Kilowatt-hour

The kilowatt-hour (symbol: kWh ) is a practical unit of measurement of energy being worth 3,6 megajoules. It is especially used to measure the electrical energy.

It is the power consumption by an apparatus of a power equal to one kilowatt (1 000 Watt S) functioning during a hour (1 kilowatt × 1 hour).

Public price including all taxes of one kWh electricity in France in 2006 is approximately 0,11 €; with the Quebec it is approximately of 0.05 $c.

An apparatus consuming 10 Watts (a Put in day before of TV for example) uses 87,6 kWh lasting one year and its cost is thus approximately 9,68 €.

One uses also other prefixes, for example:

  • 1 watt-hour (Wh) =: 3600  joules

  • 1 kilowatt-hour (kWh) =: 1000  Wh =: 3,6 megajoules
  • 1 megawatt-hour (MWh) =: 1000  kWh =: 1000000  Wh
  • 1 gigawatt-hour (GWh) =: 1000  MWh =: 1000000  kWh =: 1000000000  Wh
  • 1 térawatt-hour (TWh) =: 1000  GWh =: 1000000  MWh =: 1000000000  kWh =: 1000000000000  Wh

Internal bonds

  • EDF: Production company and of distribution of electricity in France.
  • Hydro-Quebec: Production company and of distribution of electricity in Quebec.

External bonds

  • Definition of the kilowatt-hour on energy-environnement.ch
  • Conversion of kilowatt-hour towards other units of energy
  • Tariff EDF into Metropolis
  • Hydro-Quebec (official site)

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