Investor Presentaiton

NSPW | Plant Information NSPW | Investor Fact Book October 2023 | Xcel Energy Fuel Installed Summer 2022 Net Dependable Capability (MW) Emissions Control Equipment Station, Location and Unit Steam: Coal/Wood/ Bay Front-Ashland, Wis., 3 Units 1948-1956 41 Natural Gas Unit 1 Coal/Wood/ Natural Gas Coal/Wood/ Unit 2 Natural Gas Wood/Refuse- French Island-La Crosse, Wis., 2 Units 1940-1948 16 (a) derived fuel Combustion Turbine: French Island-La Crosse, Wis., 2 Units Oil 1974 122 Wheaton-Eau Claire, Wis., 5 Units Natural Gas/Oil 1973 234 Hydro: Various locations, 62 Units Hydro Various 135 Total 548 (a) Refuse-derived fuel is made from municipal solid waste. BH (PM), ACI (mercury), UI (NOx) BH (PM), ACI (mercury), UI (NOx) Each unit: BH (PM), LI (acid gases), UI (NOx), ACI (Mercury) PM Particulate Matter SCR Selective Catalytic Reduction NOX - Nitrogen Oxides ACI Activated Carbon Injection LNBs Low-NOx Burners OFA - Overfire Air CO Carbon Monoxide ESP Electrostatic Precipitator BH - Baghouse DLI Dry Limestone Injection LI-Lime Injection UI-Urea Injection DS-Dry Scrubber WS Wet Scrubber WI Water Injection MCM Mechanical Collector & Multiclone OC- Oxidation Catalyst 46

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