Why are Watt Hours not Watts per Hour? Are they the same thing?
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Watts per hour is a bit redundant. Watts is a measurement of energy used per second with the units of joules and seconds. Watts = (Joules/seconds). Watt hours is a total amount of energy used. If we take the formula for Watts and multiply by hours(3600 seconds) the result is joules or energy.
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