1
Voltage Gate
PASSDevice output type must match generator output.
120V required -> 120V/240V available
Yes, the Delta Pro Ultra can run a Sump Pump
Yes - Delta Pro Ultra has enough running and surge power for the Sump Pump (1/2 HP). Target ~1297W running / 3889W surge; the generator provides 6000W / 12000W.
Power Margin Analysis
6000W / 12000W Capacity Running 4703W headroom
1297W required
Surge 8111W 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 -> 6,000W available (4,703W headroom)
Required 1,297W required
Available 6,000W
3
Surge Gate
PASSStartup peak with safety buffer applied.
3,889W required -> 12,000W available (8,111W headroom)
Required 3,889W required
Available 12,000W
3b
With Soft-Start
PASSAlternative startup path with reduced inrush.
1,750W required -> 12,000W available (10,250W headroom)
Required 1,750W
Available 12,000W
4
Runtime Insight
INFORuntime context only. It does not change the electrical compatibility verdict.
Continuous estimate: 3.8h
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.
⚡
6000W
Running Power
🔋
6144Wh
Capacity
⏱️
~3.8h
Est. Runtime
☀️
5600W
Solar Input
Quick Compatibility Check
- 1 Running headroom: target 1297W; generator provides 6000W.
- 2 Surge headroom: target 3889W; generator provides 12000W.
- 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 | ~4.0h | 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 | ~3.8h | 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 | ~4.7h | 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 #16 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 Ultra vs Top Alternatives for Sump Pump (1/2 HP)
EcoFlow Delta Pro Ultra Safe Overkill
Current unit
Running 6,000W
Surge 12,000W
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 22% Utilization
1297W required 6000W Capacity
4703W headroom
Surge/Startup Peak 32% Utilization
3889W required 12000W Capacity
8111W 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.
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Generator Insights
With 12000 watts of surge capacity, this system can handle typical startup loads for central air compressors, well pumps, and other motor-driven equipment common in residential settings. The 6000-watt continuous rating supports sustained operation of multiple high-draw appliances simultaneously. The 6144 Wh capacity provides meaningful runtime for essential circuits during grid outages.
This unit uses lithium iron phosphate (LFP) chemistry, known for stable thermal behavior in stationary storage applications. The system is designed with internal protections typical of grid-tied and off-grid battery platforms. Source: EcoFlow DELTA Pro Ultra User Manual (manufacturer documentation).
Extend Runtime with Solar
Keep your Sump Pump (1/2 HP) running with solar • MPPT: 80– 450V • Max: 5600W
Official EcoFlow
400W Panel
1 Hour Sun =
+0.2h per sun hour
Plug & Play
Full in ~21.9h 
Smart Value Anker
400W Panel
1 Hour Sun =
+0.2h per sun hour
Plug & Play
Full in ~21.9h 
Smart Value Bluetti
350W Panel
1 Hour Sun =
+0.2h per sun hour
Plug & Play
Full in ~25.1h 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: ~3.8h. 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 Ultra power a Sump Pump?
Yes. The EcoFlow Delta Pro Ultra provides 6000W running / 12000W surge. The Sump Pump (1/2 HP) needs 1297W / 3889W (including 15% buffer). That leaves 4703W of running headroom and 8111W of surge margin.
How long will the Delta Pro Ultra run a Sump Pump?
Approximately 3.8 hours, based on the Sump Pump (1/2 HP)'s 1127W draw and the Delta Pro Ultra's 6144Wh capacity (70% usable after real-world losses).
What Else Can You Run?
With 1965W allocated to the Sump Pump (1/2 HP), the Delta Pro Ultra still has ~1708W of margin. These devices could run simultaneously:
📺
55' LED TV
80W
💡
LED Lamp
10W
🌀
Box Fan (Medium)
60W
🔥
Space Heater (Eco)
750W
🥪
Microwave (Running)
1000W
💻
MacBook Air/Pro
65W
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 Ultra 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-ultra-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 Ultra User Manual
Methodology informed by US Department of Energy (DOE) & EIA references where applicable.
Our methodology →
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