1
Voltage Gate
PASSDevice output type must match generator output.
120V required -> 120V/240V available
Yes, the DELTA Pro 3 can run a Sump Pump
This pairing clears the safety headroom. Required ~1297W running and 3889W surge; the DELTA Pro 3 is rated 4000W / 8000W.
Power Margin Analysis
4000W / 8000W Capacity Running 2703W headroom
1297W required
Surge 4111W headroom
3889W required
Decision Gate Waterfall
Same decision gates as the engine: voltage, running, surge. Runtime is shown as operational context.
2
Running Gate
PASSContinuous draw with safety buffer applied.
1,297W required -> 4,000W available (2,703W headroom)
Required 1,297W required
Available 4,000W
3
Surge Gate
PASSStartup peak with safety buffer applied.
3,889W required -> 8,000W available (4,111W headroom)
Required 3,889W required
Available 8,000W
3b
With Soft-Start
PASSAlternative startup path with reduced inrush.
1,750W required -> 8,000W available (6,250W headroom)
Required 1,750W
Available 8,000W
4
Runtime Insight
INFORuntime context only. It does not change the electrical compatibility verdict.
Continuous estimate: 2.5h
Device profile reference: up to 2h per day.
Power bars show required versus available output for each gate.
View full compatibility reportDecision Snapshot
Quick compatibility, required headroom, and model-specific context at a glance.
⚡
4000W
Running Power
🔋
4096Wh
Capacity
⏱️
~2.5h
Est. Runtime
☀️
2600W
Solar Input
Quick Compatibility Check
- 1 Running headroom: target 1297W; generator provides 4000W.
- 2 Surge headroom: target 3889W; generator provides 8000W.
- 3 Tip: leave headroom for startup spikes and warm conditions.
Model-Specific Results
3 of 3 models are SAFE or TIGHT. Most demanding model: Wayne CDU800 (1/2 HP) (3,381W surge).
| Model | Running | Surge | Verdict | Runtime | Source |
|---|---|---|---|---|---|
| Zoeller M98 Flow-Mate (1/2 HP) | 1,081W | 3,243W | Safe | ~2.7h | NEC Standard |
Show expert analysisTechnical: **Running load:** 1,081W (115V x 9.4A OEM rated). **Surge:** 3,243W at motor startup (3x NEC estimate). **Voltage:** 120V AC. The cast iron PSC motor draws heavy inrush current on every pump cycle. Field note: The Zoeller M98 is the industry reference in cast iron sump pumps. Its PSC motor has no built-in soft-start — the full inrush hits the power station instantly. An external soft-start device can reduce this surge, but size the inverter for the full 3,243W if running without one. Can I run a Zoeller M98 sump pump on a portable power station during a flood? Only if your power source can supply at least 1,081W continuous and 3,243W surge at 120V. The PSC motor creates a hard startup spike that will trip undersized inverters. | |||||
| Wayne CDU800 (1/2 HP) | 1,127W | 3,381W | Safe | ~2.5h | NEC Standard |
Show expert analysisTechnical: **Running load:** 1,127W (NEC 430.248 rated). **Surge:** 3,381W at motor startup (3x NEC estimate). **Voltage:** 120V AC. The coated steel PSC motor draws the highest inrush in this class due to its conservative NEC-rated amperage. Field note: The Wayne CDU800 is the Home Depot best-seller for suburban basements. Without OEM amperage data, specs are derived from NEC tables — the actual draw may be slightly lower, but sizing to NEC ensures safe headroom. Can I keep my Wayne sump pump running on battery backup during a storm? Only if your power source can supply at least 1,127W continuous and 3,381W surge at 120V. The motor startup surge is the critical factor — most small power stations cannot handle it. | |||||
| Liberty Pumps 287 VMF (1/2 HP) | 920W | 2,645W | Safe | ~3.1h | OEM Manual |
Show expert analysisTechnical: **Running load:** 920W (115V x 8.0A OEM rated). **Surge:** 2,645W at motor startup (115V x 23A LRA, OEM verified). **Voltage:** 120V AC. The 3450 RPM PSC motor with OEM-documented LRA provides the most precise surge data in this class. Field note: The Liberty 287 is the plumber's choice and the most battery-friendly 1/2 HP sump pump in this comparison. With OEM-verified LRA data, the 2,645W surge is a confirmed number — not an estimate. A 3,000W power station can handle this reliably. Is the Liberty 287 easier to run on a power station than other sump pumps? Only if your power source can supply at least 920W continuous and 2,645W surge at 120V. Its OEM-documented 23A locked rotor current is lower than NEC estimates for competing 1/2 HP pumps, making it more generator-friendly. | |||||
How This Pairing Performs Across Our Database
This unit ranks #14 of 17 compatible generators for this device by buffered margin (Overkill class).
How Sump Pump (1/2 HP) Performs Across 33 Tested Generators
17 of 33 generators are SAFE+TIGHT for Sump Pump (1/2 HP).
17
Safe+Tight
Safe 12 (36%)
Tight 5 (15%)
Soft Start 6 (18%)
Fail 10 (30%)
Power Comparison: EcoFlow DELTA Pro 3 vs Top Alternatives for Sump Pump (1/2 HP)
EcoFlow DELTA Pro 3 Safe Overkill
Current unit
Running 4,000W
Surge 8,000W
Fit class uses buffered needs (running and surge) for this device.
Specs & Surge Analysis
Emergency
Sump Pump (1/2 HP)
Storm Flood Prevention
Select Your Model:
1127W
Running
3381W
Surge
120V
Required
True Surge™ Analysis
Safety Buffer: +15% Running Power Usage 32% Utilization
1297W required 4000W Capacity
2703W headroom
Surge/Startup Peak 49% Utilization
3889W required 8000W Capacity
4111W headroom
Voltage Match 120V ↔ 120V/240V ✓
⚠️
Before You Buy: Connection Check
Installation warning
These systems are often hardwired to a home panel. To run them from a portable station, you may need a transfer switch installed by an electrician. You cannot just plug it in.
Compare Similar Units
Free Tools
Station Tools
Generator Insights
The 8000W surge rating can support typical compressor startup in residential air conditioners, well pumps, and refrigeration equipment. Most single-phase motor loads under 2HP can start on this surge budget. The 4000W continuous capacity can handle simultaneous operation of multiple circuits including HVAC blowers, lighting, and standard appliances during extended outages.
This unit provides 4096Wh of LFP battery capacity with 4000W continuous and 8000W surge output capability. Source: EcoFlow DELTA Pro 3 User Manual v1.1 (AC Output Specifications) (manufacturer documentation). The LFP chemistry offers thermal stability compared to older lithium-ion chemistries, though all battery systems require proper ventilation and adherence to installation guidelines.
Extend Runtime with Solar
Keep your Sump Pump (1/2 HP) running with solar • MPPT: 30– 150V • Max: 2600W
Official EcoFlow
400W Panel
1 Hour Sun =
+0.2h per sun hour
MC4 -> XT60
Full in ~14.6h Adapter required: MC4 -> XT60.
Smart Value Anker
400W Panel
1 Hour Sun =
+0.2h per sun hour
MC4 -> XT60
Full in ~14.6h Adapter required: MC4 -> XT60.
Smart Value Bluetti
350W Panel
1 Hour Sun =
+0.2h per sun hour
MC4 -> XT60
Full in ~16.7h Adapter required: MC4 -> XT60.
Technical Analysis
Spec-Based • No GuaranteesTechnical Breakdown
Running load: 920–1,127W depending on model. Surge: 2,645–3,381W at motor startup. Voltage: 120V AC required. All 1/2 HP sump pumps use PSC induction motors with significant startup inrush — the surge is the critical sizing factor for battery backup.
Expected Behavior
Estimated runtime: ~2.5h. Sump pumps activate automatically via float switch during flooding. Each motor start produces a surge lasting 1-3 seconds. Typical storm usage: 2 hours/day with intermittent cycling. Daily energy: 1,840–2,254 Wh.
Field Note
Sump pump backup is the #1 emergency use case for portable power stations. The motor startup surge — not the running watts — determines whether your power station can handle it. Check the surge rating, not just the wattage.
Frequently Asked Questions
Can the EcoFlow DELTA Pro 3 power a Sump Pump?
Yes. The EcoFlow DELTA Pro 3 provides 4000W running / 8000W surge. The Sump Pump (1/2 HP) needs 1297W / 3889W (including 15% buffer). That leaves 2703W of running headroom and 4111W of surge margin.
How long will the DELTA Pro 3 run a Sump Pump?
Approximately 2.5 hours, based on the Sump Pump (1/2 HP)'s 1127W draw and the DELTA Pro 3's 4096Wh capacity (70% usable after real-world losses).
What Else Can You Run?
With 990W allocated to the Sump Pump (1/2 HP), the DELTA Pro 3 still has ~1083W of margin. These devices could run simultaneously:
🔥
Space Heater (Eco)
750W
💡
LED Lamp
10W
🌀
Box Fan (Medium)
60W
📺
55' LED TV
80W
🖥️
24' Monitor
30W
🌬️
Nebulizer
60W
Storm Safety: Since the Sump Pump (1/2 HP) is critical for preventing flooding, we recommend testing this setup specifically before the storm season. Ensure the DELTA Pro 3 is fully charged to 100% as storms approach.
Compare all 33 generators for the Sump Pump (1/2 HP)
Ranked by budget, runtime, and overall compatibility.
Technical Sourcing & Verification
ID: ecoflow-delta-pro-3-sump-pump-half-hp 🏛️ Device Data Source
Engineering Est. Safety Factor Applied
Derived from variant list (max of variants). Worst case = Wayne CDU800 (1127W running, 3381W surge).
⚡ Generator Specs Source
OEM Verified
EcoFlow DELTA Pro 3 User Manual v1.1 (AC Output Specifications)
Methodology informed by US Department of Energy (DOE) & EIA references where applicable.
Our methodology →
Compare these models
Similar-output alternatives you can compare side by side.