energy. Symbol kWh, properly kW·h. For a steady current, identically the product of power in kilowatts and time in hours, used particularly as a measure of electric energy consumed, = 3.6 MJ. See r.m.s. re alternating current.
UK 1882 The ‘energy contained in a current of one thousand amperes flowing under an electromotive force of one volt during one hour’, called also Board of Trade unit, and at one time the kelvin.




