EcoFlow RIVER 3 Plus vs. Anker SOLIX C300

For most buyers choosing between the EcoFlow RIVER 3 Plus and the Anker SOLIX C300, the RIVER 3 Plus is the better pick. The C300 is the better pick only for a buyer who wants strong USB-C charging and the lightest carry. Both stations hold almost the same energy, at 286 Wh and 288 Wh.

This comparison draws on the makers’ published specs, current in November 2026. Neither station was tested by PowerPicked Editorial.

How do their specs compare?

Wh is short for watt-hour, a measure of stored energy. W is short for watt, a measure of power. AC output is the power sent to devices that plug in. Solar input is the most power a station can accept from panels.

The two stations hold almost the same energy, with a gap of only 2 Wh. The RIVER 3 Plus gives 300 W more AC output, at 600 W against 300 W. The C300 is the lighter station, at 9.1 lb against 10.4 lb, a gap of 1.3 lb.

Which station suits you?

The RIVER 3 Plus fits a buyer who mainly charges phones and laptops or keeps Wi-Fi on, and wants a station that is easy to carry. The C300 fits a camper or a commuter who charges phones, laptops, and cameras most of the time and wants a small 9 lb box.

What does the RIVER 3 Plus offer?

The RIVER 3 Plus gives 600 W of AC output, which is twice the C300’s 300 W. It charges from AC in 1 hour. It is easy to carry at 10.4 lb. It can expand to 858 Wh, so its capacity can grow past 286 Wh.

Best for more output and expansion

EcoFlow RIVER 3 Plus

Capacity

286 Wh

AC output

600 W

AC charge

1 hour

Weight

10.4 lb

Who it's for: People who mainly charge phones and laptops or keep Wi-Fi on, and want a station that's easy to carry.

Strengths

• Easy to carry at 10.4 lb
• Expandable to 858 Wh
• Listed at under 30 dB

Weaknesses

• Small capacity for high-power devices
• 600 W limits what you can run

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It is listed at under 30 dB. A decibel, written dB, measures sound level. Its 600 W output limits what it can run, so a device that needs more than 600 W would not run. Its capacity is small for high-power devices.

A solar input figure for the RIVER 3 Plus is not listed in the reference files, so this guide does not give one. A battery type for the RIVER 3 Plus is not listed either, so this guide does not name one.

This section’s numbers assume 85% of the listed capacity reaches your devices. On that basis, the RIVER 3 Plus gives about 243.1 Wh, from 286 Wh times 0.85. A 100 W load runs for about 2.4 hours on that amount. The RIVER 3 Plus holds about 27.5 Wh for each pound, from 286 Wh over 10.4 lb.

To read the full RIVER 3 Plus review on its own, see the EcoFlow RIVER 3 Plus review.

What does the Anker SOLIX C300 offer?

The C300 has two 140 W USB-C ports. USB-C is a type of charging port. It also has one 15 W USB-C port, one 12 W USB-A port, plus a 120 W car outlet. The battery is LiFePO4, with a rating of more than 3,000 cycles to 80% capacity. One cycle means a full charge and discharge.

Best for USB-C charging and light carry

Anker SOLIX C300

Capacity

288 Wh

AC output

300 W

Solar input

100 W

Weight

9.1 lb

Who it's for: Campers and commuters who mainly charge phones, laptops, and cameras and want a small 9 lb box.

Strengths

• Two 140 W USB-C ports
• Rated 3,000+ cycles to 80%
• 10 ms UPS switchover

Weaknesses

• 300 W AC output limits what it can run
• Solar input tops out at 100 W

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Its AC output of 300 W can run only low-power devices. It switches to battery in 10 ms in UPS mode. UPS is short for uninterruptible power supply. That keeps a plugged-in device running when wall power stops.

Solar input ends at 100 W. The warranty lasts 5 years. An app connects through Wi-Fi and Bluetooth. Its operating range is -4°F to 104°F.

The numbers here assume 85% of the listed capacity reaches your devices. From 288 Wh times 0.85, the C300 gives about 244.8 Wh of usable energy. A 100 W load would run for about 2.4 hours on that amount. Per pound, the C300 holds about 31.6 Wh, from 288 Wh over 9.1 lb.

To read the full C300 review on its own, see the Anker SOLIX C300 review.

How to choose

First, weigh output. The RIVER 3 Plus gives 600 W and the C300 gives 300 W. Pick the RIVER 3 Plus if a device needs more than 300 W.

Second, weigh USB-C charging. The C300 gives you two 140 W USB-C ports. Pick the C300 if USB-C charging matters most to you.

Third, weigh expansion. The RIVER 3 Plus can expand to 858 Wh. An expansion figure for the C300 is not listed in the reference files. Pick the RIVER 3 Plus if you plan to add capacity later.

FAQ

Which one gives you more AC output?

The EcoFlow RIVER 3 Plus gives you more AC output. It gives 600 W, while the Anker SOLIX C300 gives 300 W. The gap is 300 W.

Which one is easier to carry?

The Anker SOLIX C300 is easier to carry. It weighs 9.1 lb, while the EcoFlow RIVER 3 Plus weighs 10.4 lb. The gap is 1.3 lb.

Which station can add capacity?

The EcoFlow RIVER 3 Plus can add capacity. It can expand to 858 Wh. An expansion figure for the Anker SOLIX C300 is not listed in the reference files.

Which station lists a solar input figure?

The Anker SOLIX C300 lists a solar input figure. It lists 100 W of solar input. A solar input figure for the EcoFlow RIVER 3 Plus is not listed in the reference files.