Anker SOLIX C300X DC Power Station vs EcoFlow RIVER 3 Plus Extra Battery
Buy the Anker SOLIX C300X if you want a standalone power station with about 300 W of output for laptops, lights and small appliances. Buy the EcoFlow River 3 Plus Smart Extra Battery only if you already own a River 3 Plus and want to extend its runtime. The Anker is the more useful first purchase for most shoppers. No prices were provided for either product, so compare live store prices on Deal.ai before buying.
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Anker SOLIX C300X DC Power Station
Anker SOLIX C300X DC Portable Power Station 288Wh
Choose the Anker SOLIX C300X if you need a self-contained 288Wh station that can run and charge devices directly at up to 300W.
- 300W output runs more devices than the EcoFlow's 140W
- Standalone station: no host unit needed
- 288Wh capacity suits laptops, phones and lights
- USB-PD charging for compatible devices
What separates them
| Anker SOLIX C300X DC Power Station | EcoFlow RIVER 3 Plus Extra Battery | |
|---|---|---|
| Role in a setup | Standalone power station with its own inverter and ports | Expansion battery designed to pair with a River 3 Plus |
| Rated output | 300W | 140W |
| Capacity | 288Wh | 286Wh |
| Battery chemistry | Not specified in the listing | LiFePO4 and Li-Ion |
| Weight | Not specified | 7.7 oz listed |
| Wireless charging | Not listed | Built-in wireless charging |
| Input voltage | Not specified | Up to 28V input |
| USB-C ports |
Price history
- Anker SOLIX C300X DC Power Station: lowest $199.99 on Nov 7.
- EcoFlow RIVER 3 Plus Extra Battery: lowest $208.99 on Nov 7 at Best Buy.
Prices at every store
EcoFlow RIVER 3 Plus Extra Battery
- Best BuyNew
Availability unknown
$208.99Checked Nov 7
Price via Klarna.
Specs compared
| Spec | Anker SOLIX C300X DC Power Station | EcoFlow RIVER 3 Plus Extra Battery |
|---|---|---|
| Connections | USB-C | USB-C |
| Type | Portable Power Station | Powerbank, Battery Holder, Chargers, Batteries,… |
| Color | Black | Gray, Black, Silver |
| Power Supply (W) | 300.0 | 140.0 |
| Features | USB-PD (USB power delivery) | Built-in Wireless Charging, USB-PD (USB power d… |
| Battery Technology | — | LiFePO4, Li-Ion |
| Lowest Output Voltage (V) | — | 5.0 |
| Highest Output Voltage (V) | — | 20.0 |
| Batteries | — | Power Tool Battery, Laptop Battery, Other Batte… |
| Power Connection |
What reviewers say
EcoFlow RIVER 3 Plus Extra Battery
Owner feedback on EcoFlow's RIVER expansion batteries is generally positive on build and capacity gains, with the main complaints about cost per watt-hour and the need to buy into the same ecosystem.
- CapacityPraisedOwners like that it roughly doubles runtime of the RIVER 3 Plus.
- BuildPraisedOwners describe the unit as solid and easy to stack on the main station.
- ValueCriticisedBuyers say the cost per Wh is steep next to a larger standalone station.
- CompatibilityMixed
Questions and answers
- Which is better for camping?
- The Anker SOLIX C300X. Its 300W output and standalone design let you run lights, a laptop and small devices without a host unit. The EcoFlow extra battery needs a River 3 Plus to work.
- Which lasts longer?
- The EcoFlow lists LiFePO4 cells, which typically handle more charge cycles than standard Li-Ion. The Anker's chemistry is not stated, so its cycle life is unknown from the listing.
- Can I use the EcoFlow on its own?
- No. It is an extra battery for the River 3 Plus, so it adds capacity to that station rather than replacing it.
- Is the Anker worth the extra?
- It depends on price and need. If you want one device that powers gear directly, the Anker's 300W output makes it the more capable buy. If you already own a River 3 Plus, the EcoFlow battery is the cheaper way to add runtime.
- Which has more ports?
- The Anker lists USB-C with USB-PD but does not give a port count. The EcoFlow lists one USB-C port plus wireless charging. Check the full port list before buying.
- Which is lighter?
- The EcoFlow lists 7.7 oz. The Anker's weight is not given, so it cannot be compared directly.
