NEM fuel mix

Grid-scale generation (AEMO dispatch SCADA) plus rooftop solar as a band of its own — rooftop is AEMO’s 30-minute estimate of behind-the-meter PV, modelled rather than metered, published about half an hour behind SCADA: the newest intervals show grid-scale only until the estimate lands (the totals say which). Still not demand — behind-the-meter consumption keeps supply and demand distinct. Values are net MW: storage draws below zero while charging. Times are AEST (NEM market time, UTC+10, no DST); each point is the interval ending at that time — 5-minute at 24H, stepping up to daily at longer ranges. Overlays come from AEMO DispatchIS: price is the regional reference price (RRP, $/MWh, on a symlog-style axis — negative prices are routine); demand is the dispatch-run TOTALDEMAND, not measured operational demand.

Carbon intensity is an estimate, computed from AEMO’s published CDEII emission factors × dispatch SCADA, and reconciled daily against AEMO’s official index. Factors are per MWh sent out while SCADA is as-generated, so these numbers read a few percent high. Generation from units with no published factor is excluded rather than counted as zero-emission — see the method and its caveats.