Alta Wind XI

Wind power plant in California, United States of America. Approximate location 35.065, -118.39.

WindCaliforniaUnited States of America

Alta Wind XI is a 90 MW wind power plant in California, United States of America. It is operated by NRG Yield LLC. Based on reported annual generation of 247 GWh, it can supply roughly 70,485 homes. It ranks #2096 of 9,833 United States of America power plants by installed capacity. Commissioned in 2014, it is around 12 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 10.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

90MW installed capacity
247GWh reported / yr
70,485homes powered
2014commissioned (~12 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0058395.

Reported generation trend

2014: 250 GWh20142015: 222 GWh20152016: 276 GWh20162017: 249 GWh20172018: 261 GWh20182019: 247 GWh2019276 GWh

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by NRG Yield LLC. All plants by this company →

Local climate & thermal context

This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a cold semi-arid steppe climate (Köppen BSk) — Northern Hemisphere, latitude 35.1°N — which shapes how much energy it can produce and how its output varies through the year.

16.7°Cannual mean temp
1,415heating degree-days (base 18°C)
960cooling degree-days (base 18°C)
831 melevation

Monthly mean temperature

J: 7 °CJF: 9 °CFM: 11 °CMA: 15 °CAM: 19 °CMJ: 24 °CJJ: 28 °CJA: 27 °CAS: 24 °CSO: 18 °CON: 11 °CND: 7 °CD28 °C

Heating degree-days here run 42% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 32/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

How it compares & nearby plants

The #494 largest wind power plant of 1139 in United States of America by capacity.

United States of America has 1139 wind power plants in this dataset, together about 104,477 MW of capacity.

Nearby power plants

Location

Coordinates 35.065, -118.39 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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