Investor Presentaiton

Impact of COVID-19 on Ausgrid's network Actual energy consumption data on Ausgrid's network indicates a recent stabilisation from the initial COVID-19 volume reduction of ~10% in April 2020. The increase in residential consumption and the decrease in commercial and industrial load largely offset each other COVID-19 Impacts Observations Volume (weekday and weekend data) Mix (Pre vs. Post, mid-April) 1 COVID-19 Impacts (mid-Jul)² Comments Ausgrid overall Residential 100% -10% +2.1% 33% +6% +15% COVID-19 impact on commercial and industrial segments is being offset by increased residential demand Residential consumption above FY19 resulting from school holidays and travel restrictions Large businesses 30% -22% -13% Large and medium customers are showing slow signs of recovery Medium businesses 8% -25% -11% Small businesses 6% -25% -7% Small business consumption is showing stronger signs of recovery with week-on-week improvement since mid-April Others: High voltage and sub-transmission 23% -13% -17% High voltage customers remain impacted, notably in selected industry sectors such as mining Notes: 1. Comparison of two weeks pre-COVID-19 baseline with four weeks post COVID-19 ending on 19 April, using comparable days with similar weather patterns 2. 14 day rolling average against the same period in FY19. This allows us to moderate for time of year effects and monitor each customer and industry segment as they recover at varying pace Better Ausgrid Together 24 21

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