Measurement · Definition
Megawatt-hour (MWh)
A unit of energy equal to one megawatt sustained for one hour.
In plain languageA unit of energy equal to one megawatt sustained for one hour.
- Category
- Measurement
- Primary reference
- U.S. Energy Information Administration
Why it matters
How this term helps you read grid data
Megawatt-hours measure an amount of electricity over time. They are used for generation, consumption, and storage energy capacity.
Example
Megawatt-hour (MWh) in practice
A 100 MW generator running at full output for three hours produces 300 MWh.
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 →