Since we're on an engineering website here, I would like to be pedantic and point out that it's kWh. If you write KWH that would mean Kelvin Watt henry, see htt

Since we're on an engineering website here, I would like to be pedantic and point out that it's kWh. If you write KWH that would mean Kelvin Watt henry, see https://en.wikipedia.org/wiki/International_System_of_Units https://en.wikipedia.org/wiki/International_System_of_Units. kWh means kilo Watt hours.