Investor Presentaiton

Clean Electricity Growth Plan Execution MW Location Capital ($ millions) PPA Term Garden Plain Wind 130 Hanna, AB $190 - $200 17 years¹ Customer Pembina and investment-grade customer EBITDA ($ millions) $14-$18 COD H2 2022 Northern Goldfields Solar 48 Western Australia White Rock Wind 300 Caddo County, OK North Carolina Solar 122 Horizon Hill Wind 200 North Carolina Logan County, OK AU$69 - $73 US$460-$470 US$99 US$290-$310 16 years Long-term 11 years Long-term BHP Amazon AU$9 - $10 H2 2022 US$42 - $46 H2 2023 Duke Meta US$9 US$27-$30 In service H2 2023 Mt Keith Transmission NA Western Australia AU$50 - $53 15 years BHP AU$6-$7 H2 2023 Expansion Capacity Target 2 GW 40% Capital Target $3 48% Billion Incremental EBITDA Target $250 55% Million 40% of Clean Electricity Growth Plan secured with over 3 years remaining in plan 20 1 Weighted average contract life TransAlta

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