Gigawatt-hours (gWh)
One gigawatt-hour equals one billion (1,000,000,000) watt-hours, one million (1,000,000) kilowatt-hours, or one thousand (1,000) megawatt-hours.
One gigawatt-hour equals one billion (1,000,000,000) watt-hours, one million (1,000,000) kilowatt-hours, or one thousand (1,000) megawatt-hours.