EcoFlow RIVER 3: Runtime & Specs

By Hicham M. · Specs from EcoFlow's published documents, as of September 2026 · How we calculate

The EcoFlow RIVER 3 is a 245 Wh LiFePO4 power station with 300 W of continuous AC output and a 600 W surge rating.

Capacity245 WhLiFePO4

Output300 W600 W surge

Solar input110 W11–30 V

Weight7.7 lbnot expandable

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How long will the RIVER 3 run your appliances?

Nonstop runtime for one device at a time, using typical US wattages and 85% inverter efficiency. Devices marked ✕ can't run on this model.

Estimated runtime by appliance for the EcoFlow RIVER 3
Device	Avg draw	Runtime
LED light bulb	9 W	23 hours
Phone charging	10 W	22 hours
Wi-Fi router + modem	15 W	14 hours
Laptop	50 W	4.2 hours
CPAP (no humidifier)	30 W	6.9 hours
CPAP with heated humidifier	60 W	3.5 hours
Starlink Standard	90 W	2.3 hours
TV	100 W	2.1 hours
Mini fridge	29 W	7.2 hours
Refrigerator	58 W	Can’t start it
Chest freezer	29 W	Can’t start it
Sump pump (1/3 HP)	160 W	Not enough output
Sump pump (1/2 HP)	210 W	Not enough output
Window AC	225 W	Not enough output
Drip coffee maker	1,000 W	Not enough output
Microwave	1,500 W	Not enough output
Space heater	750 W	Not enough output
Well pump	33 W	Needs 240 V

Fridges, freezers, pumps and AC units cycle on and off, so we use their average draw. Want a mix of devices on a schedule? Use the runtime calculator.

What the RIVER 3 can't power

Refrigerator (full-size, ENERGY STAR): needs about 1,200 W to start
Refrigerator (older full-size, 1990s–early 2000s): needs about 1,600 W to start
Chest freezer (7–15 cu ft): needs about 800 W to start
Upright freezer (frost-free, 13–20 cu ft): needs about 1,000 W to start
Microwave (1,000 W cooking power): needs 1,500 W running
Drip coffee maker (10–12 cup): needs 1,000 W running
Electric kettle (1.7 L): needs 1,500 W running
Toaster (2–4 slice): needs 1,000 W running
Induction burner (single, portable): needs 1,500 W running
Electric pressure cooker (6 qt, Instant Pot type): needs 1,000 W running
Blender (countertop): needs 400 W running
Rice cooker (5.5–6 cup): needs 600 W running
Window AC (5,000 BTU): needs 450 W running
Window AC (8,000 BTU): needs 700 W running
Space heater (portable, 1,500 W): needs 1,500 W running
Dehumidifier (50-pint): needs 490 W running
Gas furnace blower fan: needs 600 W running
Oxygen concentrator (home, 5 L/min): needs 310 W running
Sump pump (1/3 HP): needs 800 W running
Sump pump (1/2 HP): needs 1,050 W running
Well pump (1/2 HP submersible): needs 240 V
Washing machine: needs 500 W running
Garage door opener: needs 720 W running
Circular saw (7-1/4 in.): needs 1,400 W running
EV Level 1 charging (120 V, 12 A): needs 1,440 W running

Solar charging time

Hours of good sun to charge from empty, assuming panels deliver 75% of their rating.

Panels	Power in	Hours of sun
100 W of panels	75 W	3.3 hours
110 W of panels	83 W	3 hours

Check panel voltage and wiring with the solar charging calculator.

Full specifications

Battery capacity	245 Wh
Battery chemistry	LiFePO4 (LFP)
Continuous AC output	300 W
Surge (peak) output	600 W
X-Boost (heating devices)	600 W
AC voltage	120V
AC outlets	2
USB-C ports	1 (up to 100 W)
USB-A ports	2
12 V car outlet	Yes
Max solar input	110 W
Solar voltage range	11–30 V
Solar max current	8 A
Max AC charging power	320 W
AC charging time (maker claim)	0–100% in ~60 min (AC)
Expandable	No
UPS / EPS switchover	20 ms
Cycle life	3,000 cycles (to 80%)
Weight	7.7 lb
Warranty	2 years

Notes: Pure sine wave. The 20ms switchover is EPS; only the separate RIVER 3 (10 ms UPS) variant is a true UPS. EcoFlow US now sells the RIVER 3 Max instead; the product page is EcoFlow Canada's (120V).

Specs from EcoFlow's published documents, as of September 2026. Found an error? Tell us.

Sources

Similar power stations

Questions

How long will the EcoFlow RIVER 3 run a refrigerator?

It may not: a typical fridge compressor needs about 1,200 W for a moment to start, above this model's 600 W surge rating. Newer, smaller fridges may start fine.

Can the EcoFlow RIVER 3 run a microwave?

Not a full-size one. A typical 1,000 W microwave pulls about 1,500 W from the outlet, more than its 300 W continuous output. Its X-Boost mode is meant for simple heating devices, and microwaves may not work properly with it.

How long does the EcoFlow RIVER 3 take to charge?

EcoFlow's published charging claim: “0–100% in ~60 min (AC)”. Max AC charging power is 320 W. With solar, it accepts up to 110 W. With 110 W of panels that's roughly 3 hours of good sun from empty.

Is the EcoFlow RIVER 3 expandable?

No. Its capacity is fixed at 245 Wh.

Does the EcoFlow RIVER 3 work as a UPS?

EcoFlow lists a 20 ms switchover time, so it can keep devices like routers and computers running when the power drops. Check that your specific device tolerates the switch before relying on it for anything critical.