A gigawatt-hour (GWh) is a unit of energy representing one billion watt-hours, or one million kilowatt-hours. To put it into perspective, a single gigawatt-hour can power approximately 750,000 homes for an hour or a modest-sized city for a few hours! This unit is commonly used in measuring the output of power stations or the amount of electricity consumed over a span.
Interestingly, the largest solar farm in the world, Noor Abu Dhabi, boasts a capacity of about 1,177 gigawatts per year, reflecting how renewable energy advancements continue to scale. As nations transition to greener power, understanding energy units like the gigawatt-hour becomes crucial in evaluating our global energy impact and future sustainability targets.
The watt-hour (Wh) is a unit of energy that measures the amount of electricity consumed or generated over time. It is the energy equivalent to one watt of power consumed for one hour. While electricity bills commonly display kilowatt-hours (kWh), understanding watt-hours can give you clearer insights into the energy efficiency of your household. For instance, a 60-watt incandescent light bulb running for one hour uses 60 watt-hours of electricity, while an energy-efficient LED bulb might only use around 10 watt-hours for the same illumination.
Interestingly, the concept of the watt-hour helps in comprehending renewable energy systems. Solar panels, for example, are rated in watts, but their output over time is often expressed in watt-hours or kilowatt-hours. Knowing this can help you assess how much energy your solar array could generate or your battery storage can hold, emphasizing the real value of alternative energy sources.
| Gigawatt-hours | Watt-hours |
|---|---|
0
GWh
|
0
Wh
|
0.1
GWh
|
1e+8
Wh
|
0.2
GWh
|
2e+8
Wh
|
0.3
GWh
|
3e+8
Wh
|
0.4
GWh
|
4e+8
Wh
|
0.5
GWh
|
5e+8
Wh
|
0.6
GWh
|
6e+8
Wh
|
0.7
GWh
|
7e+8
Wh
|
0.8
GWh
|
8e+8
Wh
|
0.9
GWh
|
9e+8
Wh
|
1
GWh
|
1e+9
Wh
|
1.1
GWh
|
1.1e+9
Wh
|
1.2
GWh
|
1.2e+9
Wh
|
1.3
GWh
|
1.3e+9
Wh
|
1.4
GWh
|
1.4e+9
Wh
|
1.5
GWh
|
1.5e+9
Wh
|
1.6
GWh
|
1.6e+9
Wh
|
1.7
GWh
|
1.7e+9
Wh
|
1.8
GWh
|
1.8e+9
Wh
|
1.9
GWh
|
1.9e+9
Wh
|
2
GWh
|
2e+9
Wh
|
2.1
GWh
|
2.1e+9
Wh
|
2.2
GWh
|
2.2e+9
Wh
|
2.3
GWh
|
2.3e+9
Wh
|
2.4
GWh
|
2.4e+9
Wh
|
2.5
GWh
|
2.5e+9
Wh
|
2.6
GWh
|
2.6e+9
Wh
|
2.7
GWh
|
2.7e+9
Wh
|
2.8
GWh
|
2.8e+9
Wh
|
2.9
GWh
|
2.9e+9
Wh
|
3
GWh
|
3e+9
Wh
|
3.1
GWh
|
3.1e+9
Wh
|
3.2
GWh
|
3.2e+9
Wh
|
3.3
GWh
|
3.3e+9
Wh
|
3.4
GWh
|
3.4e+9
Wh
|
3.5
GWh
|
3.5e+9
Wh
|
3.6
GWh
|
3.6e+9
Wh
|
3.7
GWh
|
3.7e+9
Wh
|
3.8
GWh
|
3.8e+9
Wh
|
3.9
GWh
|
3.9e+9
Wh
|
4
GWh
|
4e+9
Wh
|
4.1
GWh
|
4.1e+9
Wh
|
4.2
GWh
|
4.2e+9
Wh
|
4.3
GWh
|
4.3e+9
Wh
|
4.4
GWh
|
4.4e+9
Wh
|
4.5
GWh
|
4.5e+9
Wh
|
4.6
GWh
|
4.6e+9
Wh
|
4.7
GWh
|
4.7e+9
Wh
|
4.8
GWh
|
4.8e+9
Wh
|
4.9
GWh
|
4.9e+9
Wh
|
5
GWh
|
5e+9
Wh
|
5.1
GWh
|
5.1e+9
Wh
|
5.2
GWh
|
5.2e+9
Wh
|
5.3
GWh
|
5.3e+9
Wh
|
5.4
GWh
|
5.4e+9
Wh
|
5.5
GWh
|
5.5e+9
Wh
|
5.6
GWh
|
5.6e+9
Wh
|
5.7
GWh
|
5.7e+9
Wh
|
5.8
GWh
|
5.8e+9
Wh
|
5.9
GWh
|
5.9e+9
Wh
|
6
GWh
|
6e+9
Wh
|
6.1
GWh
|
6.1e+9
Wh
|
6.2
GWh
|
6.2e+9
Wh
|
6.3
GWh
|
6.3e+9
Wh
|
6.4
GWh
|
6.4e+9
Wh
|
6.5
GWh
|
6.5e+9
Wh
|
6.6
GWh
|
6.6e+9
Wh
|
6.7
GWh
|
6.7e+9
Wh
|
6.8
GWh
|
6.8e+9
Wh
|
6.9
GWh
|
6.9e+9
Wh
|
7
GWh
|
7e+9
Wh
|
7.1
GWh
|
7.1e+9
Wh
|
7.2
GWh
|
7.2e+9
Wh
|
7.3
GWh
|
7.3e+9
Wh
|
7.4
GWh
|
7.4e+9
Wh
|
7.5
GWh
|
7.5e+9
Wh
|
7.6
GWh
|
7.6e+9
Wh
|
7.7
GWh
|
7.7e+9
Wh
|
7.8
GWh
|
7.8e+9
Wh
|
7.9
GWh
|
7.9e+9
Wh
|
8
GWh
|
8e+9
Wh
|
8.1
GWh
|
8.1e+9
Wh
|
8.2
GWh
|
8.2e+9
Wh
|
8.3
GWh
|
8.3e+9
Wh
|
8.4
GWh
|
8.4e+9
Wh
|
8.5
GWh
|
8.5e+9
Wh
|
8.6
GWh
|
8.6e+9
Wh
|
8.7
GWh
|
8.7e+9
Wh
|
8.8
GWh
|
8.8e+9
Wh
|
8.9
GWh
|
8.9e+9
Wh
|
9
GWh
|
9e+9
Wh
|
9.1
GWh
|
9.1e+9
Wh
|
9.2
GWh
|
9.2e+9
Wh
|
9.3
GWh
|
9.3e+9
Wh
|
9.4
GWh
|
9.4e+9
Wh
|
9.5
GWh
|
9.5e+9
Wh
|
9.6
GWh
|
9.6e+9
Wh
|
9.7
GWh
|
9.7e+9
Wh
|
9.8
GWh
|
9.8e+9
Wh
|
9.9
GWh
|
9.9e+9
Wh
|
10
GWh
|
1e+10
Wh
|
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