EcoFlow DELTA Pro 3: Runtime & Specs

By Hicham M. · Specs from EcoFlow's published documents, as of September 2026 · How we calculate

The EcoFlow DELTA Pro 3 is a 4,096 Wh LiFePO4 power station with 4,000 W of continuous AC output and a 8,000 W surge rating, including 240 V. It runs a typical full-size fridge for about 2.5 days.

Capacity4,096 WhLiFePO4

Output4,000 W8,000 W surge

Solar input2,600 W30–150 V

Weight113.5 lbexpands to 12,288 Wh

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Simulated runtimes (not measured)

Nobody tested this unit for this page. These figures come from a computer simulation of the DELTA Pro 3, and they are estimates. The plain runtime table below divides energy by average draw at 85% efficiency. The simulation also charges the battery for the power the inverter burns just by being switched on, which is why small loads come out shorter. Where we have measured a unit, the measurement is shown separately and labeled as measured.

Simulated runtimes for the EcoFlow DELTA Pro 3
Device	Spec-sheet math	Simulated, typical	Likely range	Simulated at 0 °C
Wi-Fi router + modem	9.7 days	3.3 days	2.7 days to 4.3 days	2.7 days
CPAP (no humidifier)	4.8 days	2.5 days	2.1 days to 3 days	2.1 days
Starlink Standard	39 hours	30 hours	28 hours to 33 hours	26 hours
Refrigerator (full-size, ENERGY STAR)	2.5 days	42 hours	36 hours to 47 hours	35 hours

Nonstop runtime from full to battery cutoff. Likely range = middle 80% of 200 simulated runs with the uncertain inputs varied. The inverter idle draw is assumed, not published: we assumed about 32 W for this model, varied from 19 to 48 W. If the real figure is lower, real runtimes land closer to the spec-sheet column.

How this was simulated

The battery is stepped down every 2 minutes until it reaches cutoff, for 200 runs per device. Results are seeded, so the page shows the same numbers on every build.
Battery draw = load + inverter idle draw + 4–8% of the load + a loss that rises with load squared (4% at full output).
Usable capacity = 92–98% of rated Wh, for protection cutoff and aging.
At 0 °C, 80–90% of that capacity is assumed available.
Fridges cycle on and off every 30–50 minutes at the share of the time set by their average draw. The inverter idle draw continues while the compressor is off.
Devices that exceed this model's output or surge rating are left out. Loads are US 120 V devices.

These ranges are assumptions about a typical unit. They are not manufacturer figures for the EcoFlow DELTA Pro 3. How we calculate · How we use AI

How long will the DELTA Pro 3 run your appliances?

Nonstop runtime for one device at a time, using typical US wattages and 85% inverter efficiency. Devices marked ✕ can't run on this model.

Estimated runtime by appliance for the EcoFlow DELTA Pro 3
Device	Avg draw	Runtime
LED light bulb	9 W	16.1 days
Phone charging	10 W	15.4 days
Wi-Fi router + modem	15 W	9.7 days
Laptop	50 W	2.9 days
CPAP (no humidifier)	30 W	4.8 days
CPAP with heated humidifier	60 W	2.4 days
Starlink Standard	90 W	39 hours
TV	100 W	35 hours
Mini fridge	29 W	5 days
Refrigerator	58 W	2.5 days
Chest freezer	29 W	5 days
Sump pump (1/3 HP)	160 W	22 hours
Sump pump (1/2 HP)	210 W	17 hours
Window AC	225 W	15 hours
Drip coffee maker	1,000 W	3.5 hours
Microwave	1,500 W	2.3 hours
Space heater	750 W	4.6 hours
Well pump	33 W	4.4 days

Fridges, freezers, pumps and AC units cycle on and off, so we use their average draw. Want a mix of devices on a schedule? Use the runtime calculator.

The DELTA Pro 3 in action

EcoFlow's own video, so expect a sales pitch. It loads from YouTube only when you press play.

**EcoFlow DELTA Pro 3**Official video from EcoFlow, plays from YouTube

What the DELTA Pro 3 can't power

Every appliance in our wattage chart is within its output limits.

Solar charging time

Hours of good sun to charge from empty, assuming panels deliver 75% of their rating and one array per 1,600 W solar input.

Panels	Power in	Hours of sun
100 W of panels	75 W	55 hours
200 W of panels	150 W	27 hours
400 W of panels	300 W	14 hours
1,600 W of panels	1,200 W	3.4 hours
2,600 W of panels (split across inputs)	1,950 W	2.1 hours

Check panel voltage and wiring with the solar charging calculator.

Full specifications

Battery capacity	4,096 Wh
Amp-hours at 12 V (converted) How we convert	341 Ah (320 Ah at 12.8 V)
Battery pack voltage	51.2 V (80 Ah at this voltage)
Battery chemistry LFP vs NMC	LiFePO4 (LFP)
Continuous AC output	4,000 W
Surge (peak) output	8,000 W
X-Boost (heating devices)	6,000 W
AC voltage	120V/240V
AC outlets	7
USB-C ports	2 (up to 100 W)
USB-A ports	2
12 V car outlet	No
Max solar input	2,600 W (1,600 W per input)
Solar voltage range	30–150 V
Solar max current	15 A
Max AC charging power	—
AC charging time (maker claim)	—
Expandable	Yes, up to 12,288 Wh
UPS / EPS switchover What this means	10 ms
Cycle life What this means	4,000 cycles (to 80%)
Weight	113.5 lb
Warranty	5 years

Notes: Solar fields = High-PV; Low-PV 11–60V/20A/1000W. 12,288Wh w/ 2 DP3 EB. AC in 100–240V 15A (W not stated). No car socket (DC5521+Anderson). 0–80%/50 min claim is multi-charge.

Specs from EcoFlow's published documents, as of September 2026. Found an error? Tell us.

Sources

Similar power stations

Questions

How long will the EcoFlow DELTA Pro 3 run a refrigerator?

About 2.5 days for a typical ENERGY STAR full-size fridge averaging 58 W, assuming 85% inverter efficiency. Older or larger fridges use more. Try your own numbers.

Can the EcoFlow DELTA Pro 3 run a microwave?

Yes. A typical 1,000 W microwave pulls about 1,500 W from the outlet, within its 4,000 W continuous output. A full battery gives about 2.3 hours of cooking.

How many amp-hours is the EcoFlow DELTA Pro 3?

The EcoFlow DELTA Pro 3 works out to about 341 Ah at 12 V, or 320 Ah at 12.8 V, the nominal voltage of a 12 V LiFePO4 battery. Both are our conversion of EcoFlow's 4,096 Wh rating: amp-hours = watt-hours ÷ volts. EcoFlow's manual lists the battery itself as 80 Ah at 51.2 V, the same energy at a higher voltage. For scale, a 12 V 100 Ah LiFePO4 battery holds 1,280 Wh, so this model holds about as much as 3.2 of them. How we convert amp-hours.

How long does the EcoFlow DELTA Pro 3 take to charge?

EcoFlow doesn't publish an AC charging time for it. With solar, it accepts up to 2,600 W (1,600 W per input). With 2,600 W of panels that's roughly 2.1 hours of good sun from empty.

Is the EcoFlow DELTA Pro 3 expandable?

Yes, up to 12,288 Wh with EcoFlow's extra batteries.

Does the EcoFlow DELTA Pro 3 work as a UPS?

EcoFlow lists a 10 ms switchover time, so it can keep devices like routers and computers running when the power drops. Check that your specific device tolerates the switch before relying on it for anything critical.