Wh to kW calculation formula
P(kW) = E(Wh) / (1000 × t(h))
The power P in kilowatts (kW) is equal to the energy E in watt-hour (Wh), divided by 1000, multiplied by the time period t in hours (h).
kW = Wh / (1000 x h)
kilowatt = watt-hour / (1000 x hour)
Energy (E) = 900Wh
Time period (t) = 2h
Power (P) = 900Wh / (1000 x 2h) = 0,45kW