2026 Integrated System Plan (ISP)

AEMO’s ISP is a roadmap for the NEM’s transition, and outlines an ‘optimal development path’ (ODP) for generation, storage and network investments to meet both consumer needs and government policies, at least cost, to 2050.

The 2026 ISP reaffirms that renewable energy, connected by transmission and distribution, firmed with storage and backed up by gas, presents the least-cost way to supply secure and reliable electricity to consumers through to 2050, as coal plants retire and while meeting government policies.

The 2026 ISP, including all appendices and associated supporting materials, is available below.

2026 Integrated System Plan (ISP) webinar

AEMO will present an overview of the 2026 ISP and host a Q&A session with the ISP team at a post-publication webinar on Tuesday, 7 July 2026 at 10am AEST.

The webinar will be recorded and published online.

Register for the 2026 Integrated System Plan (ISP) webinar

Consultation on non-network options

AEMO is calling for non-network options to meet the identified need for three newly actionable ISP projects in the 2026 ISP by Thursday, 17 September 2026. Further details on the notice of consultation and next steps are provided on the consultation page for each project.

Appendices

Supporting materials

ISP model

2026 ISP Traces

Demand Trace Component Definitions

This section provides definitions for each component included in the demand traces dataset. Electricity demand associated with the production of both domestic and export hydrogen is not included in any of the components described below, across all scenarios. Demand related to hydrogen production is modelled separately, in accordance with the methodologies and inputs outlined in the ISP Methodology and the 2025 Inputs, Assumptions and Scenarios Report (IASR). 

Component	Description
OPSO	Half-hourly regional demand traces for operational demand, defined as demand after accounting for the impact of rooftop PV and PVNSG.
OPSO_PVLITE	Contains half-hourly regional demand traces for operational demand (demand before the impact of rooftop PV and PVNSG)
OPSO_MODELLING	Version of demand used in AEMO’s market modelling.  OPSO_MODELLING = OPSO – ICL + EVVPP.
OPSO_MODELLING_PVLITE	Version of demand used in AEMO’s market modelling.  OPSO_MODELLING_PVLITE = OPSO_MODELLING+ PV_TOT
PV	Contains half hourly regional generation traces for rooftop PV
PV_TOT	Contains half hourly regional/ sub_regional generation traces for all embedded PV, including rooftop PV and PVNSG. Generation from PVNSG can be found as PV_NSG = PV_TOT – PV.
EV	Contains half hourly regional aggregate electric vehicle charging
ESS	Contains half hourly regional aggregate customer installed battery charging/discharging. ESS is capturing the net impact of battery storages (charge – discharge). To remove ESS from OPSO you would subtract it: OPSO - ESS
VTOH	Contains half hourly regional aggregate discharging from electric vehicles to homes (only used in the Step change scenario).
EVVPP	Coordinated EV charging (targeting low demand periods, helping to lift minimum demand). Not reflected in demand traces
ELECTRIFICATION_BUS	Electrification impact on the business sector
ELECTRIFICATION_RES	Electrification impact on the residential sector
ICL	Estimated interconnector losses (to allow netting off those if you are modelling interconnector losses in the market modelling).

ISP Demand Trace Data - Regional
The regional demand trace files provide half-hourly demand data for each (NEM) region, disaggregated by the demand components defined in the Demand Trace Component Definitions section above.

The dataset includes traces for both 10% and 50% probability of exceedance (POE), across 23 reference years (2003 to 2025), and for each of the three core ISP scenarios.
ISP Demand Trace Data - Sub-Regional
The sub-regional demand trace files provide half-hourly demand data for each National Electricity Market (NEM) sub-region, disaggregated by key demand components, including OPSO_MODELLING, OPSO_MODELLING_PV_LITE, and PV_TOT. 

The dataset includes traces for both 10% and 50% probability of exceedance (POE) conditions, across 23 reference years (2003 to 2025), and for each of the three core ISP scenarios.
ISP Variable Renewable Trace Data
- 25/06/2026
  2026 ISP Firm Contribution Factors
  2.06 MB

The Draft 2026 ISP, all associated draft materials including Draft 2026 ISP data files, Draft 2026 ISP demand traces, details of the consultation process, and non-confidential stakeholder submissions, are available on the 2026 ISP Consultation page. Details about consultation on the Addendum to the Draft 2026 Integrated System Plan are available on the Draft 2026 ISP Addendum Consultation page.

The inputs, assumptions and scenarios and ISP Methodology used to develop the 2026 ISP are also available. Consultation on the Addendum to the 2025 IASR was conducted as part of consultation on the Draft 2026 ISP.

AEMO has also prepared an information pack on the ISP to build a common understanding about what the ISP is, how it contributes to Australia’s energy transition, and opportunities for stakeholders to get involved, called the Integrated System Plan Toolkit.

ISP Timetable

The ISP Timetable provides stakeholders with the key milestones of the 2026 ISP development process, including the establishment of the Consumer Panel and dates for the release of the Inputs, Assumptions and Scenarios Report (IASR), the ISP Methodology, the Draft ISP and the final ISP. The image below provides a detailed timeline, and the 2026 ISP Timetable document can be downloaded at the link below.

23/10/2025
2026 ISP Timetable
1.05 MB

2025 Demand Side Factors Information Guidelines Consultation

AEMO developed the Demand Side Factors Information Guidelines via a two-stage consultation process between August 2025 and December 2025.

Developed in response to a December 2024 Australian Energy Market Commission (AEMC) rule change to enhance consideration of demand side factors in the ISP, the Guidelines set out the information AEMO considers necessary to prepare a demand side factors statement in the ISP.