EcoFlow DELTA 3 Ultra Plus Portable Power Station
SVT Score, Top
3,072 Wh station with 3,600 W out and 1,600 W of solar that grows to 11 kWh; testers drew 85-92 percent.
$1,514
We may earn a commission if you buy through this link. It never affects our scores. How this works
Usability
7.1 out of 10It stores 3,072 Wh, above the typical size for a large station, so it scores 7 on capacity; StorageReview drew 2,610 Wh of it, 85 percent of rated.
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 two inputs take 1,600 W of solar, so it scores 7 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 and takes EcoFlow's extra batteries up to 11 kWh, but its transfer switch bundle is unavailable, so it scores 7 on backup readiness.
SGS 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.
3 kWh That grows to 11, still 120 V only
The DELTA 3 Ultra Plus is EcoFlow's expandable 3 kWh LiFePO4 station on wheels, a 74.3 lb unit with a 30 A RV outlet.
It suits a buyer who wants 3 kWh on 120 V with room to grow and heavy solar, and who does not need 240 V. $1,514 at us.ecoflow.com.
What we like
- 1,600 W of solar over two inputs
- 3,600 W continuous output
- Expands to 11 kWh with extra batteries
- TT-30 outlet for RVs
- Switchover measured at 8.25 ms by StorageReview
What holds it back
- No 240 V output
- No published cycle rating
- 74.3 lb
- An overload shuts off only some outlets in two tests
- Last 2 warranty years need app registration
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 Input1,000-1,999 W
- Backup Switchover10 ms or less
- Warranty5 Years
- Expandable To10-19.9 kWh
- Weight74.3 lb
Not published by EcoFlow: rated cycles.
At a glance
- TT-30 RV outlet
- 30 A Anderson port
- Wheels, telescoping handle
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 Plus 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 30 A Anderson port, a 140 W USB-C port and two 45 W USB-C ports. EcoFlow states a full charge in 120 minutes from the wall at up to 1,800 W, and it takes up to 1,600 W of solar through two 800 W inputs. It switches to battery in under 10 ms and takes EcoFlow's extra batteries up to 11 kWh. It weighs 74.3 lb on wheels with a telescoping handle.
