Generator Sizing Calculator
Size a generator against a real motor starting sequence. Enter each motor in the order it starts, choose how it is started, and calculate the minimum generator required.
Enter each motor in the order it will be started. Motors started together can be summed and entered as one. The sizing is driven by the worst moment: the largest starting surge landing on top of everything already running.
| # | Motor rating | Start method | Run var | Phase current | Start value | Total run | Total start | Remove |
|---|
Minimum recommended generator
—kVA
To start the load
—kVA
To run the load
—kVA
Running load at 50%: — kVA
at 80%: — kVA
at 100%: — kVA
Estimate only. Site conditions, motor efficiencies and iron losses are not taken into account, and the figures assume an alternator that will accept 200% of rated current momentarily for starting. Confirm the final selection with our engineers.
HP horsepowerkW kilowatts
kVA kilovolt-ampsI current, amps
V voltsPF power factor
kW to kVA
—kVA
kVA to kW
—kW
kVA to amps
—amps
kW to HP
—HP
1 HP = 0.746 kW
HP to kW
—kW
Genset size to start one motor, DOL
—kVA
Direct on line, single motor, no other load running.
