EcoFlow DELTA 3 Ultra Portable Power Station
SVT Score, Mid
3,072 Wh station with a 3,600 W inverter and a TT-30 RV outlet that takes no extra battery.
$1,199
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Usability
6.8 out of 10It stores 3,072 Wh, above the typical size for a large station, so it scores 7 on capacity.
Its inverter is rated 3,600 W continuous and 7,200 W surge, so it scores 10 on power output.
EcoFlow states a full wall charge in 120 minutes and solar input tops out at 800 W, so it scores 6 on recharging.
EcoFlow publishes no cycle rating for it, only a design life of about 10 years, so it scores 4 on battery life.
Better on battery lifeEcoFlow DELTA ProEcoFlow rates the cells for 3,500 cycles to 80 percent capacity. $1,899Scores 6.0It switches to battery in under 10 ms, but takes no expansion battery and its transfer switch bundle is unavailable, so it scores 5 on backup readiness.
Better on backup readinessEcoFlow DELTA ProSwitches to battery within 30 ms. $1,899Scores 7.0SGS lists it to UL 2743 by model, so it scores 6 on verification.
EcoFlow's policy gives it 3 years plus 2 on registration in the app, so it scores 8 on warranty and support.
Its warranty runs 5 years on most stations, or 3 years plus 2 on registration, with returns within 30 days.
$1,199 at us.ecoflow.com, $315 below the expandable DELTA 3 Ultra Plus.
A 30 A RV outlet on 3 kWh, with nowhere to grow
The DELTA 3 Ultra is EcoFlow's 3 kWh LiFePO4 station on wheels, a 72.1 lb unit with a 30 A RV outlet.
It suits an RV owner on 30 A service who wants 3 kWh in one unit and will never add a battery.
What we like
- 3,600 W continuous output
- TT-30 outlet for RVs
- Full wall charge in 120 minutes
- 10 ms UPS switchover
- UL 2743 listing by model in SGS's directory
What holds it back
- No expansion battery
- Solar input capped at 800 W
- No published cycle rating
- 72.1 lb
- Took a 1,000 W array on its 800 W input without cutting out, in TheSolarLab's test
What you’re getting
- Capacity3,000-3,999 Wh
- AC Output3,000-3,999 W
- Output Voltage120 V only
- Battery ChemistryLiFePO4
- Safety ListingUL 2743 listed
- Solar Input600-999 W
- Backup Switchover10 ms or less
- Warranty5 Years
- Expandable ToNot expandable
- Weight72.1 lb
Not published by EcoFlow: rated cycles.
At a glance
- TT-30 RV outlet
- Wheels, telescoping handle
- 140 W USB-C port
EcoFlow Technology, Inc. is EcoFlow's US company and is owned by Shenzhen EcoFlow Innovation Technology, a private firm founded in 2017.
It sells direct from us.ecoflow.com and through Amazon US, Costco, Home Depot, Lowe's and marketplace stores at Best Buy and Walmart.
The EcoFlow DELTA 3 Ultra is a 3,072 Wh LiFePO4 station rated 3,600 W continuous and 7,200 W surge at 120 V from four 20 A outlets and a 30 A TT-30 outlet, with a 140 W USB-C port, two 45 W USB-C ports and a 126 W car port. EcoFlow states a full charge in 120 minutes from the wall at up to 1,800 W, and it takes up to 800 W of solar through one input. It switches to battery in under 10 ms but takes no expansion battery. It weighs 72.1 lb on wheels with a telescoping handle.
