Pump
1/2 hp sump pump running watts and starting watts
Use these values as a planning range only. The conservative default for 1/2 hp sump pump is 1,050 W running and 2,200 W starting.
| Load type | Low | Default | High |
|---|---|---|---|
| Running watts | 800 W | 1,050 W | 1,500 W |
| Starting watts | 1,800 W | 2,200 W | 3,200 W |
Source note
Pump manufacturer nameplates and DOE reminder to verify actual labels; default covers many 1/2 hp residential sump pumps.
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.
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