’s impact was tempered by interconnector constraints. Power plant outages were a big driver on spot price outcomes. Gas prices were also elevated during critical days.

1.0 Highlights
This section summarises the key spot market outcomes for the month which delivered a dramatic surge in electricity spot prices, also pulling up gas spot prices to elevated levels. Generator outages, particularly in Victoria, had a profound impact on electricity spot prices and Capacity-at-Risk shows some market players were comfortable with extreme prices, and others not so.