In mid-to-late October 2025, Waratah BESS experienced what’s been described as a ‘Catastrophic Failure’ of one of its three station transformers.
This appears to have been during, or shortly afterwards, Hold Point 5 testing during which the unit was operating at full load.
However it was only on Friday 7th November 2025 that we became aware that something significant had happened:
1) Via changes in MT PASA DUID Availability data
2) Which prompted us to write ‘What’s up with Waratah BESS (unplanned outage till 3rd May 2026)?’.
Since that time, there have been a number of articles written (here, and also elsewhere). Articles relating to this written here are collated together in this category.
Identifying 5 distinct time periods (from 26th Sept 2025 to 21st Nov 2025) with Waratah BESS, we take ez2view and some external references to try to piece together sequence of events in 3 of...
On Friday afternoon we asked the question ‘What’s up with Waratah BESS (unplanned outage till 3rd May 2026)?’. It was great to see (on Monday evening) Angela MacDonald-Smith answer some of these questions in...
Another in the series about Waratah BESS, we have a look at the unit's bids and operations over a 20-day time-range to midnight ending Saturday 8th November 2025.
In the next in the series about Waratah BESS, we have a look at a 9-day time-range to midnight ending Saturday 18th October 2025 via the ‘Bids & Offers’ widget in ez2view.
Relevant to today's questions, we belatedly note now that it was back on Friday 29th August 2025 that the AER published its PASA Compliance Bulletin and Checklist.
Almost exactly 3 months ago we posted a ~12 month chronological record of the history of Waratah BESS. Due to observations today (and questions and conversations leading from them) it was worthwhile to update...
Today we see that, for the WTAHB1 unit in the MT PASA DUID Availability data set, there's now an unplanned outage for Waratah BESS extending well off the page.