Monitoring performance and analysing trends

The AER monitors the performance of wholesale electricity and gas markets and publishes data in reports such as the State of the energy market and the Wholesale markets quarterly.

On this page you can view and download individual charts and data tables from our most recent market performance reports. 

Highlights include:

Electricity Q3 2023

  • Average quarterly prices were lower than the preceding quarter across all regions. Prices ranged from $31/MWh in Tasmania to $114/MWh in South Australia.
  • South Australia was the most expensive region partly due to 8 occasions of 30-minute prices above $5,000/MWh, increasing from 5 the previous quarter.
  • South Australia (29 MW), New South Wales (4,202 MW) and Victoria (2,103 MW) reached new record minimum demands.
  • There was a record number of 30-minute negative prices (4,285) in the NEM driven by strong solar output. Most of these occurred in South Australia and Victoria.
  • New South Wales had the highest percentage of energy imports for any quarter since 2017. This was driven by increased exports from Queensland and Victoria.
  • Frequency Controlled Ancillary Services costs remained steady with one new unit registered (demand response provider) not active in the energy market.
  • Base future prices have fallen significantly across most regions for the remainder of 2023 and 2024.

Gas Q3 2023

  • Average prices were lower than the preceding quarter across all regions, ranging from $10.23/GJ in Victoria to $10.80/GJ in Adelaide.
  • Lower prices were driven by low demand, largely a result of mild weather reducing both native gas demand and GPG demand.
  • Gas flows were predominantly towards southern markets over the quarter, but reversed to start flowing more gas north from mid-September.
  • The number of trades on the Moomba to Sydney Pipeline increased significantly on the Day Ahead Auction, contributing to record Q3 trade quantities almost 10 PJ higher than Q3 2022.

Registered capacity by fuel source - regions

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Electricity
This figure shows the registered capacity by fuel source in each region, as at 30 September 2023.

Weekly volume weighted average spot prices - regions

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Electricity
Weekly volume weighted average spot prices - regions

Quarterly volume weighted average spot prices - regions

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Electricity
Quarterly volume weighted average spot prices - regions

Quarterly volume weighted average price by contribution of price bands - Victoria

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Electricity
Quarterly volume weighted average price by contribution of price bands - Victoria

Quarterly volume weighted average price by contribution of price bands - Tasmania

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Electricity
Quarterly volume weighted average price by contribution of price bands - Tasmania

Quarterly volume weighted average price by contribution of price bands - South Australia

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Electricity
This figure shows the contribution of spot price in various price bands to the quarterly volume weighted average price in South Australia for the past five years.