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Would that be to maintain temperatures for growing bananas, or for keeping feet warm?

Check: http://www.wolframalpha.com/input/?i=kwh

And then: http://www.wolframalpha.com/input/?i=watt

in each case, look at the section labeled "basic unit dimensions"

Now, can you tell whether kwh means kw * h or kw / h

its an amount , not bound to any time period.

you can use 50 killowatt hours in 1 sec or in ten years.

for instance the (kWh) time period can be used to determine how long a appliance can operate off of a stored 50 kWh of power.

a refrigerator that uses 280 watts.

would use 280 watts each hour.

how many HOURS could you operate the refrigerator using a 50kWh battery.
50,000 watts / 280 watts (per hour TFF) = 178 hours


if you had an appliance that uses 180,000,000 watts
you could only power that appliance for 1 second with
50 kWh of stored power.