NEM Electricity Statement of Opportunities (ESOO)

October 2025 Update to the 2025 ESOO

On 1 October 2025, AEMO published an update to the 2025 ESOO, which updates its modelling to consider new information including changes to the closure dates of Torrens Island B and Gladstone Power Station. The October 2025 Update to the 2025 ESOO provides an updated outlook of supply adequacy.

2025 Electricity Statement of Opportunities

The Electricity Statement of Opportunities (ESOO) provides technical and market data for the National Electricity Market (NEM) over a 10-year period to inform the planning and decision-making of market participants, new investors, and jurisdictional bodies.

The NEM ESOO incorporates AEMO’s Reliability Forecast under the Retailer Reliability Obligations (RRO) and the Energy Adequacy Assessment Projection (EAAP).

To view demand forecasts per region, see:

Reliability Forecast, Guidelines and Methodologies

The Reliability Standard Implementation Guidelines describe how AEMO implements the reliability standard across its reliability processes, including the approach and assumptions in relation to the ESOO.

The ESOO and Reliability Forecast methodology document explains the types of inputs and key methodologies used to calculate expected USE outcomes and details how the reliability gap period and reliability gap are determined.

Further detail on AEMO’s Forecasting Approach is available here

2025 ESOO Model for download

AEMO publishes the ESOO PLEXOS model to assist stakeholders in using the input data and modelled outputs produced for the purpose of the 2024 Electricity Statement of Opportunities.