EcoFlow RIVER 3 Plus Review: Compact Power Under 5 kg
Verdict
3.6/5
The RIVER 3 Plus suits people who want a small, light station for camping, phones and laptops: 286 Wh of LFP in 4.7 kg with 600 W continuous output. It stores far less energy than 1 kWh models and costs more per Wh, so it is a portability pick rather than a backup pick.
Best for: Camping and day trips; Laptops, phones and lights; Compact desk backup
Skip if: You want to run a fridge for hours; Price per Wh matters most
From $279Reference price, Oct 11, 2026
Check price at EcoFlow- Portable (under 15 kg)
- UPS-grade switchover (≤ 30 ms)
- LFP battery
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Key specs
| Capacity | 286 Wh |
|---|---|
| Battery chemistry | LFP |
| Rated cycles | 3,000 cycles |
| Continuous output | 600 W |
| Surge output | 1,200 W |
| Weight | 4.7 kg |
| Energy density | 60.9 Wh/kg |
| Max solar input | 220 W |
| AC charge time (0–100%) | 1 h |
| UPS switchover | 10 ms |
| Expandable | Yes |
| Outlets | 3 AC · 1 USB-C · 2 USB-A · 1 car |
Who is it for?
The RIVER 3 Plus is for people who need a small power source they can carry in one hand: camping lights, phones, a laptop, a weekend away. If you plan to power a medical device, check its power requirements and the guidance of your clinician and the device’s manufacturer before relying on any power station.
Battery and output
The pack is 286 Wh of LFP, rated by EcoFlow for 3,000 cycles (to 80%). Continuous AC output is 600 W with a 1,200 W surge rating, and EcoFlow lists a switchover time of 10 ms or less. The weight is 4.7 kg, about 61 Wh per kg, the lowest of the five stations we review.
Charging and solar
AC charging from 0 to 100% takes 60 minutes. Solar input is up to 220 W. EcoFlow lists EB300 and EB600 extra battery options that expand capacity up to 858 Wh.
Ports
Three AC outlets, one USB-C, two USB-A and one car outlet.
How it compares
Reference prices on Oct 11, 2026: $279 in the US store (a promotional price that day; regular price $299; about $0.98 per Wh) and €299 in the EU store. The EcoFlow DELTA 3 Plus was about $0.70 per Wh on the same date, and the 1 kWh stations from Jackery, Anker and BLUETTI were between about $0.43 and $0.49 per Wh. You pay for portability here. Use the runtime calculator to check your loads, or browse the power station list.
What to watch out for
At 286 Wh the RIVER 3 Plus will not run large appliances for long, and 600 W of output rules out most heaters and kettles. Prices are dated snapshots and promotions change them. As of Oct 11, 2026 the US store listing showed the unit as sold out or available on pre-order, so check availability before planning around it. This review is based on published specifications, not hands-on testing.
Pros
- 4.7 kg and 286 Wh of LFP
- 60-minute AC charge from 0 to 100%
- 600 W continuous with 1,200 W surge
- Expandable with EB300 or EB600 extra batteries
Cons
- About $0.98 per Wh at the Oct 11, 2026 reference price, the highest among tracked US models
- 286 Wh runs a 100 W load for under 3 hours
- Lowest Wh per kg of the five reviewed (about 61)
FAQ
How long will the RIVER 3 Plus run a 100 W device?
About 2.4 hours, since 286 Wh times 0.85 inverter efficiency divided by 100 W is 2.43 hours; the lossless 2.86 hours is an upper bound.
Can it be expanded?
Yes. EcoFlow lists EB300 and EB600 extra batteries that take capacity up to 858 Wh.
Sources
- EcoFlow RIVER 3 Plus specifications (US store) (us.ecoflow.com)
- EcoFlow RIVER 3 Plus specifications incl. weight and car output (UK store) (uk.ecoflow.com)
From $279
Check price at EcoFlow