A megawatt-hour is a unit of energy used to measure large-scale electricity consumption or generation. It represents the amount of energy used when a system consumes 1 megawatt (MW) of power for one hour.

In practical terms, 1 MWh equals 1,000 kilowatt-hours (kWh). While kWh is commonly used for individual EV charging sessions and household electricity usage, MWh is typically used for measuring energy at a larger scale, such as charging networks, industrial facilities, power plants, or utility-level energy management.

In the EV ecosystem, MWh is often used to track total energy consumption across an entire charging station, fleet, or network over a period of time. This helps operators analyze large-scale energy usage, evaluate system performance, and plan infrastructure capacity more effectively.

Understanding MWh is important for energy planning, grid management, and reporting, as it provides a broader view of electricity usage and helps align EV charging operations with overall energy demand.