Measurement · Definition
Capacity
The maximum rate at which a generator, plant, or power system is designed or reported to produce electricity at a given moment.
In plain languageThe maximum rate at which a generator, plant, or power system is designed or reported to produce electricity at a given moment.
- Category
- Measurement
- Primary reference
- U.S. Energy Information Administration
Why it matters
How this term helps you read grid data
Capacity describes capability, not how much electricity was actually produced over time. US Grid Explorer reports capacity mainly in megawatts.
Example
Capacity in practice
A 500 MW plant can have 500 MW of capacity even when it is producing less than that amount.
Reference
Check the primary source
US Grid Explorer paraphrases agency terminology for clarity. Consult the agency reference for formal definitions and current regulatory usage.
U.S. Energy Information Administration →