NEM Overview: Monday 7 September 2026

NEM spot prices are trading in a tight $73-86/MWh band across the mainland this morning, with NSW leading at $85.86/MWh and TAS the softest at $73.10/MWh. Total demand sits around 7,894 MW in NSW, 6,551 MW in VIC, 6,386 MW in QLD, 1,455 MW in SA and 1,182 MW in TAS. The regional spread is narrow — only about $13/MWh separating the highest and lowest priced regions — indicating interconnectors are keeping the mainland reasonably well arbitraged, though flows show VIC exporting into both NSW (297 MW) and TAS (399 MW via Basslink) while drawing from SA (340 MW import).

Renewable penetration nationally is running at 49.5% on gridIQ's tracking score, but the regional split is stark. SA and TAS are the standouts, at 87.9% and 86.5% renewable respectively, with carbon intensity down at 0.067 and 0.088 tCO2/MWh — SA's wind fleet is contributing 1,228 MW against total demand of just 1,455 MW, and TAS hydro is providing 1,146 MW. QLD and VIC sit at the other end, with renewable shares of 18.3% and 21.6% and carbon intensity of 0.716 and 0.877 tCO2/MWh respectively — QLD black coal is generating 5,362 MW and VIC brown coal 3,565 MW, with VIC gas OCGT adding a further 767 MW. NSW is roughly in the middle at 32.8% renewable, with black coal at 5,275 MW, wind at 1,174 MW and batteries contributing 498 MW.

Grid stress reads elevated at 75.1 on the gridIQ score, and this aligns with an active reserve situation flagged overnight: AEMO issued a Forecast LOR1 for VIC covering 0700-0730 hrs today (min reserve 1,025 MW against a 1,155 MW requirement), though this has since been cancelled effective 2010 hrs. Traders should note VIC's reserve margin was tight heading into this morning's ramp and keep an eye on any re-declaration around the same window tomorrow. Elsewhere, a battery non-conformance (MRNBESS1, -10 MW) and wind farm non-conformance events in VIC over recent days point to ongoing forecasting noise from renewable and storage assets, but none of these are materially affecting today's price formation.

Price stability is soft at 23.6 on the gridIQ index despite the narrow interregional spread, suggesting intraperiod volatility is the bigger driver rather than regional divergence — worth watching into the evening peak, particularly in VIC given this morning's reserve tightness and its higher reliance on synchronous thermal generation.