Watts to Wh calculation formula
E(Wh) = P(W) × t(h)
The energy E in watt-hours (Wh) is equal to the power P in watts (W), multiplied by the time period t in hours (h).
So,
Wh = W × h
watt-hour = watt × hour
For example:
Power (P) = 250W
Time period (t) = 5h
Energy (E) = 250W x 5h = 1250Wh
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