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EcoFlow DELTA 3
Expandable to 5 kWh1 kWh+Fast chargingSolar 500 W+Expandable

EcoFlow

EcoFlow DELTA 3

The 1 kWh station that grows to 5 kWh.

4.7 (1,356)7.2/10
Capacity
1,024 Wh
Output
1,800 W
Surge
3,600 W
Weight
27.5 lb
Recharge
—
Solar in
500 W
$599.00$699.00−14%Amazon price as of Sep 27, 2026

In stock · 600+ bought last month · Sold by Amazon.com

Check price on Amazon

Our verdict

Buy it for the expansion port; otherwise the Classic is the better deal.

EcoFlow's full DELTA 3: 1,024 Wh, six AC outlets, 13 outputs in total and an expansion port that scales it to 5 kWh. It costs $100 more than the DELTA 3 Classic for that flexibility.

Ideal for

Buyers who want to start at 1 kWh and add capacity later, and RV owners with alternator charging.

Skip it if

Anyone sure they'll never expand — get the Classic.

Capacity6Output8Charging9Solar input7Portability4Battery life9Value7

Editor scores

How it rates

  • Capacity6
  • Output8
  • Charging9
  • Solar input7
  • Portability4
  • Battery life9
  • Value7

Scores are our editorial ratings (0–10), not manufacturer specs. How we score.

Specifications

Full spec sheet

Battery

Capacity1,024 Wh
Battery chemistryLiFePO4
Rated cycles4,000 cycles
Expandable to5,000 Wh

Output

AC output (continuous)1,800 W
Surge / peak3,600 W
AC outlets6
Fastest USB-C port100 W
30 A RV outlet—

Charging

Max AC charging input1,500 W
Full charge from the wall—
Charging speed (claimed)Full in 56 min using wall + 500 W solar together
Max solar input500 W
UPS switchover—

Size & build

Weight27.5 lb
Dimensions15.7 × 8 × 11.2 in
Noise (claimed)—

Other

App controlEcoFlow app
Warranty5 years

Other details

Outputs13 total: 6 AC, 2 USB-C 100 W, 2 USB-A, car 126 W, 2 DC5521
ExpansionUp to 5 kWh with DELTA 3 / DELTA Pro 3 / DELTA 2 Max batteries
Car charging800 W alternator input
Battery protectionIP65 battery pack

How long it runs (estimates)

CPAP, no humidifier (40 W, 8 h a night)2.7 nights
CPAP + heated humidifier (90 W)1.2 nights
Wi-Fi router + modem (20 W)44 h
Full-size fridge (~1.3 kWh a day)17 h
Laptop (60 W)15 h
Phone charges (~15 Wh each)58 charges

Based on 1,024 Wh × 85% usable after inverter losses. Your devices may draw more or less — check yours in the calculator.

Will it run your devices?Check EcoFlow DELTA 3 against your fridge, CPAP, router and anything else in the runtime calculator

Sources: Amazon listing (1,024 Wh, 1,800 W / 3,600 W surge, 6 AC, 1,500 W AC + 500 W solar, expandable to 5 kWh, 4,000 cycles to 80%, 27.5 lb, 5-year warranty). UPS time isn't stated on this listing. A dash (—) means the value isn't published anywhere we could verify.

In-depth review

What it's like to own

The DELTA 3 adds what the Classic leaves out: an extra-battery port (up to 5 kWh with EcoFlow's DELTA 3, DELTA Pro 3 or DELTA 2 Max packs), six AC outlets and an 800 W alternator charging input for vans and RVs.

Output is the same 1,800 W (3,600 W surge), and with wall and solar together it fills in 56 minutes. The battery is rated for 4,000 cycles to 80%, and Amazon sells it directly.

Owners run diesel heaters overnight, fridges on two-night camping trips and coffee makers during outages; several have sent units to family in Cuba for blackouts.

Pros

  • Expandable to 5 kWh
  • 6 AC outlets, 13 outputs
  • 4,000 cycles to 80%
  • Sold by Amazon

Cons

  • $100 more than the Classic
  • 500 W max solar
  • UPS time not listed
See it on Amazon

Owner reviews

What buyers say

4.7 (1,356)
  • 5★90%
  • 4★5%
  • 3★1%
  • 2★1%
  • 1★3%

4.7★ from 1,356 ratings (95% 4–5 stars). Owners praise reliability during outages, fast charging and the number of outlets. Several run fridges, heaters and coffee makers on it.

5.0Sep 10, 2026

Practical and reliable for home outages and trips.

— Lianna Ramos, Amazon.com

5.0Aug 8, 2026

Runs a diesel heater all night where a smaller unit couldn't.

— Jay, Amazon.com

5.0Aug 9, 2026

Ran a fridge for two nights of camping without solar.

— Vivian, Amazon.com

5.0Aug 18, 2026

Runs a large coffee maker and an electric blanket all night.

— Athena369, Amazon.com

Owner reviews from Amazon.com, summarized in our words. Ratings as of Sep 27, 2026.

Ready to decide?

Check today's price and delivery date on Amazon, or stack it against the alternatives.

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