• 0.28 kWh
  • 286Wh capacity. 
  • Expandable up to 858Wh with a wire-free connection.
  • 600W rated output and 1200W X-Boost.
  • 1-hr fast charging, no battery damage.
  • Up to 220W fast solar charging.
  • Up to 2× runtime for light-wattage appliances.
  • Compact and lightweight.
  • <10 ms pro-grade UPS for precision devices.
  • <30 dB whisper quiet for 24/7 use.

The ideal starter battery for outdoor and daily use that is compact yet powerful.

 

Handy, convenient on-the-go power. Take with you anywhere.

The RIVER 3 Series minimises heat loss, requires less cooling space, and supports a compact design. It easily fits into small spaces like closets, minivans, or bags for easy storage and portability.

Up to 600W Output

Your must-have companion for outdoor adventures and essential backup. With an output of up to 600W, RIVER 3 Series is the highest-rated 300Wh capacity power station in the industry. Use X-Boost to run up to 1200W heating devices with continuous and stable power. Power 90% of home appliances with RIVER 3 Series, the perfect starter for outdoor adventures and essential backup.

4 Charging Options

Safely charge from 0-100% in just 1 hour. Quickly prepare for outdoor trips or power needs.

Charging Method Details
AC Charging RIVER 3 Series fast-charges in 1 hour with X-Stream. Vehicle-grade cells and trickle charge technology ensure no battery damage.
Solar Charging Power up RIVER 3 Plus in 1.6 hours with 220W solar input. Use the 45W Portable Solar Panel (USB-C) to charge electronics directly.
Car Charging Charge using your car battery while driving. Perfect for on-the-go power needs.
Generator Charging Charge in just 1 hour with a gas generator, providing a full day of quiet, safe, and efficient power.

Adjust Capacity for Growing Energy Needs

Expandable up to 858Wh. Level up your power with the RIVER 3 Plus and an Extra Battery. Handling either the EB300 (286Wh) or the EB600 (572Wh), just stack them to get up to 858Wh of pure energy.

Specifications

General Details
Net Weight (kg) 4.7kg
Dimensions 9.2 x 9.1 x 5.8 in

234×231×146 mm

Capacity 286Wh
Output Details
Wireless ✖️
Car Power Output 1 port, 12.6V, 10A, 126W
USB-C Output 1 port, 5/9/12/15V⎓3A Max, 20V⎓5A Max, 100W Max
USB-A Output 2 ports, 5V⎓2.4A, 12W Max per port, total 24W
Battery Details
Cycle Life 3000 cycles to 80% capacity
Battery Chemistry LFP (LiFePO4)
Environmental Details
Operating Altitude ≤2000m
Discharge Temperature (℉)  –10℃ to + 45℃
Charge Temperature (℉) 0℃ to + 45℃
Storage Temperature (℉) 20℃ to 30℃
Input Details
Car Charging Input 11-30V, 8A Max, 100W Max, 0-100% in 2.8 Hr
Mains (AC) 360W – 0% to 100% in 1 hour
Solar 220W, 0-100% in 1.5 hr
Save: £7

Price Lower Than Manufacturer*

EcoFlow RIVER 3 Plus Portable Power Station

Original price was: £279.00.Current price is: £272.00.

Runtime Calculator

Enter your battery capacity and appliance wattage – or chose from one of the preset options – to calculate an approximate runtime.

Total Runtime: 0 hours and 0 minutes*
Wh
W

Warning: If the appliance’s power demand (W) exceeds the battery’s capacity (Wh), the charging or powering process on some power stations will not work as expected. Always ensure that the battery’s capacity is sufficient for the appliance’s power requirements before attempting to charge or power it.

*The figures provided by this calculator are indicative only and should be used as a general guide. Actual performance may vary depending on various factors, including the specific conditions of use and the efficiency of your devices.

What is Undertwok, or Under2k?

Well, we are an independent, and local, Retail shop that doubles as a Social media studio and event space. Our shop offers a unique blend of services with a vision to help everyone ‘Live their life under 2 kWh per day’. Our shop seamlessly blends traditional retail with digital innovation, our space serves as both a hub for our Portable Solar Powered products, available to purchase, and a dynamic social media studio. This space provides a platform for creativity to flourish, allowing visitors to not only shop, but also engage and learn about living their lives under 2 kWh per day.

Pop into the shop where we would love to chat over a solar powered pot of tea or coffee.

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Ask us about personal door-to-door home delivery from stock within the local area (RG postcode), or Shipping within 3-5 working days for the rest of the UK.