kWh to watts calculation formula
P(W) = 1000 x E(kWh) / t(h)
The power P in watts (W) is equal to 1000, multiplied by the energy E in kilowatt-hours (kWh), divided by the consumption time period t in hours (h).
W = 1000 x kWh / h
watt = 1000 x kilowatt-hour / hour
Energy (E) = 10kWh
Time period = 4 hours
Power (P) = 1000 x 10kWh / 4h = 2500W