1 kWh in 10 hours
1 kWh from a utility
|A well conditioned athlete can produce much more
than a horsepower --- during a short time interval.
The same athlete, asked to produce a steady output of power over a period of a day (10 hours, say) will produce perhaps 100 watts of useful power, if connected to a machine the most efficient way, via bicycle pedals.
The athlete thus produces one kilowatt-hour of useful work in 10 hours. How much would you pay him (her)?
To obtain one kWh of energy from a utility costs a bit less --- about a dime.
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