What is a kWh (kilo-Watt hour)?
-In simplest terms, a kWh is a unit of measure that is 1000 (kilo) multiplied by Volt * Amps (Watt) multiplied by time (hour). Most appliances show how many Watts they consume when on. This is instantaneous power consumption! It’s like seeing a stream of water that is flowing past you at 5 gallons/minute. That is the instantaneous flow rate. If you want to know how much water flowed past you, you need to multiply the flow rate by how long you watched the water flow past. So we have the same situation with electricity. The Watt is an instantaneous power consumption rate. If you want to know total power consumption (kWh) you need to multiply power consumption rate by how long something was consuming power!
