How Electric Power is Measured in Watts
Kilowatt (kW) = 1,000 Watts
Megawatt (MW) = 1,000,000 Watts
So what is a kWh?
Lets say you have a 100 watt light bulb and you run it for one hour, at that point you have consumed 100 watt hours and if you run that light bulb for 10 hours you would have used 1 kWh.
1,000 watt hours = Kilowatt Hour (kWh)
1,000,000 watt hours = Megawatt Hour (MWh)
For example, If you purchased a Sanyo 1.0 kW solar power system and lived in Los Angeles which has average sun hours of 5.5 per day, the system would produce 5.5 kWh per day depending on the pitch, orientation, possible shading issues and other variables.