NEM Overview: Saturday 8 August 2026

NEM spot prices are showing a sharp east-west split this morning. WA1 leads at $116.32/MWh, while NSW1 and QLD1 sit at $76.29/MWh and $68.84/MWh respectively. Meanwhile VIC1, SA1 and TAS1 have all fallen into negative territory at -$2.99, -$6.25 and -$3.16/MWh, reflecting strong wind output across the southern regions overnight. This ~$122/MWh spread between WA1 and the negative-priced southern states highlights the degree of regional decoupling currently in the market.

Generation mix reflects that split clearly. SA1 is running at 95.3% renewable penetration with wind contributing 1,708 MW against total demand of just 1,318 MW, pushing prices negative and requiring net imports from Victoria (V-SA flow at -419 MW, binding). TAS1 sits at 83.5% renewable with hydro (415 MW) and wind (209 MW) covering local demand comfortably. VIC1 is at 52.0% renewable with wind at 3,050 MW alongside 2,820 MW of brown coal. NSW1 (20.8% renewable) and QLD1 (18.6% renewable) remain more reliant on black coal, at 5,220 MW and 5,164 MW respectively, with wind and solar making smaller contributions given cloud cover sitting near 80-98% across both regions today. NEM-wide renewable penetration is tracking at 48.2%.

Grid stress is elevated at 51/100, consistent with several active AEMO notices. SA1 remains under an active market intervention: AEMO issued a direction to a participant at 15:35 AEST yesterday due to voltage conditions, with the intervention event still in force and a further foreseeable intervention flagged for SA from 05:00 today. AEMO has also reclassified the Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines in SA as a credible contingency due to severe weather, effective from 17:15 yesterday. In Queensland, an unplanned outage of the Tarong 275kV circuit breaker has triggered the Q-HATR constraint set affecting NSW1-QLD1 transfer capability, and a related NSW automated constraint (CA_SYDS) remains in place for Sydney network security. Traders should watch the VIC1-NSW1 interconnector, which is binding at 763 MW export, and the V-S-MNSP1 link binding at -86 MW into SA.

For today's outlook, cloud cover of 80-100% across NSW1, VIC1 and TAS1 will suppress solar output, leaving wind and hydro as the primary renewable contributors. SA1 wind potential eases slightly through the day but should keep prices soft unless the active contingency reclassification triggers further intervention. QLD1 and NSW1 price levels are likely to hold higher given lower renewable shares and continuing network constraints from the Tarong outage.