Question: what is the difference between watt and watt hour?
Answer: In a nutshell, watt-hours measure amounts of energy for a specific period of time, and watts measure rates of power at a moment in time. A common analogy for watts and watt-hours is speed and distance. ... Similarly, if a 60 W light bulb is on for one hour, then that light bulb will have used 60 Wh of energy.