EcoFlow RIVER 2 Pro: Runtime & Specs

Q: How long will the EcoFlow RIVER 2 Pro run a refrigerator?

About 11 hours for a typical ENERGY STAR full-size fridge averaging 58 W, assuming 85% inverter efficiency. Older or larger fridges use more. Try your own numbers.

Q: Can the EcoFlow RIVER 2 Pro 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 800 W continuous output. Its X-Boost mode is meant for simple heating devices, and microwaves may not work properly with it.

Q: How many amp-hours is the EcoFlow RIVER 2 Pro?

The EcoFlow RIVER 2 Pro works out to about 64 Ah at 12 V, or 60 Ah at 12.8 V, the nominal voltage of a 12 V LiFePO4 battery. Both are our conversion of EcoFlow's 768 Wh rating: amp-hours = watt-hours ÷ volts. EcoFlow's manual lists the battery itself as 40 Ah at 19.2 V, the same energy at a higher voltage. For scale, a 12 V 100 Ah LiFePO4 battery holds 1,280 Wh, so this model holds about 60% as much as one. How we convert amp-hours.

Q: How long does the EcoFlow RIVER 2 Pro take to charge?

EcoFlow's published charging claim: “0–100% in 70 min”. Max AC charging power is 940 W. With solar, it accepts up to 220 W. With 220 W of panels that's roughly 4.7 hours of good sun from empty.

Q: Is the EcoFlow RIVER 2 Pro expandable?

No. Its capacity is fixed at 768 Wh.

Q: Does the EcoFlow RIVER 2 Pro work as a UPS?

EcoFlow lists a 30 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.

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

The EcoFlow RIVER 2 Pro is a 768 Wh LiFePO4 power station with 800 W of continuous AC output and a 1,600 W surge rating. It runs a typical full-size fridge for about 11 hours. It has been replaced or discontinued, but many are still in use.

Capacity768 WhLiFePO4

Output800 W1,600 W surge

Solar input220 W11–50 V

Weight18.2 lbnot expandable

Check price on Amazon View at EcoFlow Calculate runtime for your devices

We may earn a commission if you buy through these links. It never changes our numbers, and every model in our database is included whether or not it pays us. Learn more.

Our notes

The RIVER 2 Pro packs 768 Wh into 18.2 lb, about 42 Wh per pound, the best ratio of any model under 1 kWh in our database. It runs a CPAP without humidifier for about 22 hours, so two or three nights depending on how long you sleep.

Its limits are the 800 W output and the solar input. It runs a full-size fridge (about 11 hours) and a 1/3 HP sump pump, but not a 1/2 HP sump pump, a microwave or a coffee maker. Solar input is capped at 220 W, so a full recharge from panels takes most of a sunny day.

EcoFlow lists a switchover under 30 ms. Many routers and laptops ride through that, but some desktop computers may not. It can't take an extra battery. EcoFlow US shows it as sold out, so most buyers will find it used or refurbished.

Simulated runtimes (not measured)

Nobody tested this unit for this page. These figures come from a computer simulation of the RIVER 2 Pro, and they are estimates. The plain runtime table below divides energy by average draw at 85% efficiency. The simulation also charges the battery for the power the inverter burns just by being switched on, which is why small loads come out shorter. Where we have measured a unit, the measurement is shown separately and labeled as measured.

Simulated runtimes for the EcoFlow RIVER 2 Pro
Device	Spec-sheet math	Simulated, typical	Likely range	Simulated at 0 °C
Wi-Fi router + modem	44 hours	25 hours	22 hours to 30 hours	21 hours
CPAP (no humidifier)	22 hours	16 hours	15 hours to 18 hours	14 hours
Starlink Standard	7.3 hours	6.7 hours	6.3 hours to 7 hours	5.7 hours
Refrigerator (full-size, ENERGY STAR)	11 hours	9.7 hours	9 hours to 10 hours	8.2 hours

Nonstop runtime from full to battery cutoff. Likely range = middle 80% of 200 simulated runs with the uncertain inputs varied. The inverter idle draw is assumed, not published: we assumed about 13 W for this model, varied from 8 to 19 W. If the real figure is lower, real runtimes land closer to the spec-sheet column.

How this was simulated

The battery is stepped down every 2 minutes until it reaches cutoff, for 200 runs per device. Results are seeded, so the page shows the same numbers on every build.
Battery draw = load + inverter idle draw + 4–8% of the load + a loss that rises with load squared (4% at full output).
Usable capacity = 92–98% of rated Wh, for protection cutoff and aging.
At 0 °C, 80–90% of that capacity is assumed available.
Fridges cycle on and off every 30–50 minutes at the share of the time set by their average draw. The inverter idle draw continues while the compressor is off.
Devices that exceed this model's output or surge rating are left out. Loads are US 120 V devices.

These ranges are assumptions about a typical unit. They are not manufacturer figures for the EcoFlow RIVER 2 Pro. How we calculate · How we use AI

How long will the RIVER 2 Pro 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 2 Pro
Device	Avg draw	Runtime
LED light bulb	9 W	3 days
Phone charging	10 W	2.9 days
Wi-Fi router + modem	15 W	44 hours
Laptop	50 W	13 hours
CPAP (no humidifier)	30 W	22 hours
CPAP with heated humidifier	60 W	11 hours
Starlink Standard	90 W	7.3 hours
TV	100 W	6.5 hours
Mini fridge	29 W	23 hours
Refrigerator	58 W	11 hours
Chest freezer	29 W	23 hours
Sump pump (1/3 HP)	160 W	4.1 hours
Sump pump (1/2 HP)	210 W	Not enough output
Window AC	225 W	2.9 hours
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 2 Pro can't power

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
Space heater (portable, 1,500 W): needs 1,500 W running
Sump pump (1/2 HP): needs 1,050 W running
Well pump (1/2 HP submersible): needs 240 V
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	10 hours
200 W of panels	150 W	5.1 hours
220 W of panels	165 W	4.7 hours

Check panel voltage and wiring with the solar charging calculator.

Full specifications

Battery capacity	768 Wh
Amp-hours at 12 V (converted) How we convert	64 Ah (60 Ah at 12.8 V)
Battery pack voltage	19.2 V (40 Ah at this voltage)
Battery chemistry LFP vs NMC	LiFePO4 (LFP)
Continuous AC output	800 W
Surge (peak) output	1,600 W
X-Boost (heating devices)	1,600 W
AC voltage	120V
AC outlets	—
USB-C ports	—
USB-A ports	—
12 V car outlet	—
Max solar input	220 W
Solar voltage range	11–50 V
Solar max current	13 A
Max AC charging power	940 W
AC charging time (maker claim)	0–100% in 70 min
Expandable	No
UPS / EPS switchover What this means	30 ms
Cycle life What this means	3,000 cycles (to 80%)
Weight	18.2 lb
Warranty	5 years

Notes: Port counts and car outlet not itemized on EcoFlow US spec table (DC out 12.6V 10A/3A/3A). No extra-battery support listed. EPS <30ms. Sold out on EcoFlow US.

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 2 Pro run a refrigerator?

About 11 hours for a typical ENERGY STAR full-size fridge averaging 58 W, assuming 85% inverter efficiency. Older or larger fridges use more. Try your own numbers.

Can the EcoFlow RIVER 2 Pro 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 800 W continuous output. Its X-Boost mode is meant for simple heating devices, and microwaves may not work properly with it.

How many amp-hours is the EcoFlow RIVER 2 Pro?

The EcoFlow RIVER 2 Pro works out to about 64 Ah at 12 V, or 60 Ah at 12.8 V, the nominal voltage of a 12 V LiFePO4 battery. Both are our conversion of EcoFlow's 768 Wh rating: amp-hours = watt-hours ÷ volts. EcoFlow's manual lists the battery itself as 40 Ah at 19.2 V, the same energy at a higher voltage. For scale, a 12 V 100 Ah LiFePO4 battery holds 1,280 Wh, so this model holds about 60% as much as one. How we convert amp-hours.

How long does the EcoFlow RIVER 2 Pro take to charge?

EcoFlow's published charging claim: “0–100% in 70 min”. Max AC charging power is 940 W. With solar, it accepts up to 220 W. With 220 W of panels that's roughly 4.7 hours of good sun from empty.

Is the EcoFlow RIVER 2 Pro expandable?

No. Its capacity is fixed at 768 Wh.

Does the EcoFlow RIVER 2 Pro work as a UPS?

EcoFlow lists a 30 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.