Capacity value for resources can be estimated in several ways, amongst others: • Marginal ELCC : Marginal reliability benefit of the next incremental unit • Class average ELCC : Average reliability contribution of all the resources of a single class • Portfolio ELCC : Reliability contribution of resources across multiple classes (e.g., solar, wind, and battery storage) • Vintaged Marginal ELCC : Marginal reliability benefit of the resource when installed (static over time)