The Electricity Statement of Opportunities is the document that decides whether anyone is made to do anything about reliability. Each year AEMO forecasts supply against demand across the National Electricity Market for ten years, and where it finds a gap in the one-year-out or three-year-out window it must ask the Australian Energy Regulator to consider making a reliability instrument under the Retailer Reliability Obligation. That instrument is what obliges retailers to contract for enough capacity. No gap, no instrument, no obligation.

For this region the 2026 edition matters more than most, because it is the first one run on the Eraring date that actually applies. The Hunter's 2,880 MW station was for years modelled to close in 2025; it is now listed for April 2029, and AEMO names the the extension of Eraring Power Station to April 2029 among the reasons the near-term outlook improved.

What the ESOO actually finds

Under the RRO framework the 2026 assessment reports no reliability gaps in 2027-28; no T-1 reliability instruments are requested, and the same for 2029-30 at the T-3 timing. On the face of it, the closure of the largest power station in the country has been absorbed.

That is genuinely the finding, and we are not going to dress it as a crisis. But AEMO qualifies it in the same section, in unusually direct language for a planning document.

The 26 GW doing the work

The reliability assessment used for RRO purposes included about 26 GW of anticipated projects. Anticipated is a defined status, and AEMO explains what it costs: By definition, these projects have reached fewer delivery milestones than committed projects and are therefore exposed to greater risk of delay or non-delivery.

Then the sentence that should be quoted in every Hunter energy discussion for the next three years. Anticipated developments play a significant role in this outcome. And:

If they had been excluded from the reliability assessment for RRO purposes, T-3 reliability instruments would have been requested in Queensland and New South Wales for 2029-30, following the closure of Gladstone and Eraring power stations.

So the answer to "does the grid cope with Eraring closing" is not simply yes. It is yes if roughly 26 GW of projects that have not yet cleared the committed bar are delivered on time. Strip them out and New South Wales is a region that would have triggered an intervention.

The part that is structural, not just cautionary

The Retailer Reliability Obligation has two triggers by design: an assessment at the T-3 timing, and one at T-1 that exists to catch the case where the three-year picture did not eventuate. AEMO records that the second door is now shut for that year:

Under the RRO framework, because a T-3 reliability instrument will not be requested, there will be no opportunity to subsequently request a T-1 instrument for 2029-30 if anticipated developments do not proceed as expected.

Read that against the risk AEMO has just described. The projects carrying the no-gap result are the ones most exposed to delay, and the mechanism that would ordinarily catch a delay closer to the date cannot be used for the year in which Eraring closes. If delivery slips, the remaining tools are operational rather than contractual: AEMO notes that measures such as the Reliability and Emergency Reserve Trader may need to be relied on.

Our view, labelled as such. This is not a prediction that the lights go out, and nothing in the ESOO supports one. It is a point about where the risk now sits. The RRO was built so that a forecast made at T-3 could be corrected at T-1. For 2029-30 that correction is unavailable, and the reason it is unavailable is the same favourable forecast that makes the year look safe. That is a reasonable design outcome and it is also worth a Hunter reader knowing, because this is the year the region's largest employer of grid capacity comes off the system.

Where the gaps do appear

Further out, the ESOO does identify forecast reliability gaps against the reliability standard in its Committed and Anticipated Developments assessment. New South Wales and Victoria appear from 2030-31, South Australia from 2031-32, Queensland from 2032-33 and Tasmania from 2033-34. Those sit beyond the RRO trigger windows in this edition, so they generate no instrument now; they are the reason the document is a ten-year outlook rather than a three-year one.

AEMO also states the condition that underwrites the whole period, and it is one this region supplies: Maintaining reliability through this transition will also depend on existing ageing coal-fired generators remaining available and operating reliably until their announced retirement dates. Eraring is on that list until April 2029.

How we did this

Every quotation and figure comes from the 2026 Electricity Statement of Opportunities for the National Electricity Market, dated August 2026, which we downloaded and read directly. aemo.com.au's web pages sit behind a bot-verification interstitial that we did not attempt to pass; the report PDF is served on a direct request, which is how our watch-table records fetching it, and is what we used. We confirmed the file is the 2026 edition and not a cached earlier one before quoting it.

The reliability-gap years, the 26 GW figure, the T-3 and T-1 statements and the ageing coal condition are AEMO's. The observation that the closed T-1 door and the favourable forecast have the same cause is ours, and is labelled above. We have not asked AEMO anything; this is a reading of a published document.

Sources

  1. AEMO, 2026 Electricity Statement of Opportunities for the National Electricity Market (PDF, August 2026, downloaded and read 28 August 2026): the no-gap findings at T-1 2027-28 and T-3 2029-30; the approximately 26 GW of anticipated projects and their defined delivery risk; that excluding them would have produced T-3 instruments in Queensland and New South Wales for 2029-30 following the closure of Gladstone and Eraring; that no T-1 instrument can subsequently be requested for 2029-30; the extension of Eraring to April 2029 among the drivers of the improved outlook; the reliability gaps from 2030-31 in New South Wales and Victoria, 2031-32 South Australia, 2032-33 Queensland and 2033-34 Tasmania; and the dependence on ageing coal-fired generators operating reliably until their announced retirement dates.
  2. AEMO, 2025 Electricity Statement of Opportunities (PDF, downloaded 28 August 2026): held alongside the 2026 edition to confirm the two documents are distinct rather than a cached file, since their sizes are similar.

See something we got wrong? Tell us and we will check it against the report and log the outcome.