kW to kWh Conversion
Suppose someone asked you: I'm driving at 60 miles per hour, how far have I gone? Obviously, there's not enough information; you have to know how long they've been driving at that speed. If it's a minute, they've gone one mile; if it's an hour, they've gone 60 miles.

Same think with kW and kWh: the first is the rate that you're using energy (this is called power), and the second is the amount of energy that you've used. The fact that the names are so similar can be confusing.