Power Calculators Guide to Standard Units kVA = Kilo Volt Amperes kW = KiloWatts (1000 watts = 1 kW) I = Ampere (Volt-Amperes or Current) E = Volts PE = Power Factor %EFF = Percent Efficiency HP = Horse Power Power Requirement Calculator Phase 1 3 Volts Required (V) Amperes (I) Power Factor .8 1.0 Converting kW to kVA kW kVA Converting kVA to kW kVA kW Converting kW to HP kW HP Genset size needed* HP of Generator kVA Calculating Amperes (when you know kVA) Phase 1,2,3 Generator (kVA) Volts Required Ampere (I) *What size genset is needed to start a 3 phase electric motor Direct on Line (DOL) start?