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How many watts does a Sewage Ejector Pump (1/2 HP) use?
Running watts
1,050 W
Starting watts
2,150 W
Startup surge
+1,100 W
A Sewage Ejector Pump (1/2 HP) draws 1,050 watts continuously once it's running, but its motor needs a brief surge of up to 2,150 watts to start. A generator has to cover that starting surge, not just the running load, or the motor won't start. No manufacturer-published LRA found for sewage ejector pump motors (Zoeller and comparable brands publish FLA only) — this figure remains an estimate, not real nameplate data.
Running it 1 hour/day costs roughly $5.36/month at the U.S. average residential rate (~$0.17/kWh, early 2026, per the EIA) — real rates vary a lot by state and utility. Use your own rate in the House calculator →
△ No published nameplate LRA rating exists for this appliance class — starting watts here is a rough estimate, not real motor nameplate data. See the full LRA reference →
Generators that can run this
- Generac GP2200i1,700 W run · 2,200 W start · ~$550
- Honda EU2200i1,800 W run · 2,200 W start · ~$1,150
- WEN 56235i1,900 W run · 2,350 W start · ~$430
Prices as of July 2026 — check the current listing before buying.
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