Supply, the resources available to meet demand, is crucial to the resource adequacy equation. One way to look at resources is nameplate capacity—the amount of electricity a resource can produce in a constraint-free world. Resources do not actually produce at their nameplate levels due to things like weather, temperature, fuel supply, equipment failures, and age. However, nameplate capacity is useful in understanding the resource portfolio of an area.
The expected nameplate capacity installed and available during the peak demand hours is about 258 GW in 2020, growing to 275 GW in 2029; about 6.5% growth. The capacity portfolio is broken down into four main resource types—baseload, hydro, solar, and wind—to see how each is represented in the overall portfolio.
The expected portfolio in 2020 is 51% baseload, 29% hydro, 11% wind, and 10% solar. By 2029, with continuing penetration of wind and solar resources, the expected portfolio is 49% baseload, 28% hydro, 12% wind, and 11% solar.