Ecoflow River 3 Max (river 3 Plus + Extra Battery 300) Expansion Battery
EcoFlow RIVER 3 Max (RIVER 3 Plus + Extra Battery 300) Expansion Battery is built for reliable home backup, outdoor power, RV travel, and emergency charging with 858 Wh capacity and 600W rated output
Capacity
858 Wh
AC Output
600W rated output
Overview
AC / Solar / Car
Price
Why it works
Portable backup, clearer details.
Overview
EcoFlow RIVER 3 Max (RIVER 3 Plus + Extra Battery 300) Expansion Battery is built for reliable home backup, outdoor power, RV travel, and emergency charging with 858 Wh capacity and 600W rated output
Capacity
858 Wh
AC Output
600W rated output
Solar Input
220W fast solar
Overview
<10 ms pro-grade UPS for precision devices - 600W rated output and 1200W X-Boost - Up to 2× runtime for light-wattage appliances - Expandable up to 858 Wh with a wire-free connection - Compact and lightweight - 1-hr fast charging
Overview
Solar-ready setup supports cleaner off-grid power when paired with compatible panels
Specs
Technical details
- Ups
- UPS / backup supported
- Noise
- 30 dB
- X Boost
- Supported
- Capacity
- 858 Wh
- AC Output
- 600W rated output
- App Control
- EcoFlow app
- Solar Input
- 220W fast solar
Community