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EcoFlow RIVER 3 Plus
Expandable miniPortableUnder $300UPSFast chargingExpandable

EcoFlow

EcoFlow RIVER 3 Plus

A 7.7 lb UPS that grows to 858 Wh.

4.4 (368)5.9/10
Capacity
286 Wh
Output
600 W
Surge
1,200 W
Weight
7.7 lb
Recharge
60 min
Solar in
220 W
$299.00Amazon price as of Sep 27, 2026

In stock · 200+ bought last month · Sold by ECOFLOW Direct

Check price on Amazon

Our verdict

The best small UPS here, with room to grow.

286 Wh with three AC outlets, a 10 ms UPS with PC shutdown support, a one-hour recharge and an add-on battery option that nearly triples capacity.

Ideal for

Desk and network UPS duty, and campers who may want more capacity later.

Skip it if

Anyone who needs to run appliances above 600 W.

Capacity3Output4Charging9Solar input4Portability8Battery life8Value7

Editor scores

How it rates

  • Capacity3
  • Output4
  • Charging9
  • Solar input4
  • Portability8
  • Battery life8
  • Value7

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

Specifications

Full spec sheet

Battery

Capacity286 Wh
Battery chemistryLiFePO4
Rated cycles3,000 cycles
Expandable to858 Wh

Output

AC output (continuous)600 W
Surge / peak1,200 W
AC outlets3
Fastest USB-C port100 W
30 A RV outlet—

Charging

Max AC charging input380 W
Full charge from the wall60 min
Charging speed (claimed)Full in 1 h from the wall; 1.5 h on 220 W of solar
Max solar input220 W
UPS switchover10 ms

Size & build

Weight7.7 lb
Dimensions9.2 × 9.1 × 5.8 in
Noise (claimed)30 dB

Other

App controlWi-Fi + Bluetooth
Warranty5 years

Other details

ExpansionAdd an EB300 (286 Wh) or EB600 (572 Wh) extra battery for up to 858 Wh
X-BoostRuns some resistive appliances up to 1,200 W
Battery protectionIP54-rated battery pack
UPS3 AC outlets on UPS; USB cable for PC shutdown software

How long it runs (estimates)

CPAP, no humidifier (40 W, 8 h a night)0.8 nights
CPAP + heated humidifier (90 W)0.3 nights
Wi-Fi router + modem (20 W)12 h
Full-size fridge (~1.3 kWh a day)4.6 h
Laptop (60 W)4.1 h
Phone charges (~15 Wh each)16 charges

Based on 286 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 RIVER 3 Plus against your fridge, CPAP, router and anything else in the runtime calculator

Sources: Amazon listing (286 Wh, 600 W / 1,200 W X-Boost, 3 AC, <10 ms UPS, 1 h AC charge, 220 W solar, expandable to 858 Wh, 7.7 lb, 5-year warranty). A dash (—) means the value isn't published anywhere we could verify.

In-depth review

What it's like to own

The RIVER 3 Plus is EcoFlow's small all-rounder: 600 W from three AC outlets, 100 W USB-C, a car socket and a 30 dB fan. It refills in an hour from the wall or 1.5 hours on 220 W of solar.

Its standout is expansion: clip on an EB300 or EB600 battery and capacity grows to 858 Wh, enough for a 12 V cooler over a festival weekend. The UPS switches in under 10 ms and includes a USB cable so a PC or NAS can shut down cleanly.

Owners have replaced traditional UPS boxes with it and run 12 V coolers overnight. With 368 ratings it has a shorter track record than the Jackery 300, and it's sold directly by EcoFlow.

Pros

  • Expandable to 858 Wh
  • 10 ms UPS with PC shutdown cable
  • Full recharge in 1 hour
  • Wi-Fi + Bluetooth app

Cons

  • Extra batteries cost more
  • 220 W max solar
  • Smaller review base
See it on Amazon

Owner reviews

What buyers say

4.4 (368)
  • 5★75%
  • 4★9%
  • 3★5%
  • 2★4%
  • 1★7%

4.4★ from 368 ratings (84% 4–5 stars). Owners use it as a server UPS and to run 12 V coolers overnight, and like the fast charging. Several note you must size it correctly for your loads.

5.0Jun 18, 2026

Replaced a traditional UPS that failed silently; now protects a server.

— Bo Jangles, Amazon.com

5.0May 1, 2026

Better than plugging a 12 V cooler into the car; runs it for hours.

— Will, Amazon.com

5.0Jul 15, 2025

Great for a festival if you size it to your needs.

— Amazon Customer, Amazon.com

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

Ready to decide?

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