EcoFlow DELTA 3 Plus Portable Power Station

3rd of 19 we've scored in Portable Stations

3rd of 19 in Portable Stations

EcoFlow DELTA 3 Plus Portable Power Station

SVT Score, Upper

7.3
Usability7.1/10Social7.4/10The SVT Score is placed on its category's range
Versus
7.1
SVT SCORESRead review

1,024 Wh station taking 1,000 W of solar over two inputs and a 56-minute wall charge, shipping November.

$669

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SKU: EFDELTA3P-US Category: Brand:

Usability

7.1 out of 10

It stores 1,024 Wh, the typical size for a compact station, so it scores 5 on capacity; StorageReview drew 910 Wh of it, 89 percent of rated.

Its inverter is rated 1,800 W continuous and 3,600 W surge, so it scores 8 on power output; TheSolarLab measured about 2,600 W of real surge.

A full wall charge takes 56 minutes and two inputs take 1,000 W of solar, so it scores 10 on recharging.

EcoFlow rates the cells for 4,000 cycles to 80 percent capacity, so it scores 8 on battery life.

It switches to battery in under 10 ms and takes EcoFlow's extra batteries up to 5 kWh, though no transfer switch is sold for it, 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 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.

$669 at us.ecoflow.com, on pre-order for November shipping.

Doubles the solar input, not the capacity

The DELTA 3 Plus is EcoFlow's 1 kWh LiFePO4 station with two solar inputs, a 27.6 lb box with six 120 V outlets.

Verdict

It suits a buyer charging mostly from solar who wants 1 kWh now and more later, and who should weigh TheSolarLab's finding that its fans lag under heavy load.

What we like

  • 1,000 W of solar over two inputs
  • Full wall charge in 56 minutes
  • Two 140 W USB-C ports
  • Expands to 5 kWh with extra batteries
  • 4,000 cycles to 80 percent
  • UL 2743 listing by model in SGS's directory

What holds it back

  • Sold on pre-ordershipping November
  • Fans slow to ramp under heavy load in TheSolarLab's test
  • Real surge about 2,600 W against 3,600 W claimed
  • No transfer switch sold for it
  • $70 more than the DELTA 3

Social score

7.4 out of 10
Reddit4.0 out of 10
Liked
  • Dual solar inputs and expansion, per one owner
Complaints
  • Unit died or locked on error codes, per four owners
  • Unexpected AC shutoff in UPS use, per three owners
  • Charging-priority and schedule software, per two owners

About nine owner reports on the DELTA 3 Plus in r/Ecoflow_community from February 2025 to April 2026 lean negative. One owner says it passed a generator's surges through and then cut AC output during a cyclone outage (March 2025), units died or locked on error codes about 90 days in (February 2026) and off-grid in Baja (June 2025), and a rack-UPS owner saw it shut off at 65 percent after 40 minutes (October 2025). Owners also fault its charging priority and schedule software.

Google7.0 out of 10
Liked
  • About 55-minute full charge, per one reviewer
  • About 89 percent usable capacity and an 8 ms switchover, per one reviewer
  • Expandable with older extra batteries, per two reviewers
Complaints
  • Fans slow to ramp and overheating under heavy load, per one reviewer
  • Surge below the claim, per one reviewer

StorageReview, which carries affiliate links, drew 910 Wh, 88.9 percent of rated, needed 1,180 Wh to recharge and measured a switchover just over 8 ms (January 2025). TheSolarLab, which earns affiliate commission on EcoFlow links, timed a full charge at 55 minutes and measured 82 percent efficiency, but found real surge near 2,600 W for about a minute and fans that would not ramp up at a 1,573 W load, the inside reaching 138°F. Popular Mechanics also tested it (October 2025).

YouTube8.0 out of 10
Liked
  • 87 to 88 percent usable capacity, per one channel
  • Low DC idle draw, per one channel

HOBOTECH drew 890 Wh on AC, 87 percent, and 899 Wh on DC, 88 percent, in a video labelled as a paid promotion (October 2024, about 193,000 views). Tech Made Easy, sponsored and supplied with its unit, ran 50 to 65 W loads for about 13.5 hours without publishing a total.

Amazon9.0 out of 10
Liked
  • Quality, tagged positive in 87 mentions
  • Reliability, tagged positive in 65 mentions
  • Charging speed, tagged positive in 44 mentions
Complaints
  • Reliability, tagged negative in 22 mentions
  • Quality, tagged negative in 12 mentions
  • Power capacity, tagged negative in 11 mentions

The station-alone listing (B0DCC2BVFW) reads 4.7 from 670 ratings, 88 percent five-star and 4 percent one-star. Amazon's review tags are positive on quality (87 of 99 mentions) and quiet operation (21 of 21), and mixed on reliability (22 negative of 87) and power capacity (11 negative of 45).

User reviews9.0 out of 10
Liked
  • Outage backup, per 14 reviewers
  • Value, per 10 reviewers
  • Light and portable, per eight reviewers
Complaints
  • Costco's bundled 60 W panels too weak to recharge it, per three reviewers
  • Charge does not last as advertised, per two reviewers
  • Bundle delivered in split shipments, per one reviewer

Costco's file holds 96 reviews averaging 4.6; the 44 readable English reviews carry no syndication or incentive label and average 4.45, 33 five-star and 3 one-star, with 30 of 38 recommending it. Home Depot's 446 and Lowe's 431 reviews are almost all syndicated from EcoFlow's site, much of it about the DELTA 2.

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.

Brand-level

3.6 on Trustpilot, an F from the BBB

What you’re getting

  • Capacity1,000-1,499 Wh
  • AC Output1,500-1,999 W
  • Output Voltage120 V only
  • Battery ChemistryLiFePO4
  • Rated Cycles4,000-5,999 cycles
  • Safety ListingUL 2743 listed
  • Solar Input1,000-1,999 W
  • Backup Switchover10 ms or less
  • Warranty5 Years
  • Expandable To5-9.9 kWh
  • Weight27.6 lb

At a glance

  • Two 500 W solar inputs
  • 126 W car port
  • Six 120 V outlets

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 Plus is a 1,024 Wh LiFePO4 station rated 1,800 W continuous and 3,600 W surge from six 120 V outlets, with two 140 W USB-C ports, two USB-A ports and a 126 W car port. It charges from the wall in 56 minutes at up to 1,500 W and takes up to 1,000 W of solar through two 500 W inputs. EcoFlow rates the cells for 4,000 cycles to 80 percent capacity, states a switchover under 10 ms and sells extra batteries that take it to 5 kWh. It weighs 27.6 lb and is sold on pre-order, shipping in November.

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