Pump
1/3 hp sump pump running watts and starting watts
Use these values as a planning range only. The conservative default for 1/3 hp sump pump is 800 W running and 1,800 W starting.
| Load type | Low | Default | High |
|---|---|---|---|
| Running watts | 600 W | 800 W | 1,100 W |
| Starting watts | 1,300 W | 1,800 W | 2,400 W |
Source note
Pump manufacturer nameplates commonly show high locked-rotor starting demand; default is conservative for a 1/3 hp sump pump.
Never operate a fuel-burning generator indoors, in a garage, on a porch, or near open windows. Use a listed transfer switch or interlock installed by a qualified electrician for home wiring, and verify actual device nameplates before buying equipment.
Related calculator pages
- Will a 1000 watt generator run garage door opener, sump pump, and lights?
- Will a 1500 watt generator run garage door opener, sump pump, and lights?
- Will a 2000 watt generator run garage door opener, sump pump, and lights?
- Will a 2500 watt generator run garage door opener, sump pump, and lights?
- Will a 3000 watt generator run garage door opener, sump pump, and lights?
- Will a 3500 watt generator run garage door opener, sump pump, and lights?
- Will a 4000 watt generator run garage door opener, sump pump, and lights?
- Will a 5000 watt generator run garage door opener, sump pump, and lights?
- Will a 6500 watt generator run garage door opener, sump pump, and lights?
- Will a 7500 watt generator run garage door opener, sump pump, and lights?