Why are Watt Hours not Watts per Hour? Are they the same thing?
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They are not the same thing.
Watt Hours is power over time.
Using 10 Watts for 5 hours is 50 Watt Hours of energy. 10 Watts for 100 hours is 1,000 Watt Hours.
Either way, it’s 10 Watts of power, but using it longer requires more Watt Hours of energy.
For example, a light bulb is rated in Watts, but a battery is rated in Watt Hours.
A 100 Watt Hour battery could power a 1 W bulb for 100 hours, or 20 W bulb for 5 hours.
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