EcoFlow DELTA Pro Ultra X Home Backup Power System

Name: EcoFlow DELTA Pro Ultra X Home Backup Power System
Brand: EcoFlow
SKU: DPUX-US

SVT Score, Top

7.9

Usability9.0/10Social6.8/10The SVT Score is placed on its category's range

Versus

9.0

SVT SCORESRead review

12 kWh home system with a 12 kW inverter at 240 V and 10 kW of solar, sold with at least two batteries.

$7,714

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SKU: DPUX-US Category: Home Backup Power Systems Brand: EcoFlow

Usability

9.0 out of 10

Capacity10.0

It stores 12,288 Wh in its smallest configuration, so it scores 10 on capacity.

Power Output10.0

Its inverter supplies 12,000 W continuous at 120/240 V, so it scores 10 on power output.

Recharging10.0

EcoFlow states 80 percent in about an hour on 12 kW of AC input and two inputs take 10,000 W of solar, so it scores 10 on recharging.

Battery Life6.0

Its batteries are the DELTA Pro Ultra's, which EcoFlow rates for 3,500 cycles to 80 percent capacity, so it scores 6 on battery life.

Backup Readiness10.0

It switches to battery in under 10 ms, expands to 61.44 kWh per inverter and connects to EcoFlow's Smart Home Panel 3, so it scores 10 on backup readiness.

Verification8.0

SGS lists the inverter system to UL 9540 by model, so it scores 8 on verification.

Warranty & Support8.0

EcoFlow's policy gives the inverter and batteries 5 years, so it scores 8 on warranty and support.

Warranty and returns

Its warranty runs 5 years on most stations, or 3 years plus 2 on registration, with returns within 30 days.

Price

$7,714 at us.ecoflow.com for one inverter and two batteries.

Summary

12 kW of inverter, two batteries minimum

The DELTA Pro Ultra X is EcoFlow's largest home backup system, one 12 kW inverter and two 6 kWh LiFePO4 batteries weighing 298.7 lb together.

Verdict

It suits a buyer replacing a standby generator for a whole home with an electrician lined up, who should not count on one inverter starting a large central air conditioner.

What we like

12,000 W continuous at 120/240 V
10,000 W of solar over two inputs
80 percent in about an hour on AC
Expands to 61.44 kWh per inverter
UL 9540 listing by model in SGS's directory
91 to 92 percent usable in two channels' tests

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What holds it back

Sold only with two or more batteries
No USB or DC ports
Inconsistent surge on compressor starts in TheSolarLab's test
Proprietary AC cable
298.7 lb as sold

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Social score

6.8 out of 10

Reddit6.0 out of 10

Liked

Whole-home and UPS reliability, per two owners
Fast generator recharge, per one owner

Complaints

Large air conditioner start-up trips the inverter or panel, per two owners
Unexplained shutdown with error 2558, per one owner
Support or parts delays, per two owners

DELTA Pro Ultra X owners in r/Ecoflow_community report a new three-battery unit that shut the house down twice with error 2558 at about 2 kW (February 2026), and a four-battery owner whose single unit could not start a new 4-ton air conditioner, which support said needs three inverters (March 2026). A 120 kWh owner needed soft starters before Smart Home Panel 3 stopped falling back to grid on each HVAC start but projects a five-year payback, and another called it a best purchase (May 2026).

Google7.0 out of 10

Liked

Low idle draw, per one reviewer
Seamless whole-home switchover, per one reviewer
50 A output and 12 kW, per one reviewer

Complaints

Inconsistent surge, per one reviewer
Load-balance and UPS charging trips, per one reviewer
Proprietary cable and no USB, per one reviewer

TheSolarLab, which earns affiliate commission and offers a discount code, measured about 36 W of idle draw and reached 10 kW of solar and 12 kW of AC charging, but found compressor starts inconsistent, load balancing that trips at about 6.5 kW on one leg, and UPS mode adding load on top of charging. ZDNet, which earns affiliate commission, ran a 3,000 sq ft home including air conditioning through an outage with a switchover under 20 ms (April 2026).

YouTube7.0 out of 10

Liked

91 to 92 percent usable capacity, per two channels
Low idle draw for a 12 kW inverter, per one channel

Complaints

Inconsistent surge, per one channel
Idle draw above 60 W, per two channels

HOBOTECH, which carries EcoFlow discount codes, drew 5,610 Wh from one 6,144 Wh battery, 91 percent (October 2025, about 3.09 million views), and Minute Man Solar, with affiliate links, drew 22.6 of 24.6 kWh, 92 percent, at a constant load. The Solar Lab, posting with a discount code, recorded surges up to 16 kW but inconsistent ones, and said on camera that EcoFlow puts the most marketing behind this model (February 2026, about 721,000 views). Idle draw readings differ: about 62 W for HOBOTECH, 63 W for Minute Man Solar and 36 W for The Solar Lab.

AmazonProduct-line7.0 out of 10

The DELTA Pro Ultra X has no rating pool of its own on Amazon; it is a style on the DELTA Pro Ultra listing (B0CQXMZ5BK), whose 4.1 from 374 ratings, 72 percent five-star and 14 percent one-star, is pooled with the DELTA Pro Ultra and its extra batteries and mostly predates this model's November 2025 launch.

User reviewsProduct-line7.0 out of 10

No US retailer sells the DELTA Pro Ultra X. Across the DELTA Pro family, Home Depot holds 19 native reviews of the DELTA Pro at 4.3 and 12 of the DELTA Pro 3 at 4.3, Walmart 11 of the DELTA Pro at 4.4, and Costco's two-unit DELTA Pro system reads 3.8 across 35.

Trustpilot

Trustpilot rates EcoFlow 3.6 from 10,553 reviews, 55 percent five-star and 23 percent one-star, mostly from European buyers.

Track record

The BBB rates EcoFlow Technology F without accreditation, with 122 complaints in three years.
The CPSC recalled about 25,030 DELTA Max 2000 stations in October 2025 for a fire hazard, remedied by a firmware update.
A class action filed in August 2026 challenges the reference prices on us.ecoflow.com.

Not countedExcluded

Not counted in any pool: entries syndicated from ecoflow.com, or flagged as incentivised at Best Buy or as Home Depot promotion entries.

Summary

Brand-level

3.6 on Trustpilot, an F from The BBB

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 9540 listed
Solar Input4,000 W or more
Backup Switchover10 ms or less
Warranty5 Years
Expandable To20 kWh or more
Weight298.7 lb

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At a glance

NEMA 14-50 outlet
NEMA L14-30 outlet
Smart Home Panel 3 support

Company

EcoFlow Technology, Inc. is EcoFlow's US company and is owned by Shenzhen EcoFlow Innovation Technology, a private firm founded in 2017.

Where it sells

It sells direct from us.ecoflow.com and through Amazon US, Costco, Home Depot, Lowe's and marketplace stores at Best Buy and Walmart.

Description

The EcoFlow DELTA Pro Ultra X is a whole-home backup system of one 12 kW inverter and two 6,144 Wh LiFePO4 batteries, 12,288 Wh in all, at 120/240 V split-phase, with two 20 A outlets, an L14-30 outlet and a NEMA 14-50 outlet and no USB or DC ports. It charges at up to 12 kW from AC, reaching 80 percent in about an hour, and takes up to 10,000 W of solar through two 5,000 W inputs. It switches to battery in under 10 ms on its own, takes up to ten batteries for 61.44 kWh per inverter and connects to EcoFlow's Smart Home Panel 3. The inverter weighs 76 lb and each battery 111.3 lb, and it is sold with no fewer than two batteries.

Researched and edited by Michael Ambrose · Unbroken Ads LLC · How we score

EcoFlow DELTA Pro Ultra X Home Backup Power System

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What holds it back

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