EcoFlow DELTA 3 Max: Runtime & Specs

The EcoFlow DELTA 3 Max is a 2,048 Wh LiFePO4 power station with 2,400 W of continuous AC output and a 4,800 W surge rating. It runs a typical full-size fridge for about 30 hours.

Capacity2,048 WhLiFePO4

Output2,400 W4,800 W surge

Solar input500 W11–60 V

Weight44.8 lbnot expandable

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How long will the DELTA 3 Max 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 3 Max
Device	Avg draw	Runtime
LED light bulb	9 W	8.1 days
Phone charging	10 W	7.7 days
Wi-Fi router + modem	15 W	4.8 days
Laptop	50 W	35 hours
CPAP + humidifier	30 W	2.4 days
CPAP with heated humidifier + humidifier	60 W	29 hours
Starlink Standard	90 W	19 hours
TV	100 W	17 hours
Mini fridge	29 W	2.5 days
Refrigerator	58 W	30 hours
Chest freezer	29 W	2.5 days
Sump pump (1/3 HP)	160 W	11 hours
Sump pump (1/2 HP)	210 W	8.3 hours
Window AC	225 W	7.7 hours
Drip coffee maker	1,000 W	1.7 hours
Microwave	1,500 W	1.2 hours
Space heater	750 W	2.3 hours
Well pump	33 W	Needs 240 V

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.

What the DELTA 3 Max can't power

Well pump (1/2 HP submersible): needs 240 V

Solar charging time

Hours of good sun to charge from empty, assuming panels deliver 75% of their rating.

Panels	Power in	Hours of sun
100 W of panels	75 W	27 hours
200 W of panels	150 W	14 hours
400 W of panels	300 W	6.8 hours
500 W of panels	375 W	5.5 hours

Check panel voltage and wiring with the solar charging calculator.

Full specifications

Battery capacity	2,048 Wh
Battery chemistry	LiFePO4 (LFP)
Continuous AC output	2,400 W
Surge (peak) output	4,800 W
X-Boost (heating devices)	3,400 W
AC voltage	120V
AC outlets	4
USB-C ports	3 (up to 100 W)
USB-A ports	1
12 V car outlet	Yes
Max solar input	500 W
Solar voltage range	11–60 V
Solar max current	13 A
Max AC charging power	1,800 W
AC charging time (maker claim)	0–80% in 68 min
Expandable	No
UPS / EPS switchover	10 ms
Cycle life	—
Weight	44.8 lb
Warranty	5 years

Notes: Not expandable (no extra-battery port in manual; absent from EB compatibility list). 1×100W + 2×30W USB-C. Cycle life unpublished. Manual via Home Depot CDN. Warranty 3 yr + 2 yr w/ app.

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 3 Max run a refrigerator?

About 30 hours 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 3 Max run a microwave?

Yes. A typical 1,000 W microwave pulls about 1,500 W from the outlet, within its 2,400 W continuous output. A full battery gives about 1.2 hours of cooking.

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

EcoFlow's published charging claim: “0–80% in 68 min”. Max AC charging power is 1,800 W. With solar, it accepts up to 500 W. With 500 W of panels that's roughly 5.5 hours of good sun from empty.

Is the EcoFlow DELTA 3 Max expandable?

No. Its capacity is fixed at 2,048 Wh.

Does the EcoFlow DELTA 3 Max 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.