GWh
gigawatt-hour
Energyexact by definition
The gigawatt-hour is exactly 3.6 × 10¹² joules, a million kilowatt-hours. Utility scale generation and storage are reported in GWh: a large pumped-storage plant holds a few GWh, and a 100 MW wind farm produces about 300 GWh a year.
| 1 GWh | 3,600,000,000,000 J |
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