Running a sump pump on backup power
The short answer
A sump pump uses about 700–1,500 watts while running , and needs up to 4,500 watts for a split second when it starts. Over 24 hours it uses roughly 840–12,600 watt-hours.
Buy for the higher number in each range. 48 of the 58 products we track can run it. For example, the Zendure SuperBase V6400 would run it for 3.6–7.8 hours.
This one is not plug-and-play. It is wired into your house, so you need a licensed electrician.
Sized in a full plan
This load is part of a plan we ran against every unit we track, with picks: The best portable power stations for a sump pump.
The numbers behind that
Duty cycle here is driven entirely by how much water is arriving. In a dry spell it is near zero; during the storm that caused the outage it can run far more than the high end of this band.
What it draws while it is actually on.
The momentary surge when a motor or compressor kicks in. Undersized systems fail here, not on running watts.
How much of the hour it is actually drawing power. This is what turns running watts into energy.
Multiply the battery capacity you are considering by roughly 0.85 to compare like with like.
Wired into the building
This is connected to your house wiring, not an outlet. Powering it from a portable source needs a transfer switch or an inlet installed by a licensed electrician. Never run a cord from a generator into an outlet to feed a circuit: backfeeding can kill line workers and start fires.
Safety
Sizing a sump pump for backup power is a flood-risk decision, not a comfort decision. The starting surge is large relative to the running watts, and that surge is what most undersized systems fail on.
Check this yourself
Read the pump's horsepower and nameplate amps.
What can run it
Sized for 24 hours of use during a 24-hour outage, using the higher end of the range.
| Product | Continuous | Surge | Runtime | Verdict |
|---|---|---|---|---|
| Zendure SuperBase V6400 | 3,800W | 5,000W | 3.6–7.8h | Might work |
| Jackery Explorer 5000 Plus Portable Power Station | 7,200W | 14,400W | 2.9–6.1h | Might work |
| Zendure SuperBase V4600 | 3,800W | 5,000W | 2.6–5.6h | Might work |
| EcoFlow DELTA Pro 3 Portable Power Station | 4,000W | 8,000W | 2.3–5.0h | Might work |
| Goal Zero Yeti PRO 4000 | 3,600W | 7,200W | 2.3–4.8h | Might work |
| Champion 201444 5500W Inverter | 4,000W | 5,500W | fuel-dependent | Will work |
| Champion 201255 5500W Open Frame Inverter (CARB) | 4,000W | 5,500W | fuel-dependent | Will work |
| Champion 201254 5500W Dual Fuel Open Frame Inverter (CARB) | 4,000W | 5,500W | fuel-dependent | Will work |
What will not work, and why
7 of 58 products cannot run this.
- Jackery Explorer 600 v2 — Continuous output is 500W. Your selected loads draw at least 700W running together, so this unit cannot run them even in the best case.
- BLUETTI AC50B Portable Power Station — 381Wh usable cannot cover a 24-hour outage for these loads, which need 840–12,600Wh. It would carry the plan for roughly 0.3h before recharging.
- Jackery Explorer 300D — Continuous output is 140W. Your selected loads draw at least 700W running together, so this unit cannot run them even in the best case.
- Anker SOLIX Anker SOLIX C300 Portable Power Station - 288Wh | 300W — Continuous output is 300W. Your selected loads draw at least 700W running together, so this unit cannot run them even in the best case.
- Jackery Explorer 300 v2 Portable Power Station — Continuous output is 300W. Your selected loads draw at least 700W running together, so this unit cannot run them even in the best case.
- EcoFlow RIVER 3 Plus — Continuous output is 600W. Your selected loads draw at least 700W running together, so this unit cannot run them even in the best case.