EcoFlow RIVER 3 Plus

Photo from the manufacturer

Ultraportable F1 · Outlet-sized (up to 1 kWh)

EcoFlow EcoFlow RIVER 3 Plus

Name: EcoFlow RIVER 3 Plus
Brand: EcoFlow
Author: JouleSpecs

Estimated price range

200–450 € ≈ $216–$486

An editorial estimate, not a selling price

JouleSpecs does not sell and does not show shop prices: check the price where you buy.

Where to buy

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Sheet on the EcoFlow website →

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Data from official source

Sheet curated by JouleSpecs — We check every spec sheet against the manufacturer's own documentation: each value carries its source and the date we read it. Published Sept. 20, 2026 · Data verified Sept. 21, 2026

EcoFlow RIVER 3 Plus is an ultraportable power station with lithium iron phosphate cells, built to sit in a backpack or on a car seat rather than in a corner of the home. It pairs with a single dedicated extra battery to extend runtime, when the starting capacity isn't enough anymore. Connected to the outlet, it recognizes a power outage on its own and switches to the battery to keep the connected devices running, without them noticing.

It charges from the home outlet, the sun or the car's cigarette lighter socket, even while it's connected to the grid and powering whatever's plugged in: in that case current passes straight from the outlet to the devices, so the battery stays charged. It also powers equipment that draws more than its rated power, like small motors or heating elements, without tripping the overload protection.

It's controlled even without a stable Wi-Fi network, over direct Bluetooth, though updates and finer settings still depend on the app and an internet connection. It's built for anyone who travels often and wants a single light reserve for the computer, the router or the lights during a weekend away or a small blackout; anyone looking for enough runtime for a fridge or several days off grid needs a higher capacity.

01 · Verified data

Technical specifications

Cell chemistry LFP (lithium iron phosphate)

Continuous output 600 W

Cost per kWh 1045,45 €/kWh

official manufacturer list price — on nominal capacity

Round-trip efficiency EcoFlow does not state it.

where we looked

Standby consumption EcoFlow does not state it.

where we looked

Parameter	Value	Source
Dimensions	23.4 × 23.2 × 14.6 cm (9.2 × 9.1 × 5.7 in)	manufacturer website
Weight	4.7 kg (10.4 lb)	manufacturer website
Nominal capacity	0.286 kWh	Declared by the brand
Cell chemistry	LFP (lithium iron phosphate)	Declared by the brand
Expandable	Yes	Declared by the brand
Maximum expanded capacity	0.858 kWh	Declared by the brand
Continuous output	600 W	Declared by the brand
Peak output	1200 W	Declared by the brand
Fastest USB-C	100 W	Declared by the brand
Maximum charge power	0.38 kW	Declared by the brand
Maximum solar input	220 W	Declared by the brand
Backup power	UPS	Declared by the brand
Switchover time	10 ms	Declared by the brand
Rated cycles	3000 cicli	Declared by the brand
Capacity at end of cycle life	80 %	Declared by the brand
Warranty	5 anni	Declared by the brand
Mounting	Portable	Declared by the brand
Noise level	30 dB	Declared by the brand
Official list price	299 €	Declared by the brand
Usable capacity	—	Not declared
Depth of discharge	—	Not declared
Cell supplier	—	Not declared
Peak duration	—	Not declared
AC outlets	—	Not declared
0–80% charge time	—	Not declared
Guaranteed throughput	—	Not declared
Guaranteed remaining capacity	—	Not declared
Round-trip efficiency	—	Not declared
Standby consumption	—	Not declared
Ingress protection	—	Not declared
Minimum temperature	—	Not declared
Maximum temperature	—	Not declared
Cell heating	—	Not declared
Wheels and handle	—	Not declared
Works without internet	—	Not declared
Local control	—	Not declared
Open protocols	—	Not declared
Home Assistant integration	—	Not declared
Where the data is hosted	—	Not declared
Remote updates	—	Not declared
App required for setup	—	Not declared
Declared standards	—	Not declared

Which documents this page rests on

ecoflow river 3 plus user manual 34 rows of the table

The rest of the data comes from 2 pages on the manufacturer's site, cited row by row in the table above.

A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.

02 · The numbers

What it really costs

Cost per kWh 1045.450 €/kWh official manufacturer list price — on nominal capacity

How we worked it out

price: 299
nominal capacity: 0.286

Battery life cycles 1825 cycles warranty years

the manufacturer does not state the guaranteed total energy throughput, which for heavy users is often the limit that runs out first

How we worked it out

stated cycles: 3000
warranty years: 1825

Cost of stored energy 0.573 €/kWh warranty years

the manufacturer does not state the guaranteed total energy throughput, which for heavy users is often the limit that runs out first
on nominal capacity: the manufacturer does not state the usable figure, so the real cost is higher
without conversion losses, which the manufacturer does not state: the real cost is higher

How we worked it out

price: 299
nominal capacity: 0.286
battery life cycles: 1825
round-trip efficiency: 100
energy delivered over the whole life: 522

Energy density 60.900 Wh/kg

on nominal capacity: the manufacturer does not state the usable figure, so the true number is lower

How we worked it out

nominal capacity: 0.286
weight: 4.700

Power-to-capacity ratio 2.100 C

on nominal capacity: the manufacturer does not state the usable figure, so the true number is lower

How we worked it out

continuous power: 600
nominal capacity: 0.286

These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.

03 · Summary

Pros and cons

In favour

When power fails it switches to the battery on its own: whoever's using it doesn't notice.
It also powers equipment with motors or heating elements that exceed its rated power, without tripping the overload protection.
It's controlled even without a stable Wi-Fi network, over direct Bluetooth. source
It also charges from the sun, besides the outlet and the car's cigarette lighter socket.

Worth knowing

If it isn't powering anything, it turns itself off after a few hours: keeping a fridge running continuously means turning off this setting in the app. source
The cigarette lighter output only handles small appliances, not a fridge or a tool that draws a lot. source
It grows with only one dedicated extra battery: you can't keep adding more later.

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