Isici samandla (PF) isilinganiso samandla okusebenza, akalwa ngama-kilowatts (kW), kuya kumandla abonakalayo, akalwa ngama-kilovolt amperes (kVA). Amandla abonakalayo, abuye aziwe ngokuthi isidingo, isilinganiso senani lamandla asetshenziswa ukuqhuba imishini nezinto zokusebenza ngesikhathi esithile. Itholakala ngokuphindaphinda (kVA = V x A)