Market intelligence / AU-WEM

Western Australia / SWIS

One market view for the isolated grid: current operation, distributed-energy adoption, the people and climate behind it, forward delivery, economics and the condition of every decision input.

System: South West Interconnected System
Operating record: Through 28 July 2026
DER edition: 2026-05
Evidence gate: Caution

Monitor this market Open operating record JSON

The market read

What is true, what moved, and whether the evidence is ready.

Operating now

46.1%

Rooftop PV share of the underlying-demand proxy at its peak on 28 July 2026.

Inspect stress days

Latest material change

The SWIS operating layer is retained separately from its outlook

Observed evidence, observed, dated 20 July 2026.

Open the delivery ledger

Caution

3/3

The decision view is usable with the named source, cadence or confidence caveats.

Inspect the evidence gate

Current operation

The transition has a daily shape.

Minimum registered demand falls as rooftop PV rises, then the system must meet the evening return. These are observed operating measures, kept separate from the forward WEM outlook.

AEMO WEM operating pulse

Solar, minimum demand and the evening return.

Minimum demandPeak rooftop PVEvening ramp

Pressure map

Where the market signal is concentrated.

The opportunity index is a relative evidence screen. It highlights where deeper diligence is warranted; it is not a valuation or investment recommendation.

Open the scored dossier

41.2% average rooftop-PV share at its daily peak and a 0.7x evening-ramp ratio put flexibility at the centre of the isolated-grid result.

Overall48

Storage42

Solar momentum69

Flexible load38

Four evidence layers

Grid, adoption, people and production belong in the same frame.

Distributed energy

3,167 MW of allocated rooftop solar records

Solar records: 564,139
Battery records: 43,150

CER edition 2026-05. Records are allocated through a postcode-to-SA2 crosswalk and are not premises.

Open this layer

People behind the meters

2,900,474 people in the screening cohort

Households: 928,240
Population change: 31.0%

2025 population estimate with 2021 household structure across 246 areas.

Open this layer

Material change

Forecasts do not become operating facts.

Each record retains its evidence type, status, source edition and next checkpoint. Forward context remains visible without replacing the daily operating record.

transition-delivery-2026-07 / 4 SWIS records

20 July 2026ObservedObservedHigh confidence

The SWIS operating layer is retained separately from its outlook

Five-minute WEM observations feed daily demand, rooftop PV, ramp and mix records.

Use observed records to settle due forecasts, never to imply future delivery.

Continue the investigation AEMO WEM data service

15 July 2026ForecastConditionalHigh confidence

Anticipated capacity determines when the modelled shortfall opens

AEMO identifies 622 MW of anticipated capacity in 2028-29.

Track assets into committed and operating status rather than treating the aggregate as delivered.

Evidence condition

Every layer carries its own clock.

Observation end, source check, version and confidence remain separate. A recently rendered page does not make an older source observation current.

Full operations ledger

Evidence layer	Status	Version	Observation ends	Source checked	Confidence
SWIS Observatory The shared release heartbeat is pending connection to the SWIS pipeline.	current	operations-swis-2026-07-28	28 July 2026	30 July 2026	High
SWIS DER Adoption Recent certificate cohorts can be incomplete while installations move through validation.	current	swis-der-cer-2026-05	31 May 2026	15 July 2026	High
SWIS Grid Demographic Atlas

Market reading

Reports that explain the movement.

All reports

100%AVG 52.4%80.8% MAX

Continue the decision

Enter through the market, then choose the depth.

Every specialist surface returns to the same WA/SWIS entity, source state and market codes. The question changes; the evidence identity does not.

Observe

Daily operating recordMinimum demand, rooftop PV and the evening operating ramp.DER adoption mapSolar, batteries, housing context and network opportunities by local area.Demographic atlasPopulation, households and addressable detached-home context.

Plan

Transition deliveryForecast, permission, delivery and operation kept as separate evidence states.

Western Australia / SWIS

What is true, what moved, and whether the evidence is ready.

The transition has a daily shape.

Solar, minimum demand and the evening return.

Where the market signal is concentrated.

Grid, adoption, people and production belong in the same frame.

3,167 MW of allocated rooftop solar records

2,900,474 people in the screening cohort

Forecasts do not become operating facts.

The SWIS operating layer is retained separately from its outlook

Anticipated capacity determines when the modelled shortfall opens

Every layer carries its own clock.

Reports that explain the movement.

Enter through the market, then choose the depth.

1,793 kWh/kWp expected year

Tariff and export conditions set the local value.

Existing and committed capacity remains above target through 2028-29

The modelled VPP contribution now has an operating test

SWIS Rooftop Solar Atlas, 2026

Seven proposals to change how Western Australia sees its own rooftops

The 2026 WEM ESOO: A Forecast Layer for the SWIS

Australian Solar and Storage Evidence Register, 2026