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> The average American household uses about 29 kilowatts of power per day (29,000 megawatts).

Ignoring the megawatts error that the sibling pointed out, it's 29 kilowatt hours per day. Watts are a unit of power consumption -- joules (energy) per second.

One kilowatt hour is the energy used by running something at 1,000 Watts for one hour.




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