Can the EcoFlow DELTA 2 Max Run a Sump Pump (1/3 HP)?
Yes. With 2,048Wh of LiFePO4 battery capacity (1,741Wh usable after 85% AC inverter conversion) and a 2400W continuous / 4800W surge pure sine wave inverter, the EcoFlow DELTA 2 Max should run a Basement Sump Pump (1/3 HP Submersible) for approximately 13.6 hrs on a single charge.
- Usable Watt-Hours: The EcoFlow DELTA 2 Max holds 2048Wh, which yields about 1741Wh of 120V AC power, assuming ~15% DC-to-AC inverter loss.
- Sump Pump (1/3 HP) Duty Cycle: While active, a Sump Pump (1/3 HP) pulls 800W (with a 1800W startup spike). Over a multi-hour period, its 15% duty cycle averages ~120W per hour (plus ~8W inverter standby overhead).
- Tip: Sump pumps are all about STARTING SURGE. A 1/3 HP pump draws 800W while pumping, but demands 1,600W–2,000W for a split second to spin up the impeller against water pressure. Never use a power station rated below 1,800W continuous / 2,400W+ surge.
Compare With an Alternative
EcoFlow DELTA 2 Max
Multi-day fridge + freezer, sump pumps, window AC & power tools
2,048Wh with a 2,400W inverter (4,800W surge) and up to 1,000W of solar input. At about 50 lbs it's the lightest 2kWh unit on our list, and it expands to 6,144Wh.
- 2,400W continuous / 4,800W surge for motor loads like sump pumps
- Up to 1,000W solar input
- Expandable to 6,144Wh with two extra batteries
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Jackery Explorer 2000 Plus
Well pumps, sump pumps, power tools & modular whole-home expansion
The highest-output 2kWh unit on our list: 3,000W continuous and 6,000W surge, on wheels, with expansion to about 12kWh using add-on battery packs.
- 3,000W continuous / 6,000W surge, the highest in the 2kWh class on our list
- Up to 1,400W solar input
- Rated 4,000 cycles to 70% capacity
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Inexpensive Add-Ons for Running a Sump Pump (1/3 HP) on Battery
Warns you early if water starts rising before the battery or pump gives out.
Measures what your appliance actually draws, so you size from real numbers instead of estimates.
Lets the power station sit where it's convenient without voltage drop on motor loads.
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