EcoFlow RIVER 3 Plus review
EcoFlow RIVER 3 Plus Portable Power Station
By Tom Calder
The sensible entry point to EcoFlow's current range: a 286Wh LiFePO4 pack rated for 3,000 cycles, three mains sockets, a 100W USB-C and a 12V socket, recharged from the wall in an hour. What sets it apart from other small units is the extra-battery system: an EB300 or EB600 clips on underneath with no cables, taking it to 858Wh if you later decide you want the fridge covered too. The under-10ms switchover means a router or desktop rides through the cut without noticing. Its 600W output (1,200W with X-Boost for simple heating loads) rules out kettles and most heaters, which is true of every unit at this size.
- Best for
- Phones, a router, lights and a laptop through an evening's power cut, in a unit small enough to live in a cupboard — with the option to add capacity later.
- Skip it if
- You only need to keep phones and a tablet going
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- LiFePO4 cells rated for 3,000 cycles to 80% — EcoFlow puts that at roughly ten years of everyday use — with a five-year UK warranty
- Expandable without tools: an EB300 or EB600 extra battery attaches underneath, up to 858Wh, so you can start small
- Full recharge from the mains in 60 minutes, and an under-10ms UPS switchover for a router or home-office kit
Worth knowing
- 286Wh on its own is a phones-lights-router unit: a fridge needs the extra battery or a bigger station
- 600W rated output, so kettles, toasters and fan heaters are off the menu even with X-Boost
- The base unit showed as sold out on EcoFlow's own UK store when we checked; Amazon had it at a slightly higher price
Out of stock when we checked: our alternatives
Closest in size first, then by our score. None of them was showing out of stock when we last checked.
Best for Keeping the essentials going in a power cut — fridge, broadband router, phones and a few lights.
as of 6 Nov 2026, 13:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Phones, a router, a laptop and lamps through an evening's power cut, in a unit you can carry with one hand.
Best for Keeping phones, a tablet and even a laptop charged through a day-long power cut, and carrying onto a flight.
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Our review
A 286Wh LiFePO4 station with three UK sockets, a 600W inverter and a feature neither of its closest rivals on our site offers: an extra battery locks onto its base and takes it to 858Wh. Alone it covers broadband, lights, phones and a laptop for an evening, not a fridge. For a household that wants a quiet UPS by the router now and room to grow later.
What 286Wh and 600W mean in a British home
286 watt-hours is the energy in the battery. By our site-wide planning method (90% of the battery usable, 85% through the inverter), about 219Wh is left to share between your devices and the unit's own draw of about 10W. The 600W figure is the most the three sockets can deliver at once: plenty for a router, laptop, TV or CPAP, but not a kettle, toaster or microwave. X-Boost lets heating and motor-driven appliances rated up to 1,200W run; the manual says it is unavailable in bypass mode and does not suit devices with voltage protection. A kettle at 2,200W or more is beyond it either way.
In a UK power cut
By our method, a BT Smart Hub 2 (8.5W in standby, 14.1W in use) runs 9 to 12 hours. A laptop gets 2.5 to 5.5 hours, a television 1 to 5 hours, and a CPAP machine 7.5 to 16 hours with its humidifier off (2.5 to 7 hours with it on). An electric blanket runs 2.5 to 4.5 hours. A fridge-freezer, averaging 12W to 51W once cycling, lasts 3.5 to 10 hours: a short cut covered, not a weekend. See our fridge-freezer guide first.
EcoFlow's UK page quotes up to 35 hours for a 3W Wi-Fi router. Our figures are lower because a BT hub draws more than 3W and our sums assume the mains socket; running the router from the 12V or USB-C port skips the inverter. Plugged into the wall, it acts as a standby UPS with a transfer time within 10ms, which EcoFlow pitches at routers, desktop PCs and NAS drives.
How it compares
The BLUETTI Elite 30 V2 is the direct rival: 288Wh and 600W too, 4.3kg against 4.7kg, a 140W USB-C and a 4.5W standby figure, but one mains socket and no expansion. The plain RIVER 3 has 41Wh less, half the output at 300W, one socket rather than three and three fewer years of cover (24 months against five on EcoFlow UK's policy). Pick the Plus if the fridge might join the list later, because an EB600 underneath makes it 858Wh. If the fridge is already on the list, start at 1kWh in the power station comparison.
Living with it
EcoFlow's UK spec table lists 360W mains input and a full charge in 60 minutes; the manual allows up to 380W, or 650W with an extra battery fitted. Solar input is 11V to 55V and 220W at most through an XT60i lead (not in the box). The app, over Bluetooth or Wi-Fi, sets charge speed, charge and discharge limits and port memory. EcoFlow quotes under 30dB from a lab test at 32°C. Refilling 286Wh comes to about 8p at the Ofgem price cap direct debit unit rate of 26.32p per kWh for October to December 2026, plus a little for charging losses. The warranty is five years on EcoFlow UK's policy page; the manual says leaving it uncharged and unused for more than six months voids it.
Safety and storage
The manual's limits: charge between 0°C and 45°C, use it between -10°C and 45°C, and store it between -10°C and 45°C (ideally 0°C to 30°C), away from heat sources and anything flammable. For long-term storage, every three months charge it fully then run it down to 60%. The Scottish Fire and Rescue Service's advice for any lithium-ion kit applies too: never charge it in a hallway or on an escape route, do not cover it while charging, and stop using it if it swells, hisses or gets very hot. More in our lithium battery fire safety guide.
Our verdict
Buy it if you want a quiet UPS for broadband and a home office, an evening of lights, phones and a laptop, and a path to more capacity without replacing it. Skip it if your list stops at phones and a tablet, where our power bank comparison covers it for far less, or if the fridge-freezer is why you are shopping, where our sizing guide points you to 1kWh.
A researched review, built from the maker's specs, manual and UK listings; facts checked 21 Oct 2026. Sources: EcoFlow UK — RIVER 3 Plus Portable Power Station (product page and spec table); EcoFlow — RIVER 3 Plus user manual (specifications, X-Boost, UPS, storage and safety); EcoFlow — RIVER 3 Plus product page (UPS uses: desktops, NAS, routers); EcoFlow UK — warranty policy (RIVER 3 Plus 5 years; RIVER 3 24 months; 30-day returns and replacements); Ofgem — energy price cap unit rates, 1 October to 31 December 2026; Scottish Fire and Rescue Service — lithium-ion batteries at home.
Who shouldn't buy this
You only need to keep phones and a tablet going — a 20,000-25,000mAh power bank does that for a fraction of the price. And if the fridge is the reason you're shopping, start at 1,000Wh (the DELTA 3 Classic or BLUETTI Elite 100 V2) rather than buying this and an extra battery.
Key specs
| Capacity | 286 Wh |
| Output | 600 W |
| Weight | 4.7 kg |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
Questions
Can the EcoFlow RIVER 3 Plus run a fridge-freezer?
For a few hours. A fridge-freezer averaging 12W to 51W gives 3.5 to 10 hours from 286Wh by our method. EcoFlow lists a 1,200W surge rating, above the 960W start our appliance data allows for a large American-style model. For an overnight cut you want the EB600 extra battery or a 1kWh station.
How long does the RIVER 3 Plus take to charge?
EcoFlow quotes a full charge in about an hour from the mains, as fast as 1.5 hours from 220W of solar and about 3.3 hours from a car socket.
How loud is the EcoFlow RIVER 3 Plus?
EcoFlow quotes under 30dB, from a lab test at a room temperature of 32°C. It has a cooling fan, so keep the vents clear and never cover it, especially if it lives in a bedroom.
Can I add a battery to the RIVER 3 Plus later?
Yes. One Smart Extra Battery, the EB300 (286Wh) or EB600 (572Wh), locks onto the base with no cable, for 572Wh or 858Wh in total. The plain RIVER 3 cannot be expanded.
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