Commercial 'Unit' of Energy = I KiloWatt * 1 Hour
=1kWh
(We know, Power= Energy/Time. Therefore, Energy = Power * Time
=1000W * 3600s
=3600000 Joules
=3.6 * 106 Joules Regards
Why don't we use Joule as commercial unit? How many Joule will make up 1kWh.