Broadly defined, energy capacity is the amount of energy that can be stored or produced. The usage of the term capacity in this context commonly refers to the maximum electricity that can be supplied at a point in time. Energy capacities vary widely by region and technology. There are several important aspects of capacity, such as rated capacity, peak capacity, net capacity, declared net capacity, capacity factors, and battery capacity, which can be considered independently.
Salem Press Encyclopedia, 2020. 2p.