1 watt-hour equals 1 watt times 1 hour, or 3600 joules.

MW is a unit of power just like kW 1MW = 1000 kW 1 mega-watt = 1000 kilo-watt Watt is a measurement of power. watt-hour is a unit of energy 1 mega-watt-hour = 1000 kilo-watt-hour

A watt hour is a unit of energy, not time -so you cannot ask how 'long' it is. The time taken to consume a watt hour of energy depends upon the rate (i.e. the power) at which it is consumed, expressed in watts. A watt hour is defined as the amount of energy consumed, over a period of one hour, at the rate of one watt.

The energy unit is not watts per hour, but watts times hour, simply called watt-hours.

One BTU is equal to about 1055 Joules or Watt-seconds; that is about 0.293 watt-hours. Actually there are different definitions of the BTU.

The energy unit is not watts per hour, but watts times hour, simply called watt-hours.

One BTU is equal to about 1055 Joules or Watt-seconds; that is about 0.293 watt-hours. Actually there are different definitions of the BTU.

The energy unit is not watts per hour, but watts times hour, simply called watt-hours.

One BTU is equal to about 1055 Joules or Watt-seconds; that is about 0.293 watt-hours. Actually there are different definitions of the BTU.

The energy unit is not watts per hour, but watts times hour, simply called watt-hours.

One BTU is equal to about 1055 Joules or Watt-seconds; that is about 0.293 watt-hours. Actually there are different definitions of the BTU.

This has no physical meaning. The correct unit for power is the watt (not watt per hour).