RIVER 3 Max

Printed as "LiFePO4, 3000 cycles to 80% capacity" in the specifications table on the RIVER 3 Max store page, which gives the RIVER 3 Plus unit's figures. EcoFlow's RIVER 3 Series page, which covers RIVER 3 Max, prints "LiFePO4 cells, 10-year lifespan" and "RIVER 3 Series has a lifespan of 3000 charging cycles", before capacity "drops to 80%". Cell supplier and format are not published. Revised on 1 October 2026: The store page table gives the RIVER 3 Plus unit's figures; EcoFlow's RIVER 3 Series page states the same cells and cycle life for the whole series, RIVER 3 Max included.

Location: Store page specifications table, Battery Chemistry; RIVER 3 Series page, battery protection section

Documented

EcoFlow prints no weight for RIVER 3 Max (RIVER 3 Plus + Extra Battery 300). "Net Weight 10.4 lb" is printed in the specifications table on the RIVER 3 Max store page, the table that gives "Capacity 286Wh", the RIVER 3 Plus unit's own capacity, so it is not a figure for this bundle. The weights of the two parts are not added together. Revised on 1 October 2026: EcoFlow prints this weight only for the RIVER 3 Plus unit, while this record is the RIVER 3 Max bundle of a RIVER 3 Plus and an Extra Battery 300.

Not documented

EcoFlow prints no size for RIVER 3 Max (RIVER 3 Plus + Extra Battery 300). "Dimensions 9.2×9.1×5.8 in" is printed in the specifications table on the RIVER 3 Max store page, the table that gives "Capacity 286Wh", the RIVER 3 Plus unit's own capacity, so it is not a figure for this bundle. Revised on 1 October 2026: EcoFlow prints this size only for the RIVER 3 Plus unit, while this record is the RIVER 3 Max bundle of a RIVER 3 Plus and an Extra Battery 300.

Not documented

EcoFlow prints no port list for RIVER 3 Max (RIVER 3 Plus + Extra Battery 300). The output list ("3 outlets, 600W total", "2 ports, 5V=2.4A", "1 port") is printed in the specifications table on the RIVER 3 Max store page, the table that gives "Capacity 286Wh", the RIVER 3 Plus unit's own capacity, so it is not a figure for this bundle. The RIVER 3 Series page also says an extra battery adds "140W USB-C charging and recharging", so that list is not this bundle's full set of ports. Revised on 1 October 2026: EcoFlow prints this port list only for the RIVER 3 Plus unit, while this record is the RIVER 3 Max bundle of a RIVER 3 Plus and an Extra Battery 300.

Not documented

Printed as "572Wh Capacity | 600W Output" for RIVER 3 Max on EcoFlow's RIVER 3 Series page. The specifications table on the RIVER 3 Max store page, which gives the RIVER 3 Plus unit's figures, prints "3 outlets, 600W total (Surge 1200W, X-Boost 1200W)"; neither page states the test temperature or power factor. Revised on 1 October 2026: EcoFlow prints this output for RIVER 3 Max itself on its RIVER 3 Series page; the store page table gives the RIVER 3 Plus unit's figures.

Location: RIVER 3 Series page, RIVER 3 Max model card; store page specifications table, AC Output

Documented

Printed as "572Wh Capacity | 600W Output" for RIVER 3 Max on EcoFlow's RIVER 3 Series page, which also prints RIVER 3 Plus as "286Wh Capacity" and the RIVER 3 Max runtime chart as "RIVER 3 Plus + Extra Battery EB300 (286Wh)". The specifications table on the RIVER 3 Max store page prints "Capacity 286Wh", the RIVER 3 Plus unit's own capacity. Revised on 1 October 2026: EcoFlow prints 572Wh as the capacity of RIVER 3 Max, the RIVER 3 Plus with an Extra Battery 300; the recorded 286Wh is the RIVER 3 Plus unit's own capacity.

Location: RIVER 3 Series page, RIVER 3 Max model card

Documented

EcoFlow prints no solar input for RIVER 3 Max (RIVER 3 Plus + Extra Battery 300). "220W, 0-100% in as fast as 1.5 hr" is printed in the specifications table on the RIVER 3 Max store page, the table that gives "Capacity 286Wh", the RIVER 3 Plus unit's own capacity, so it is not a figure for this bundle. Revised on 1 October 2026: EcoFlow prints this solar input only for the RIVER 3 Plus unit, while this record is the RIVER 3 Max bundle of a RIVER 3 Plus and an Extra Battery 300.

Not documented

EcoFlow prints no surge rating for RIVER 3 Max (RIVER 3 Plus + Extra Battery 300). "Surge 1200W" is printed in the specifications table on the RIVER 3 Max store page, the table that gives "Capacity 286Wh", the RIVER 3 Plus unit's own capacity, so it is not a figure for this bundle. The RIVER 3 Series page prints "1200W X-Boost" for RIVER 3 Max, which the store page table lists separately from surge. Revised on 1 October 2026: EcoFlow prints this surge rating only for the RIVER 3 Plus unit, while this record is the RIVER 3 Max bundle of a RIVER 3 Plus and an Extra Battery 300.

Not documented

Converted: 572 Wh x 0.001 kWh/Wh = 0.572 kWh

Printed as "RIVER 3 Max 572Wh Capacity | 600W Output" on EcoFlow's RIVER 3 Series page for this kit (RIVER 3 Max, RIVER 3 Plus with Extra Battery 300). Converted from the printed watt-hours; nothing is added up from the parts.

Location: RIVER 3 Max model card

Converted