EcoFlow DELTA Pro Ultra Home Backup Power System
SVT Score, Upper
6 kWh modular home system with 7,200 W at 240 V and a 0 ms online mode, growing to 30 kWh per inverter.
$4,199
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Usability
8.3 out of 10It stores 6,144 Wh per battery, so it scores 10 on capacity; HOBOTECH drew 5,390 Wh of it on AC, 88 percent of rated.
Its inverter supplies 7,200 W continuous and 10,800 W surge at 120/240 V, so it scores 10 on power output.
TheSolarLab timed a 120 V charge at just over four hours, though solar input reaches 5,600 W, so it scores 4 on recharging.
Better on rechargingEcoFlow DELTA Pro Ultra XEcoFlow states 80 percent in about an hour on 12 kW of AC input. $7,714Scores 10.0EcoFlow rates the battery for 3,500 cycles to 80 percent capacity, so it scores 6 on battery life.
It offers a 0 ms online mode, expands to 30 kWh per inverter and connects to EcoFlow's Smart Home Panel 2 at 240 V, so it scores 10 on backup readiness.
SGS lists the system to UL 9540 and the battery to UL 1973 by model, so it scores 8 on verification.
EcoFlow's policy gives the inverter and battery 5 years, 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.
$4,199 at us.ecoflow.com for one inverter and one battery.
0 ms online backup, at 182 lb for 6 kWh
The DELTA Pro Ultra is EcoFlow's modular home backup system of one inverter and one 6 kWh LiFePO4 battery, 181.8 lb across the two modules.
It suits a buyer wiring a home through a panel who wants 240 V without fuel, and who will charge it at 240 V or from solar.
What we like
- 0 ms online UPS mode
- 7,200 W at 120/240 V
- Expands to 30 kWh per inverter
- 5,600 W of solar over two inputs
- UL 9540 listing by model in SGS's directory
What holds it back
- Over four hours to charge on 120 V in TheSolarLab's test
- AC idle draw of about 53 W in HOBOTECH's test
- 181.8 lb across two modules
- Stutters on high-surge shop equipment in TheSolarLab's test
- Cords and panel sold separately
What you’re getting
- Capacity6,000 Wh or more
- AC Output6,000 W or more
- Output Voltage120/240 V split-phase
- Battery ChemistryLiFePO4
- Rated Cycles3,000-3,999 cycles
- Safety ListingUL 2743 listed, UL 9540 listed
- Solar Input4,000 W or more
- Backup Switchover0 ms (online)
- Warranty5 Years
- Expandable To20 kWh or more
- Weight181.8 lb
At a glance
- NEMA L14-30 outlet
- Modular inverter and battery
- Smart Home Panel 2 support
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 Pro Ultra is a whole-home backup system of one inverter and one 6,144 Wh LiFePO4 battery, rated 7,200 W continuous and 10,800 W surge at 120/240 V split-phase, with 20 A outlets, an L14-30 outlet and a TT-30 outlet in its online mode. It takes up to 5,600 W of solar through a high-voltage and a low-voltage input and charges at up to 3,000 W from a 240 V outlet. It switches to battery within 20 ms in backup mode and 0 ms in online mode, takes up to five batteries for 30 kWh per inverter and connects to EcoFlow's Smart Home Panel 2. The inverter weighs 70 lb and each battery 111.8 lb, and EcoFlow rates the battery for 3,500 cycles to 80 percent.
