Update: I am actually searching for really simple, intuitive ways to explain it. I have a background in engineering, but am struggling to explain why we “pay for kwh”, and not kw (on our electricity bill) to someone who doesn’t. I have tried in many ways but maybe I’m not giving the right examples or making the right comparisons. I am really searchig for a way to ELI5.
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W is watt its a measure of power E/t energy per time often expressed is J/s.
KW is a kilowatt its a 1000 watts.
KWh is a measure of energy, if power is P = E/t then P×t = E×t / t = E. So J/s × s = J. 1 KW is 1000 J/s and 1000 J/s × 3600s (1h) = 3 600 000 J of energy. If your electric device consumes 500 W of power in 2 hours it would have consumed 1 KWh of energy.
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