EcoFlow RIVER 3
A 245 Wh LiFePO4 portable power station with 300 W of output, weighing 3.55 kg and running below 30 dB.
- Best for light, quiet backup
- Power station
- 245 Wh
- 3.55 kg
- Capacity: 245 Wh with LiFePO4 cells rated for 3,000 cycles to 80%.
- Output: 300 W in total, with X-Boost up to 600 W for some devices.
- Charges from the mains in 60 minutes or from solar at up to 110 W.
- Weighs 3.55 kg and runs below 30 dB.
Not tested by us
We have not tested the EcoFlow RIVER 3. The figures on this page come from the sources listed at the end of the page, checked on 10 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
245 Wh
Capacity
300 W
AC output (600 W X-Boost)
3.55 kg
Weight
Specifications
Last checked on 10 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 245 Wh |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | LiFePO4 |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | 3,000 cycles to 80% capacity |
| ExpansionExtra battery units that add storage to the same system. | Not stated for this model. EcoFlow's RIVER 3 Plus is a different model that does expand. |
| Output | |
| AC output (continuous)The power it can deliver all the time. Add up the watts of what you want to run at once and stay below this. | 1 outlet, 300 W in total |
| AC output (surge)A short burst above the continuous rating, for appliances that draw more power when they start. | 600 W |
| X-BoostA mode that can run some devices above the normal output rating by lowering the voltage it supplies. Not suitable for every device. | Up to 600 W for devices that allow it |
| USB-APorts for phones, tablets and small devices. | 2 ports, 5 V 2.4 A, 12 W max each (24 W in total) |
| USB-CPorts for laptops, phones and tablets. Power delivery up to 100 W can charge most laptops. | 1 port, 100 W max (5/9/12/15 V 3 A, 20 V 5 A) |
| Car outletA 12 V socket like the one in a car, for car accessories. | 1 outlet, 12.6 V 10 A, 126 W max |
| Charging | |
| AC chargingHow fast it charges from a wall socket. Higher means a shorter wait. | 305 W (200-240 V, 3 A) |
| Time to charge from the mainsHow long a full charge takes from a wall socket. | 0-100% in 60 minutes |
| Solar inputHow much solar panel power it accepts. A higher figure fills the battery faster on a sunny day. | 110 W max, 11-30 V, 8 A |
| Solar charging timeHow long a full charge takes from solar panels, in the conditions the maker names. | 0-100% in as fast as 2.6 hours with 110 W |
| Car chargingCharging from a car's 12 V or 24 V socket while driving. Slow, but useful on the road. | 100 W max (11-30 V, 8 A): 0-100% in about 2.8 hours |
| Backup switchover (EPS)What happens when the grid fails. EPS means it takes over automatically. | Under 20 ms (under 10 ms on the RIVER 3 UPS version) |
| Pass-through chargingWhether it can power devices while it is itself being charged. | Not stated |
| Housing and warranty | |
| Dimensions (L × W × H)Check the space before you buy, including room around it for airflow and cables. | 255 × 212 × 113 mm |
| WeightMatters for lifting, wall mounting and moving it. | 3.55 kg |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | Charging 0 to 45 °C; discharging -10 to 45 °C |
| Noise levelFan noise while working. | Below 30 dB at 0.5 m |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP54 for the battery pack |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | Not stated on the product page text we read |
How long will it run your devices?
Choose how many of each device you want to run at the same time. The wattages are typical figures, so check the label on your own devices.
| Device | Typical power | How many |
|---|---|---|
| 10 W | ||
| 10 W | ||
| 15 W | ||
| 60 W | ||
| 80 W | ||
| 80 W | ||
| 40 W | ||
| 1,000 W | ||
| 2,000 W | ||
| 1,000 W | ||
| W |
The estimate assumes 85% of the rated capacity is usable after conversion losses. EcoFlow does not state this figure, so we use a cautious assumption. Real running times vary with temperature, battery age and how each device draws power.
Compatible with
What EcoFlow says this product works with. Anything not listed here is not confirmed.
- Extra batteries
- The page does not state this for the RIVER 3. EcoFlow's RIVER 3 Plus expands to 858 Wh with extra batteries, but that is a different model.
- Solar panels
- Solar input is 11-30 V, 8 A and 110 W at most. EcoFlow names its 45 W portable panel as a match.
- Generators
- Generator input of 320 W at 200-240 V.
Rules where you live
A portable power station is not wired into your home, so it is simple to use almost anywhere. Connecting one to your home circuits to power the house is different, and the rules for that vary by country. See our country guides for the rules, incentives and prices where you live.
Strengths and things to check
Strengths
- Compact and light at 3.55 kg
- 60-minute mains charge
- Below 30 dB, so it suits rooms where you sleep or work
- 100 W USB-C for laptops
- UPS switchover under 20 ms
Worth checking before you buy
- 300 W continuous output: not for kettles or heaters (X-Boost reaches 600 W for some devices)
- Not expandable (the RIVER 3 Plus is the expandable model)
- Only one AC outlet
- The product page text we read does not state the warranty
- Not a home battery: do not connect it to your home circuits in a way that lets it feed the house
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 10 November 2026
- Page published. Warranty: not stated on the EcoFlow UK product page text we read, so none is shown.
Where this information comes from
We have not tested the RIVER 3. Every figure above comes from EcoFlow's UK product page, last checked on 10 November 2026. The RIVER 3 UPS, RIVER 3 Plus and RIVER 3 Max are different models with other specifications. A value that the page does not state is shown as not stated.
We do not show prices, because they change often and differ between sellers.
- Manufacturer EcoFlow UK RIVER 3 page
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Common questions about EcoFlow RIVER 3
What can the RIVER 3 run?
It has 300 W of continuous output and EcoFlow says X-Boost can power some heating devices up to 600 W. Phones, laptops, routers and lights are within reach; a kettle is not. Divide 245 Wh by the device's draw for a rough running time.
What is the difference between the RIVER 3 and the RIVER 3 Plus?
EcoFlow lists the RIVER 3 at 245 Wh and 300 W, and the RIVER 3 Plus at 286 Wh and 600 W (1,200 W X-Boost). The Plus expands to 858 Wh with extra batteries. This page covers the RIVER 3 only.
Is the RIVER 3 the same as a home battery?
No. It is a portable power station that you plug devices into. An installed home battery is wired into your electrics by an electrician. See our guide to plug-in and installed home batteries.
Related guides
Need a home battery rather than a portable one?
Our calculator uses your own usage and tariff to estimate what a home battery could save, with conservative assumptions.