A megawatt-hour (MWh) is a unit of energy that represents one megawatt of power used for one hour. It is commonly used to measure electricity generation and consumption. For example, if a power plant generates 1 megawatt of electricity continuously for one hour, it produces 1 MWh of energy. This measurement helps utilities and consumers understand energy usage and costs. In practical terms, 1 MWh can power about 330 average homes for one hour, depending on their energy consumption. Understanding megawatt-hours is essential for managing energy resources and planning for future energy needs, especially in discussions about renewable energy sources like solar power and wind energy.