There's no such thing. "Kilowatt" is a rate of using or moving energy. Unless
you're doing something really weird and unusual in an electronics lab, you'd
never have any use for a "rate per hour".
Mathematically, I guess that unit is analogous to an acceleration. It would
describe how the rate of using energy is growing or shrinking. Its dimensions
would be " Force - distance/Time2 ". After 50 years in the business, I've honestly
never heard of it. That could mean that I've led a sheltered existence, but
I prefer to understand from it that I've simply never encountered anything
where it was needed.
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1 kilowatt hour = 3,600,000 Joules 1 Tetrajoule = 1,000,000 Joules 1 kilowatt hour = 3.6 Tetrajoules
KWH
Watt, kilowatt, or megawatt are units of power (energy/time). A watt is 1 joule/second. A kilowatt is a thousand joules per second. A kilowatt is also 1 kWh/hour (kilowatt-hour / hour). Since you would usually pay per kilowatt-hour, you might be more interested in the number of kilowatt-hours. A megawatt is a million joules per second - or a thousand kWh/hour.
Multiply by kilovolts, and you will have it. For example: 1 amp hour X 0.120 kilovolts = 0.120 kilowatt hours
1 kilowatt = 1,000 watts1 watt = 1 joule per second1 hour = 3,600 seconds(1,500 kilowatt-hour) x (1,000 watt / kilowatt) x (1 joule / watt-second) x (3,600 second / hour) =(1,500 x 1,000 x 3,600) x (kilowatt - hour - watt - joule- second) / (kilowatt - watt - second - hour)= 5,400,000,000 joules