Investor Presentaiton

INFRASTRUCTURE FOR THE FUTURE SA POWER NETWORKS Financial ($m) (1) Regulated revenue – DUOS Semi-regulated revenue Unregulated revenue Total Revenue Operating costs (2) Enerven margin EBITDA Other HY 2020 HY 2019 Change CPI-X $10.7m 430.0 412.6 40.6 46.7 STPIS(4) $17.7m 4.8 5.5 Customer 1.2% 475.4 464.8 2.3% Growth (5) (130.9) (136.3) (5) Consumption -4.4% 17.1 9.3 361.6 337.8 7.0% FTE -2.3% Change(5) Net finance costs (3) Net Debt/ (72.2) (69.6) 73.8% RAB Net capital expenditure 177.1 222.9 FFO/ Distributions received by Spark Infrastructure 46.8 55.2 -15.2% 17.8% Net Debt On an adjusted EBITDA (2) basis the HY2020 result increased by $26.9m or 8.1% (1) 100% basis (2) HY2020: $0.4m positive revaluation adjustments to employee entitlements provisions (HY2019: $3.5m positive revaluation adjustment) (3) HY2020 includes a $4.1m (loss) credit valuation hedge adjustment (HY2019: includes a $2.1m loss) (4) 2017/18 STPIS result to be recovered from 1 July 2019 (5) Compared with HY2019 Spark Infrastructure I Investor Presentation | August 2020 13

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