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EcoFlow DELTA 3 Max
1 kWh+2 kWh+UPS

EcoFlow

EcoFlow DELTA 3 Max

2 kWh with enough output for heavy kitchen appliances.

4.7 (609)6.3/10
Capacity
2,048 Wh
Output
2,400 W
Surge
4,800 W
Weight
44.8 lb
Recharge
80% in 68 min
Solar in
—
$879.00$1,199.00−27%Amazon price as of Sep 27, 2026

In stock · 500+ bought last month · Sold by EcoFlow Inc.

Check price on Amazon

Our verdict

A strong 2 kWh unit — pick it over the S2000 only if you need the extra output.

2,048 Wh and 2,400 W (4,800 W surge, 3,400 W X-Boost) with a 10 ms UPS and 80% in 68 minutes. More powerful than the Anker S2000, but $180 more and 9 lb heavier.

Ideal for

Outage backup that includes kitchen appliances.

Skip it if

Solar-first setups or buyers who want to expand later.

Capacity8Output9Charging7Solar inputn/aPortability2Battery life7Value7

Editor scores

How it rates

  • Capacity8
  • Output9
  • Charging7
  • Solar inputn/a
  • Portability2
  • Battery life7
  • Value7

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

Specifications

Full spec sheet

Battery

Capacity2,048 Wh
Battery chemistryLiFePO4
Rated cycles3,000 cycles
Expandable to—

Output

AC output (continuous)2,400 W
Surge / peak4,800 W
AC outlets—
Fastest USB-C port—
30 A RV outlet—

Charging

Max AC charging input—
Full charge from the wall—
Charging speed (claimed)0–80% in 68 min from the wall
Max solar input—
UPS switchover10 ms

Size & build

Weight44.8 lb
Dimensions9.4 × 12 × 19.4 in
Noise (claimed)—

Other

App controlEcoFlow app
Warranty5 years

Other details

X-BoostRuns resistive appliances up to 3,400 W
SolarMax solar input isn't on the US listing (EcoFlow's EU spec sheet lists 500 W)

How long it runs (estimates)

CPAP, no humidifier (40 W, 8 h a night)5.4 nights
CPAP + heated humidifier (90 W)2.4 nights
Wi-Fi router + modem (20 W)87 h
Full-size fridge (~1.3 kWh a day)33 h
Laptop (60 W)29 h
Phone charges (~15 Wh each)116 charges

Based on 2,048 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 Max against your fridge, CPAP, router and anything else in the runtime calculator

Sources: Amazon listing (2,048 Wh, 2,400 W, 3,400 W X-Boost, 0–80% in 1.13 h, <10 ms UPS, 44.8 lb, 5-year warranty) + Backup Power Hub (4,800 W surge, 3,000 cycles to 80%). A dash (—) means the value isn't published anywhere we could verify.

In-depth review

What it's like to own

The DELTA 3 Max is EcoFlow's mid-size home backup: 2,048 Wh and 2,400 W, with X-Boost running resistive loads like kettles and heaters up to 3,400 W. That's enough for a fridge, microwave and lights at the same time.

It charges to 80% in about 68 minutes and switches to battery in under 10 ms. EcoFlow doesn't list the solar input on the US listing (its EU spec sheet gives 500 W), and the standard Max isn't expandable — that's the Max Plus.

Owners praise fast charging and long runtime; several bought it for family in Cuba to cope with frequent blackouts.

Pros

  • 2,400 W, 4,800 W surge
  • 10 ms UPS
  • 80% in 68 minutes
  • 89% five-star ratings

Cons

  • 44.8 lb
  • Solar input not on the US listing
  • Not expandable
  • $180 more than the Anker S2000
See it on Amazon

Owner reviews

What buyers say

4.7 (609)
  • 5★89%
  • 4★5%
  • 3★2%
  • 2★0%
  • 1★4%

4.7★ from 609 ratings (94% 4–5 stars). Owners praise fast charging, long battery life and quiet operation, and several use it for family backup in Cuba.

5.0Aug 5, 2026

Charges very fast and the battery lasts a long time.

— Ariel Diaz, Amazon.com

5.0Aug 5, 2026

Bought for family in Cuba with frequent outages; they're very happy.

— Alexis Coutin, Amazon.com

5.0Aug 27, 2026

Great capacity; charges in a little over an hour.

— Kenyatta Arnold, Amazon.com

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

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