Guest author Franz David Schaefer compares winter 2025 and 2026 bidding across the NEM’s battery fleet: capacity rotated out of spike capture into the competitive band, while incumbent revenue fell from $85.4m to $13.2m.
As the next step in exploring details of what happened in South Australia on Sunday 21st and Monday 22nd June 2026, we take a closer look at battery operations.
In this instalment of our annual review of the NEM’s expanding battery fleet, we draw on the GSD2025 to look at long-term trends in market revenue, high-price capture, the early returns of FPP, and network curtailment.
Today we’ve released the Generator Statistical Digest 2025 — the latest edition of our annual, unit-level reference report on generator performance across the NEM.
A quick look into those LOR forecasts for South Australia next Monday, including a view of forecasts for market demand, wind and solar conditions, and generator outages.
Elon Musk's '100 days or it's free' offer was made almost exactly 7 years ago - how much longer or shorter have battery development delivery times changed since then?
A review of battery storage market performance in the NEM throughout 2023, a year in which where we saw the battery fleet double in size.
Here's a snapshot of the ‘Unit Dashboard’ widget in ez2view of the HPRG1 unit (i.e. the pre-IESS generation side DUID for the Hornsdale Power Reserve) on Monday 13th December 2021
Two brief (but important) observations made possible with a chart published on RenewEconomy with respect to the Hornsdale Power Reserve.
Guest author, David Leitch, in his first article here on WattClarity, walks through some of what first jumps out to him in his initial review of the Generator Statistical Digest 2019.
Guest author, Ben Willacy, takes a first look at the Generator Statistical Digest 2019 and highlights a few initial observations relating to the performance of wind, solar and storage in this energy transition.
Last minute complications mean that I cannot speak at today's "Queensland Smart Energy Summit" (with Jonathon Dyson being an even better substitute). Here are some of the observations I would have liked to discuss with the audience there...
Understanding the FCAS response by all generators when a unit trips in the NEM. A detailed look at the Loy Yang A unit trip in December 2017 and the contribution of the Hornsdale Power Reserve.
Hornsdale Power Reserve a.k.a "World's biggest battery" achieves new milestones - discharged at a rate of 100MW and charged continuously for nearly 3 hours.
It's 1st December 2017 - the first day of summer, and also the promised delivery date for the "world's largest battery". In this updated post we look at how it's been operating.
It's Saturday 25th November 2017 and what is currently known as "the worlds biggest battery" has kicked into gear - charging for a couple hours this morning.
Some quick thoughts about Tesla's promise to "fix South Australia's power woes". Which specific problem is Tesla promising to fix?