Event Database

Market Event History

Searchable database of Australian energy market events: price spikes, negative pricing, record renewable generation and major grid constraints. Each event is enriched with AI-generated causal analysis.

●This week's events

Total Events

250

This Month

Most Active Region

TAS

Constraint EventTASmajor5 June 2026, 04:35 pm

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price)

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Price SpikeWAmoderate5 June 2026, 01:55 pm

WEM price spike in WA: $263/MWh across 1 trading interval

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Negative PriceQLDminor5 June 2026, 12:35 pm

Sustained negative pricing in QLD1: $-3/MWh for 2 intervals

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high_renewableTASminor5 June 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Negative PriceSAminor4 June 2026, 05:40 pm

Sustained negative pricing in SA1: $-3/MWh for 2 intervals

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Negative PriceVICminor4 June 2026, 02:55 pm

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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Constraint EventNEMmoderate4 June 2026, 12:30 pm

High-value binding constraint in NEM: F_S++TBTU_R60 ($985 shadow price)

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high_renewableSAminor4 June 2026, 12:00 pm

High renewable penetration in SA1: 92.3%

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Negative PriceSAminor4 June 2026, 11:40 am

Sustained negative pricing in SA1: $-3/MWh for 3 intervals

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Negative PriceQLDminor4 June 2026, 11:15 am

Sustained negative pricing in QLD1: $-3/MWh for 2 intervals

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Price SpikeWAmajor4 June 2026, 06:45 am

WEM price spike in WA: $347/MWh across 1 trading interval

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high_renewableTASminor4 June 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Negative PriceSAminor4 June 2026, 05:50 am

Sustained negative pricing in SA1: $-0/MWh for 2 intervals

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Negative PriceVICminor4 June 2026, 03:05 am

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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Negative PriceSAminor3 June 2026, 10:25 pm

Sustained negative pricing in SA1: $-0/MWh for 2 intervals

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Negative PriceVICminor3 June 2026, 08:35 pm

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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Price SpikeWAmajor3 June 2026, 08:25 pm

WEM price spike in WA: $361/MWh across 1 trading interval

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Negative PriceSAminor3 June 2026, 03:55 pm

Sustained negative pricing in SA1: $-2/MWh for 2 intervals

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Price SpikeWAmoderate3 June 2026, 02:00 pm

WEM price spike in WA: $263/MWh across 1 trading interval

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Negative PriceNSWminor3 June 2026, 01:15 pm

Sustained negative pricing in NSW1: $-5/MWh for 2 intervals

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high_renewableSAminor3 June 2026, 11:55 am

High renewable penetration in SA1: 95.9%

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Negative PriceQLDminor3 June 2026, 11:15 am

Sustained negative pricing in QLD1: $-3/MWh for 2 intervals

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Negative PriceVICminor3 June 2026, 10:45 am

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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Negative PriceSAminor3 June 2026, 10:00 am

Sustained negative pricing in SA1: $-5/MWh for 2 intervals

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high_renewableTASminor3 June 2026, 06:30 am

High renewable penetration in TAS1: 100.0%

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Negative PriceSAminor3 June 2026, 04:00 am

Sustained negative pricing in SA1: $-1/MWh for 2 intervals

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Negative PriceVICminor3 June 2026, 02:40 am

Sustained negative pricing in VIC1: $-2/MWh for 2 intervals

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Negative PriceSAminor2 June 2026, 10:10 pm

Sustained negative pricing in SA1: $-0/MWh for 2 intervals

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Negative PriceVICminor2 June 2026, 08:50 pm

Sustained negative pricing in VIC1: $-0/MWh for 2 intervals

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Negative PriceSAminor2 June 2026, 03:30 pm

Sustained negative pricing in SA1: $-1/MWh for 2 intervals

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Showing 30 of 250

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Recent Market Events

High-value binding constraint in TAS1: T_BLINK_TV_NGZ ($7308000 shadow price), TAS1, constraint_event, major
A major binding constraint (T_BLINK_TV_NGZ) with an exceptionally high shadow price of $7.308 million was binding in Tasmania during the early morning trading period of 5 June 2026. The constraint significantly restricted power flow despite relatively modest regional electricity prices around $80/MWh, with generation primarily supplied by hydroelectric (approximately 760 MW average) and wind generation (approximately 480 MW average).
WEM price spike in WA: $263/MWh across 1 trading interval, WA1, price_spike, moderate
The WEM in Western Australia experienced a moderate price spike to $263.34/MWh during the 03:55 trading interval on 5 June 2026, representing a sharp increase from the preceding $247.67/MWh settlement. This single-interval event occurred during the night-time period when solar generation was minimal and demand drivers supported elevated pricing.
Sustained negative pricing in QLD1: $-3/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing with rates reaching −$2.70/MWh across two intervals during the early morning period of 5 June 2026. The negative pricing occurred despite significant generation from coal (3150.71 MW), solar (4693.87 MW combined), and wind (720.3 MW), indicating an oversupply situation in the region.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania achieved 100% renewable electricity generation during the evening of 4 June 2026, with hydro and wind resources supplying approximately 3,438 MW of generation across six settlement intervals. Regional reference prices remained steady at $80.18/MWh throughout the period, indicating a stable market outcome despite the high renewable penetration.
Sustained negative pricing in SA1: $-3/MWh for 2 intervals, SA1, negative_price, minor
SA1 experienced sustained negative pricing across five consecutive intervals on 4 June 2026 between 07:15 and 07:45, with the minimum price reaching −$3/MWh. The region's generation mix was dominated by wind (1,662.82 MW) and solar (75.88 MW combined), with modest gas-fired capacity (100.92 MW combined), creating an oversupply condition during low demand periods.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
VIC1 experienced sustained negative pricing of −$0.1/MWh across two consecutive intervals (04:55–05:00) on 4 June 2026, with an earlier dip to −$15.41/MWh at 04:40. The event occurred during early morning periods when wind generation exceeded 7 GW across the region, contributing to oversupply conditions.
High-value binding constraint in NEM: F_S++TBTU_R60 ($985 shadow price), NEM, constraint_event, moderate
A significant binding constraint (F_S++TBTU_R60) emerged in the NEM with a shadow price of $984.82/MWh, substantially higher than concurrent binding constraints which ranged from $4.90/MWh. This high-value constraint indicates severe scarcity in the system, likely restricting power flow and elevating spot prices across the affected region.
High renewable penetration in SA1: 92.3%, SA1, high_renewable, minor
South Australia (SA1) experienced high renewable energy penetration of 92.3% during the early morning period of 4 June 2026, with wind generation dominating at 1,441 MW and solar contributing 429 MW combined. Negative wholesale prices ranging from −$3 to −$2/MWh were recorded across six consecutive 5-minute settlements, indicating an oversupply of renewable generation relative to demand.
Sustained negative pricing in SA1: $-3/MWh for 3 intervals, SA1, negative_price, minor
SA1 experienced sustained negative pricing at −$2–$3/MWh across five intervals during the early morning of 4 June 2026, with the lowest trough at −$3/MWh. The region was heavily supplied by renewable generation, particularly wind (1493 MW) and solar (449 MW combined), alongside battery and gas-fired capacity totalling approximately 185 MW.
Sustained negative pricing in QLD1: $-3/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing for two consecutive intervals (01:15–01:20 on 4 June 2026), with prices falling to −$2.50/MWh. The region was operating with high solar generation (approximately 2,341 MW average) combined with substantial coal baseload and wind output, creating excess supply conditions during a low-demand period.
WEM price spike in WA: $347/MWh across 1 trading interval, WA1, price_spike, major
The WEM in Western Australia experienced a significant price spike to $346.97/MWh during the 20:45 trading interval on 3 June 2026, representing a 134% increase from the previous interval's $148.64/MWh. Prices continued escalating sharply to $370.42/MWh by 20:55, indicating sustained market tightness across multiple consecutive intervals.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania's electricity system reached 100% renewable generation on 3 June 2026 at approximately 20:25 AEST, with hydroelectric output totalling approximately 2,680 MW and wind generation around 260 MW combined. Regional Reference Price remained relatively stable in the $80–87/MWh range throughout the period, indicating manageable supply-demand balance despite the extreme renewable penetration.
Sustained negative pricing in SA1: $-0/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced minor negative pricing with spot prices falling to approximately −$0.10/MWh across two consecutive intervals (19:50 and 19:55 on 3 June 2026). This occurred during an evening period dominated by substantial wind generation of ~1,714 MW, which appears to have exceeded local demand requirements.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
Victoria (VIC1) experienced minor negative pricing during the 16:40–17:10 AEST period on 3 June 2026, with spot prices touching −$0.05/MWh across two intervals. The pricing occurred during a period of sustained high wind generation (approximately 3,600–3,625 MW) combined with brown coal baseload (2,959 MW), creating an oversupply condition in the region.
Sustained negative pricing in SA1: $-0/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing at −$0.09/MWh across two consecutive 5-minute intervals (12:25–12:30 on 3 June 2026), representing a minor pricing anomaly in an otherwise low-price environment. The negative pricing occurred during a period of sharp price decline from $26.43/MWh to −$0.09/MWh over just 15 minutes, indicating rapid supply–demand imbalance.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
Victoria's VIC1 region experienced minor negative pricing at -$0.05/MWh across two settlement intervals (10:25 and 10:35–10:40 on 3 June 2026), representing a brief episode of oversupply in an otherwise low-price period. The event was characterised by rapid price oscillation between near-zero and slightly negative values, indicating marginal excess generation that dispatch operators were reluctant to curtail.
WEM price spike in WA: $361/MWh across 1 trading interval, WA1, price_spike, major
The WEM experienced a sharp price spike to $361.06/MWh at 10:25 AM on 3 June 2026, with prices remaining elevated between $361–$372/MWh for approximately 30 minutes. This represented a dramatic increase from the preceding baseline of ~$127–$171/MWh, suggesting a sudden supply-demand imbalance or constraint activation in the WA market.
Sustained negative pricing in SA1: $-2/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing of approximately -$2/MWh across two consecutive intervals (05:40-05:45 and 05:55-06:00) on 3 June 2026 during early morning hours. The negative pricing occurred despite the region being classified as a minor severity event, indicating temporary oversupply conditions were quickly resolved.
WEM price spike in WA: $263/MWh across 1 trading interval, WA1, price_spike, moderate
The WEM experienced a moderate price spike to $263.34/MWh in WA1 during the 04:00 trading interval on 3 June 2026, representing a sharp 56% increase from the previous interval's $168.93/MWh. Prices remained elevated across the wider period (04:00–04:15), subsequently declining as system conditions eased.
Sustained negative pricing in NSW1: $-5/MWh for 2 intervals, NSW1, negative_price, minor
NSW1 experienced sustained negative pricing at -$5.01/MWh during the 03:20 settlement interval on 3 June 2026, with negative prices persisting across multiple intervals in the early morning period. The negative pricing reflects a temporary oversupply condition in the region during off-peak hours when renewable generation remained elevated.
High renewable penetration in SA1: 95.9%, SA1, high_renewable, minor
South Australia (SA1) experienced exceptionally high renewable penetration of 95.9% during the early morning period of 3 June 2026, driven predominantly by wind generation of 1,731 MW combined with solar output totalling approximately 425 MW. The high renewable generation resulted in negative spot prices ranging from −$0.74/MWh to −$2.00/MWh, indicating oversupply conditions where generators were paying to dispatch energy into the market.
Sustained negative pricing in QLD1: $-3/MWh for 2 intervals, QLD1, negative_price, minor
QLD1 experienced sustained negative pricing at −$2.65/MWh and −$1.99/MWh across two consecutive intervals (01:15–01:20 on 3 June 2026), representing minor negative pricing with near-zero prices in adjacent periods. This indicates a temporary supply–demand imbalance requiring financial compensation to reduce generation or increase consumption.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
Victoria experienced two consecutive intervals of negative pricing (settling at -$0.05/MWh and -$0.10/MWh) during the early morning period of 3 June 2026, representing a minor market event. This followed a period of very low positive prices, with the region's spot price declining from $4.22/MWh to negative territory over approximately 25 minutes.
Sustained negative pricing in SA1: $-5/MWh for 2 intervals, SA1, negative_price, minor
South Australia region 1 (SA1) experienced sustained negative pricing at −$5.06/MWh and −$2.00/MWh across two consecutive 5-minute intervals commencing 00:00 on 3 June 2026. This follows a period of low but positive pricing (ranging $2.86–$11.51/MWh) in the preceding hour, indicating a sharp shift in market conditions during the overnight period.
High renewable penetration in TAS1: 100.0%, TAS1, high_renewable, minor
Tasmania's electricity grid reached 100% renewable penetration on 2 June 2026 at 20:05–20:35 AEST, with hydroelectric generation (650–787 MW) and wind (21–41 MW) meeting all demand. Regional reference prices (RRPs) remained stable at approximately $77/MWh for the first three intervals before rising to $80.16–80.20/MWh from 20:20 onwards.
Sustained negative pricing in SA1: $-1/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing on 2 June 2026 at 17:50–18:05 AEST, with prices ranging from –$1.05/MWh to –$3.00/MWh across a 2-interval minimum. This minor severity event reflects a brief period of oversupply relative to demand in the region.
Sustained negative pricing in VIC1: $-2/MWh for 2 intervals, VIC1, negative_price, minor
Victoria experienced sustained negative pricing of $-2/MWh across two consecutive intervals (16:25–16:30) on 2 June 2026, with prices gradually declining from $-0.81/MWh before reaching the floor. This minor severity event reflects oversupply conditions in the VIC1 region during the late afternoon period.
Sustained negative pricing in SA1: $-0/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing across two settlement intervals on 2 June 2026 around midday, with prices reaching approximately −$0.10/MWh. The negative pricing occurred intermittently across a seven-interval window, indicating brief periods of energy surplus rather than sustained oversupply.
Sustained negative pricing in VIC1: $-0/MWh for 2 intervals, VIC1, negative_price, minor
VIC1 experienced minor negative pricing for two consecutive intervals (10:50–11:00) on 2 June 2026, with the Renewable Energy Rate (RRP) reaching −$0.05/MWh. This brief negative pricing event followed a sharp price collapse from $5.56/MWh to near-zero levels, indicating a sudden supply–demand imbalance in the region.
Sustained negative pricing in SA1: $-1/MWh for 2 intervals, SA1, negative_price, minor
South Australia (SA1) experienced sustained negative pricing at -$1/MWh for two consecutive 5-minute intervals (05:30 and 05:35 on 2 June 2026), representing a minor market event during early morning peak solar generation. Prices recovered sharply to positive territory in the preceding interval, with the rapid price movement suggesting a sudden supply-demand imbalance.