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How do you calculate kilowatts per hour?


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Answered 2015-01-09 08:54:15

A kilowatt hour is calculated by adding the watts together and deviding by 1000, this will give you kilowatts (kW). Then work out how many hours you are using this load for. multiply the kW by the hours and you get kWh. eg 15 lamps at 100w = 1500w/1000 = 1.5 kW. If these were left on for 6 hours then 6 x 1.5 = 9 kWh.

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There is no such thing as a 'kilowatt per hour'. It's rather like saying 'kilometres per hour per hour', because a kilowatt is a special name given to a joule per second -in other words, it measures a rate.

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