wattage

An amount of power, especially electric power, expressed in watts or kilowatts.

The electric power required by an appliance or device.

The rating in watts, of any electrical machine or device, of the power required to operate it: as, the wattage of a glow-lamp.

An amount or power (especially electric), expressed in watts, kilowatts etc

The power requirement of some electric appliance

the product of voltage and current