EcoFlow DELTA Pro Ultra review
EcoFlow DELTA Pro Ultra Power Station (6,144Wh)
By Tom Calder
Key specs
The maker's figures.
- Capacity
- 6,144 Wh
- AC output
- 7,200 W
- Surge
- —
- Weight
- 70.9 lb
- Battery
- —
A modular inverter and 6,144 Wh battery with 7,200 W at 120V and 240V, and room to grow to 90 kWh (maker). Made to sit in a garage or utility room and power a home's circuits through EcoFlow's home panel.
- Best for
- The biggest system here: 6 kWh and 7,200 W
- Skip it if
- You want something you can move around easily
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 7,200 W output
- 6,144 Wh, expandable to 90 kWh (maker)
- 120V and 240V
Worth knowing
- Heavy, multi-piece system
- More than most households need
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Our review
EcoFlow's DELTA Pro Ultra is a whole-home system, not a portable box: an inverter rated 7,200 W and a 6,144 Wh LFP battery that arrive as separate heavy pieces. This researched review covers EcoFlow's published specifications, the installation it describes, generator and solar inputs, and who should choose something simpler.
What it is and who it suits
The DELTA Pro Ultra is sold as a home battery system. EcoFlow's spec sheet lists an inverter with 7,200 W of pure sine AC output at 120/240V and a separate battery pack of 6,144 Wh using LFP cells. EcoFlow says the system starts at 6 kWh and can expand to 90 kWh with stackable batteries.
It suits a household that wants to back up part or all of the home through a transfer panel, and can accept an installation. This review is researched, not tested. It relies on EcoFlow's published specification sheet and US product page, Ready.gov and CDC.
Two heavy pieces, not one
Our tracked listing gives one weight, 70.9 lb. EcoFlow's spec sheet explains why: the inverter's net weight is 31.7 kg, which is 70 lb, and the battery is a separate 50.7 kg, which is 111.8 lb. A starter system is therefore about 182 lb in two pieces, before any extra battery.
The inverter measures 27.2 by 18.9 by 8.4 inches and the battery 26 by 18 by 8 inches. EcoFlow rates both IP54 and lists an operating range of -4 to 113°F. EcoFlow's US page says the system is built for indoor use and sells a trolley accessory.
Output and backup behavior
The inverter lists 7,200 W total at 120/240V, 60 Hz. EcoFlow's page says one 7,200 W unit runs a 4-ton central air conditioner, and adds that a soft-starter may be needed if the air conditioner's locked-rotor rating is not within 120 A. The spec sheet lists UPS backup under 20 ms and an online UPS of 0 ms, and EcoFlow's page says the Smart Home Panel 2 gives 20 ms backup across 12 circuits.
Note that the whole-home features depend on that panel and an installation. EcoFlow's US page describes a certified engineer who installs and commissions the system, and a free on-site assessment before you buy. Do not wire a home battery into a panel yourself.
Charging: solar, grid and generators
The spec sheet lists a high-voltage solar input of 80 to 450 V, 15 A, up to 4,000 W, and a low-voltage input of 30 to 150 V, up to 1,600 W. EcoFlow's page lists up to 5.6 to 16.8 kW of solar with multiple units, and says it works with the EcoFlow Smart Generator 4000 and most generators, delivering up to 12 kW, with an EcoFlow AC generator charging adapter required.
If you charge from a fuel generator, CDC says to use generators only outside, more than 20 feet from windows, doors and vents, with a battery-powered or battery backup CO detector in the home. Our generator safety guide has the full list.
Battery life and warranty
EcoFlow's sheet says the battery keeps 80 percent or more of its health after 3,500 cycles at 0.5C and 77°F, and its US page lists a 5-year warranty. Both are maker figures. Check the label for UL listings, which the spec sheet we read does not name.
How it compares and who should skip it
On our home battery comparison, the EcoFlow DELTA Pro 3 lists 4,096 Wh at 4,000 W and 113.54 lb, the Jackery Explorer 5000 Plus lists 5,040 Wh and 7,200 W at 134.5 lb, and the Anker SOLIX F3800 Plus lists 3,840 Wh and 6,000 W at 135.6 lb. The DELTA Pro Ultra gives the most output here and the most room to grow, but it needs a panel and an installer.
Skip it if you want something you can move, if you only need to run a fridge and lights, or if you rent. A 1 to 3 kWh station does that for far less hassle, and our power station vs generator guide helps you size it.
A researched review, built from the maker's specs, manual and US listings; facts checked 2 Nov 2026. Sources: EcoFlow: DELTA Pro Ultra specifications sheet (hosted by a retailer); EcoFlow US: DELTA Pro Ultra product page; CDC: Carbon Monoxide Poisoning Basics.
Who shouldn't buy this
Don't buy it if you want something you can move around easily.
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Most stored power for the money
Read the review →
Best for Two kilowatt-hours for longer outages
Best for 4 kWh and 240V in one wheeled unit
Read the review →Questions
Why does the listing say 70.9 lb?
That figure matches the inverter alone, which EcoFlow's spec sheet lists at about 70 lb. The 6,144 Wh battery is a separate piece at 111.8 lb, so the starter system weighs far more.
Does it need installation?
For whole-home backup through the Smart Home Panel 2, yes. EcoFlow's US page describes a certified engineer installing and commissioning the system. Use a licensed electrician for any panel work.
Can it run central air conditioning?
EcoFlow says one 7,200 W unit runs a 4-ton central air conditioner, with a soft-starter possibly needed if the unit's locked-rotor rating is not within 120 A. Check your unit's label.
Can I charge it from a generator?
EcoFlow says yes, with its AC generator charging adapter required. CDC says to run any generator outdoors, more than 20 feet from windows, doors and vents, with a CO detector inside.