How long will the EcoFlow DELTA 3 run a well pump?

About 17 hours from a full charge. A well pump averages about 50 W (1,000 W running, on about 5% of the time), and the 1,024 Wh battery gives about 870 Wh after inverter losses. That is 5.7% of the battery an hour.

Will the EcoFlow DELTA 3 start a well pump?

Yes. It needs about 3,000 W for a moment when the pump starts, and the EcoFlow DELTA 3 is rated for 3,600 W surge, 1.2 times that. Avoid starting other motors at the same moment.

How much of the battery does a well pump use in a day?

About 1,200 Wh a day (50 W × 24 hours), more than the 870 Wh the EcoFlow DELTA 3 can deliver, so plan to recharge every 17 hours.

EcoFlow · Will it run?

Can the EcoFlow DELTA 3 run a well pump (1/2 HP)?

Published October 12, 2026

Short answerYes

Yes. The EcoFlow DELTA 3 runs a well pump for about 17 hours from a full charge. It needs about 3,000 W for a moment when the pump starts, within the 3,600 W surge rating, then about 1,000 W while running against 1,800 W continuous.

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Key numbers

Runtime: 17 hrs; from a full charge
Battery used per hour: 5.7%; at 50 W average

Well pump (1/2 HP)

Running: 1,000 W; 750–1400 W range
Start-up: 3,000 W
Average: 50 W; on 5% of the time

EcoFlow DELTA 3

Battery: 1,024 Wh; about 870 Wh usable
Output: 1,800 W; continuous
Surge: 3,600 W; start-up peak

How we worked it out: 1,024 Wh × 0.85 ÷ 50 W average (1,000 W × 0.05 duty) = about 17 hours. The 0.85 covers inverter and battery losses. We do not test units ourselves; the numbers come from the official spec sheets and typical device draws. How we pick

EcoFlow DELTA 3

1,024 Wh · 1,800 W output · 3,600 W surge · 27.6 lb

Full specs and runtimes

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What else the EcoFlow DELTA 3 runs

One device at a time, from a full charge.

Other power stations for a well pump

The nearest sizes that also run it.

Keep going

Real runtime depends on the model you own, room temperature and battery age. The 17 hours above is an estimate, not a measured result.

Common questions

How long will the EcoFlow DELTA 3 run a well pump?: About 17 hours from a full charge. A well pump averages about 50 W (1,000 W running, on about 5% of the time), and the 1,024 Wh battery gives about 870 Wh after inverter losses. That is 5.7% of the battery an hour.
Will the EcoFlow DELTA 3 start a well pump?: Yes. It needs about 3,000 W for a moment when the pump starts, and the EcoFlow DELTA 3 is rated for 3,600 W surge, 1.2 times that. Avoid starting other motors at the same moment.
How much of the battery does a well pump use in a day?: About 1,200 Wh a day (50 W × 24 hours), more than the 870 Wh the EcoFlow DELTA 3 can deliver, so plan to recharge every 17 hours.