A unit of energy:kWh
Understand watts, kilowatts, kilowatt hour and unit of electricity and ... Power and 
Energy/Electricity are two words that are used so much for... [DOC] [TLE] Sustainable Energy - without the hot air: Ch 2 Page 24 | David MacKay [PAR] The unit of energy I have chosen is the kilowatt-hour (kWh).