2021 Investor Day Presentation

Lake Pūkaki low range operation ■ Lake Pūkaki is consented to be used down to 513.0m ▪ Usage below 518.0m is generally tied to the System Operator's Electricity Risk Curves Operations have been extended down to 513.0m 1,767GWh Lake Pūkaki operating range schematic 532.5m top of consented operating range 523.8m current storage (10 May) 518.0m Electricity Risk Curves apply 178GWh 516.4m previous operational floor Security of Supply Alert Meridian. 367GWh 515.0m 513.0m bottom of consented range Official Conservation Campaign Source: Meridian 11 MAY 2021 2021 INVESTOR DAY PRESENTATION 44

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