More confusion with units.

This evening's BBC news included a reference to an alleged power consumption of several 'megawatts per hour'. A megawatt is a unit of power and equals a million joules per second. A megawatt per hour would therefore be one million joules per second per hour and would measure a rate of increase in power. If sustained for a week such a rate of increase would produce a final power output of 168 megawatts.