EcoFlow RIVER 3 Max Plus – 858Wh Portable Power Station
858Wh EcoFlow RIVER power for longer UK backup and off-grid use.
- Compact backup for essentials
- Easy to move and store
- Useful step above a power bank
- Designed for everyday backup planning
- Good for home and travel
More RIVER capacity for longer backup windows.
Out of stock
Is the RIVER 3 Max Plus right for you?
Good fit if you want to:
- Keep selected essentials running during short UK power cuts
- Power Wi-Fi equipment, lights, phones, laptops and low-demand kit
- Use one compact unit for home backup, camping and campervan trips
- Choose a portable EcoFlow setup without stepping into a large DELTA system
- Recharge between uses from mains and suitable charging options
Consider another setup if:
- You need whole-home backup or fixed installation
- You want to run several high-draw appliances at the same time
- You need multi-day backup without recharging
- You regularly use electric heating, kettles, ovens or heavy tools
- You want a larger expandable DELTA system
What can it power?
Fridge freezer
Keep chilled food protected during interruptions
Estimated 4 hoursWi-Fi router
Keep broadband equipment running where service remains available
Estimated 31–43 hoursLED lighting
Run key low-wattage lighting for extended periods
Estimated 43 hoursLaptop
Power work, study and admin away from mains
Estimated 12 chargesPhones
Keep family phones charged and reachable
Estimated 78 chargesTV
Run a suitable TV during longer outages
Estimated 8 hoursRuntime is estimated and depends on appliance wattage, battery level, operating mode and real-world conditions.
RIVER 3 Max Plus at a Glance
A Closer Look at the RIVER 3 Max Plus
The RIVER 3 Max Plus sits in the practical middle ground between small USB power banks and larger home-backup stations. It is compact enough to move easily, but useful enough to support selected essentials such as Wi-Fi equipment, lighting, phones, laptops and low-demand appliances during shorter power cuts.
It is a sensible choice for UK households that want backup without fuel, fumes or a permanently installed system.
Why it works for your setup
Compact backup for essentials
Helps keep Wi-Fi, phones, lights and small devices available during shorter outages.
Easy to move and store
Practical for cupboards, cars, vans, camping trips and flexible home use.
Useful step above a power bank
More capable than small USB packs without moving into a large DELTA setup.
Designed for everyday backup planning
Suitable for selected low-demand devices within the product rating.
Good for home and travel
One portable setup for power cuts, weekend trips and campervan use.
Why Buy From VoltReady™
UK-Based Business
VoltReady is a UK-based portable-power specialist serving customers across the United Kingdom.
Manufacturer Warranty
Products include manufacturer-backed warranty cover, with the exact terms shown clearly on each product page.
Flexible Ways to Pay
Pay securely by card, Apple Pay, Google Pay, Klarna or Clearpay. Available options depend on your order and eligibility.
UK Customer Support
Get straightforward help before and after your purchase through live chat or email.
Everything important, clearly organised
Key Features
Technical Specifications
What’s in the Box
FAQs
Is the RIVER 3 Max Plus suitable for UK power cuts?
Yes, for selected essentials within its 600W AC output rating. The 858Wh capacity gives more runtime than the smaller RIVER 3 models.
What can the RIVER 3 Max Plus realistically power?
It is best for Wi-Fi equipment, phones, lighting, laptops and suitable low-wattage appliances. Check wattage and surge demand before connecting devices.
Can it run kettles, heaters or ovens?
Only if the appliance is within rating, but high-heat appliances drain batteries quickly and are usually a poor use case.
Can it recharge from solar?
Yes. EcoFlow lists up to 220W solar input for the RIVER 3 Plus Series with an 11-55V, 13A input range.
Is this a whole-home backup system?
No. It is a portable power station for selected essentials, not a professionally installed whole-home battery system.
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