Definitions for

**"Gigawatt-hour"**A quantity of electrical energy equal to 1 million kilowatt-hours.

One billion watt-hours.

1,000 megawatt-hours or 1 billion watt-hours.

Definitions for **"Gigawatt-hour"**

A quantity of electrical energy equal to 1 million kilowatt-hours.

One billion watt-hours.

1,000 megawatt-hours or 1 billion watt-hours.