Investor Presentaiton

65 99 SPS Investor Fact Book October 2023 | Xcel Energy SPS | Plant Information Station, Location and Unit Steam: Fuel Installed Summer 2022 Net Dependable Capability (MW) Emissions Control Equipment Cunningham-Hobbs, NM, 2 Units Natural Gas Harrington-Amarillo (a), TX, 3 Units Coal 1957-1965 1976-1980 225 1,018 Unit 1 Unit 2 ESP (PM), LNBs (NOx), ACI (mercury), OFA BH (PM), LNBs (NOx), ACI (mercury), OFA BH (PM), LNBs (NOx), ACI (mercury), OFA Unit 3 Jones-Lubbock, TX, 2 Units Natural Gas 1971-1974 486 Each unit: OFA (NOx) Maddox-Hobbs, NM, 1 Unit Natural Gas 1967 112 OFA (NOx) Nichols-Amarillo, TX, 3 Units Natural Gas 1960-1968 457 Each unit: OFA (NOx) Plant X-Earth, TX, 4 Units Natural Gas 1952-1964 298 Unit 4: OFA (NOx) Each unit: BH (PM), LNBS Tolk-Muleshoe, TX, 2 Units Coal 1982-1985 1,067 (NOx), ACI (mercury) Combustion Turbine: Cunningham-Hobbs, NM, 2 Units Natural Gas 1998 207 Each unit: LNBs (NOx) Jones-Lubbock, TX, 2 Units Natural Gas 2011-2013 334 Each unit: LNBs (NOx) Maddox-Hobbs, NM, 1 Unit Natural Gas 1963-1976 61 Wind: Hale-Plainview, TX, 239 Units Sagamore-Dora, NM, 240 Units Wind Wind 2019 477 (b) 2020 507 (b) Total 5,249 (a) Expected to be converted to natural gas by the end of 2024. (b) Values disclosed are the generation levels at the point-of-interconnection for these wind units. Capacity is attainable only when wind conditions are sufficiently available (on demand net dependable capacity is zero). 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

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