Brief summary of outcomes (Price, Demand and IRPM) for Wednesday evening 11th June 2025

Posted by Paul McArdleThursday 12th June 2025  12:25 PM   Topic: 2025-06-11

As it was happening yesterday evening (Wednesday 11th June 2025) we posted two quick articles to highlight the volatility and low IRPM (Instantaneous Reserve Plant Margin) seen at times.

Now that we have access to a number of different ‘next day public’ data sets, we’ll start to unpick what happened … to the extent time permits.  But I thought it would be useful to start with this colour-coded tabular record of a 4-hour period (16:00 to 20:00 NEM time) as a reference point:

2025-06-11-Recapping-Volatility

 

On this table, I’ve highlighted the two dispatch intervals featured in the articles yesterday evening:

1)  Prior to the price action really ramping up, for the 17:00 dispatch interval we noted ‘Prices up in every region, on Wednesday evening 11th June 2025’.

2)  Then, after the price action was starting to wane, but IRPM dropped to it’s lowest point (for 19:15) we noted ‘High prices and tight spare supply, as NEM-wide IRPM drops down to 11.48% on Wednesday 11th June 2025’.

 

Stay tuned for more…

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About the Author

Paul McArdle
Paul was one of the founders of Global-Roam in February 2000. He is currently the CEO of the company and the principal author of WattClarity. Writing for WattClarity has become a natural extension of his work in understanding the electricity market, enabling him to lead the team in developing better software for clients. Before co-founding the company, Paul worked as a Mechanical Engineer for the Queensland Electricity Commission in the early 1990s. He also gained international experience in Japan, the United States, Canada, the UK, and Argentina as part of his ES Cornwall Memorial Scholarship.

4 Trackbacks & Pingbacks

  1. An initial walk through bidding during - WattClarity
  2. An initial review of demand response on Wednesday 11 June 2025 - WattClarity
  3. Next blast of volatility–on Thursday evening 12th June 2025 - WattClarity
  4. Brief summary of outcomes (Price, Demand, IRPM and more) for Thursday evening 12th June 2025 - WattClarity

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