- Minimum requirement: 2,000W continuous, 4,000W+ surge, eco-mode can be disabled
- EcoFlow Delta 2 Max is the top pick for 1/2 HP pumps - best surge rating in class
- EcoFlow Delta 2 handles most 1/3 HP pumps at a lower price point
- Eco-mode must be disabled or the station shuts off between pump cycles
- Set up in permanent UPS pass-through mode - not as an emergency device you connect during storms
The EcoFlow Delta 2 Max is the top pick for sump pump backup - 5,000W surge, 2,048Wh, eco-mode disableable, 20ms UPS switchover. For a 1/3 HP pump the standard Delta 2 handles the load at lower cost. Both require eco-mode disabled and UPS mode enabled.
How We Ranked These
Three criteria, in order of importance:
- Surge rating - must clear 4,000W for 1/3 HP pumps, 5,000W+ for 1/2 HP
- Eco-mode can be fully disabled - must stay on during idle periods between pump cycles
- Pure sine wave inverter - all recommended units qualify; this eliminated some budget options
Capacity and price came after these three. A cheap station with inadequate surge is worthless for this application.
The Delta 2 Max is our top pick for homes with a 1/2 HP submersible pump (the most common residential size). The 5,000W surge clears the 1/2 HP startup spike with headroom to spare. At 2,048Wh capacity it runs the pump through a multi-day storm event while also handling lights and phone charging. Eco-mode is fully disabled in the app. The 20ms UPS switchover means the pump never experiences a power interruption when the grid fails - it transitions seamlessly to battery.
For homes with a standard 1/3 HP sump pump, the Delta 2 handles the job at a meaningfully lower price than the Max. The 5,000W surge is identical - the difference is 1,024Wh vs 2,048Wh capacity, which translates to roughly 11 hours vs 22 hours of pump backup (assuming typical cycling at ~80W average). For most outage scenarios, 11 hours is sufficient. The 20ms switchover and full eco-mode disable make this the best value option for 1/3 HP installations.
The Explorer 1000 Plus qualifies for sump pump use with its 4,000W surge rating and reliable eco-mode control through the Jackery app. It's the entry point for Jackery users who want sump pump coverage. Note the 4,000W surge is tighter than EcoFlow's 5,000W - it handles standard 1/3 HP pumps comfortably but may be borderline on older or higher-HP pumps with aggressive startup characteristics. When in doubt, choose the Delta 2 for more surge headroom.
Setup Instructions
Plug the power station into the wall. Plug the sump pump into the power station. Enable pass-through charging mode. Disable eco-mode. Done. The station now sits transparently between the grid and the pump - when power fails, it switches to battery in under 30ms with no interruption.
Do not store the power station in a closet and plan to deploy it during a storm. By the time you realize the power is out and the basement is filling, it's often too late to set it up properly. The permanent installation is the only reliable setup.
Frequently Asked Questions
What is the best portable power station for a sump pump?
The EcoFlow Delta 2 Max is the top recommendation for 1/2 HP pumps - 5,000W surge, 2,048Wh capacity, eco-mode fully disableable, 20ms UPS switchover. For 1/3 HP pumps the EcoFlow Delta 2 at 1,024Wh handles the job at a lower price. The Jackery Explorer 1000 Plus covers most 1/3 HP pumps with a 4,000W surge rating.
How much capacity do I need for sump pump backup?
A 1/3 HP sump pump draws roughly 80W average including cycling. A 1,024Wh station provides approximately 10-12 hours of pump backup. A 2,048Wh station provides 20-24 hours. For storms expected to last multiple days, pair the station with a 200W solar panel for continuous recharging.
Does the EcoFlow Delta 2 work for sump pump backup?
Yes. The EcoFlow Delta 2 has a 5,000W surge rating - well above the 2,000-3,000W surge of a standard 1/3 HP sump pump. Eco-mode is fully disableable in the EcoFlow app. The 20ms UPS switchover means the pump never experiences an interruption when grid power fails.
How long will a power station run a sump pump?
A standard 1/3 HP sump pump draws approximately 800W running and cycles on for 1-3 minutes every 15-30 minutes in moderate conditions. Average consumption is roughly 80-150W. A 1,000Wh station provides 6-12 hours depending on how frequently the pit fills.