Answer:
Watts or kilowatts are units for measuring power. Specialy by alternating electric curent Watt is only for the resistive component.
No power loss occurs in a ideal inductor or capacitor.
The curent for an given power is minimal when V an I are in fase, when fi is 0, and the powerfactor cos fi is 1.
The generator power is P (VA) = V*I
The active power is Pa (W) = V*I*cos fi
The reactive component Pr (VA) = V*I*sin fi
(see related question)