Main trade-off
Anker SOLIX C300
Normal AC output is limited to 300 W.
Head-to-head
Anker SOLIX C300 vs EcoFlow RIVER 3 Plus: RIVER doubles rated AC output without doubling stored energy
The short answer
Choose C300 for small-device trips where recharging the station from a compatible USB-C charger is useful. Choose RIVER 3 Plus for a running load above 300 W, stronger solar input or a later expansion battery. Their base capacities are almost identical, despite EcoFlow having twice the rated AC output.
Before you choose
The reasoning and the trade-offs
A 450 W appliance changes the answer
A steady 450 W load is 150 W above C300's normal AC rating. RIVER 3 Plus leaves 150 W below its 600 W rating. That makes EcoFlow the candidate, provided startup demand and the appliance instructions also fit.
What this is based on
450 - 300 = 150 W above C300. 600 - 450 = 150 W below RIVER 3 Plus. Special boost modes are excluded.
Main trade-off
EcoFlow RIVER 3 Plus
The base battery remains only 286 Wh.
Anker SOLIX C300
- Choose it for
- Recharge the AC-model station through its 140 W USB-C input
- Keep a small-device setup within 300 W
- Main trade-off
- Normal AC output is limited to 300 W.
EcoFlow RIVER 3 Plus
- Choose it for
- Run a supported appliance between 300 and 600 W
- Add a matching battery later instead of replacing the station
- Main trade-off
- The base battery remains only 286 Wh.
About this comparison
Anker C300 AC vs EcoFlow RIVER 3 Plus for laptop charging, small appliances and camping. Compare the real 300 W and 600 W limits, solar and expansion.
Choose C300 for small-device trips where recharging the station from a compatible USB-C charger is useful. Choose RIVER 3 Plus for a running load above 300 W, stronger solar input or a later expansion battery. Their base capacities are almost identical, despite EcoFlow having twice the rated AC output.
Winner by situation
Start with what you need it to do
I travel with a compatible USB-C charger
C300 accepts USB-C input directly. EcoFlow documents that input on its optional extra battery.
- Anker SOLIX C300
- Better fit
- EcoFlow RIVER 3 Plus
- Depends
My appliance draws 450 W while running
EcoFlow covers the steady load below 600 W. Check startup and compatibility separately.
- Anker SOLIX C300
- Not suitable
- EcoFlow RIVER 3 Plus
- Depends
I may need more stored energy later
RIVER 3 Plus has two documented matching expansion-battery options.
- Anker SOLIX C300
- Caution
- EcoFlow RIVER 3 Plus
- Better fit
I use one small solar panel below 100 W
A compatible panel below 100 W does not use EcoFlow's higher input ceiling.
- Anker SOLIX C300
- Good
- EcoFlow RIVER 3 Plus
- Good
What matters in practice
The differences that matter
A 450 W appliance changes the answer
A steady 450 W load is 150 W above C300's normal AC rating. RIVER 3 Plus leaves 150 W below its 600 W rating. That makes EcoFlow the candidate, provided startup demand and the appliance instructions also fit.
How we reached this conclusion
450 - 300 = 150 W above C300. 600 - 450 = 150 W below RIVER 3 Plus. Special boost modes are excluded.
Twice the output does not mean twice the trip length
EcoFlow can run a larger load, but its base battery stores 2 Wh less. At the same load, these capacity labels provide almost no reason to expect different endurance. Using the extra output can empty a small battery sooner.
How we reached this conclusion
288 - 286 = 2 Wh. 2 / 288 × 100 = 0.69%. Rated output differs by 600 / 300 = 2, while nominal capacity is nearly equal.
The expansion option changes the next purchase
Adding EB300 brings RIVER 3 Plus to 572 Wh. EB600 brings it to 858 Wh. Both options retain the same 600 W inverter limit. Buy an extra battery to store more energy, not to run a higher-wattage appliance.
How we reached this conclusion
286 + 286 = 572 Wh. 286 + 572 = 858 Wh. The documented RIVER 3 Plus rated AC output remains 600 W.
Choice A
Anker SOLIX, A1722
C300
A 288Wh LFP station with a 300W inverter, 140W two-way USB-C and a genuinely carryable vertical body.
- Best matched use
- Recharge the AC-model station through its 140 W USB-C input
Checked facts
- Base battery capacity: 288 Wh
- Normal rated AC output: 300 W
- Solar input ceiling: 100 W
- USB-C recharging of the station: Up to 140 W through the supported input/output port
Choice B
EcoFlow, RIVER 3 Plus
RIVER 3 Plus
A toaster-size 286Wh station with 600W rated output, sub-10ms transfer and stack-on expansion to 858Wh.
- Best matched use
- Run a supported appliance between 300 and 600 W
Checked facts
- Base battery capacity: 286 Wh
- Normal rated AC output: 600 W
- Solar input ceiling: 220 W
- USB-C recharging of the station: 140 W input documented on the optional extra battery
Meaningful differences
What changes the fit
| What changes | Anker SOLIX C300 | EcoFlow RIVER 3 Plus | Why it matters |
|---|---|---|---|
| Base battery capacity | 288 Wh | 286 Wh | A 2 Wh difference is too small to make a useful runtime recommendation. |
| Normal rated AC output | 300 W | 600 W | RIVER 3 Plus has twice the normal inverter capacity. C300 surge figures are not continuous output. |
| Solar input ceiling | 100 W | 220 W | EcoFlow has more room for a larger compatible panel. |
| USB-C recharging of the station | Up to 140 W through the supported input/output port | 140 W input documented on the optional extra battery | Do not attribute the expansion battery's USB-C input to the bare RIVER 3 Plus unit. |
| Expansion route | No matching expansion battery connection documented | EB300 or EB600 | EcoFlow supports 572 Wh or 858 Wh total capacity with the appropriate extra battery. |
| AC outlets on the US unit | 3 | 3 | Socket count is shared. The combined power limit differs. |
What you give up
Every choice has a cost
If you choose Anker SOLIX C300
- Solar input stops at 100 W.
If you choose EcoFlow RIVER 3 Plus
- The extra battery and its USB-C input are separate from the bare station purchase.
Recommendation switch
The decision flips if...
A supported load needs more than 300 W
Choose EcoFlow RIVER 3 Plus. RIVER 3 Plus raises normal rated AC output to 600 W.
Direct USB-C recharging of the bare station matters
Choose Anker SOLIX C300. C300 has a documented 140 W USB-C input/output port.
My appliance needs more than 600 W of normal output
Choose neither. Both fall below that requirement without relying on special boost behavior.
What matters in practice
How to make the call
Choose the AC version deliberately
Anker sells C300 and C300 DC, which are different products. This page compares the C300 with AC sockets. Check the selected Amazon model before buying. A lower-priced DC-only unit cannot replace it if one of your devices requires an ordinary wall-style outlet.
Keep the small battery in perspective
A 600 W inverter gives RIVER 3 Plus more appliance options, but the base battery remains under 300 Wh. That is useful for brief tasks and modest loads. For an all-day job, calculate energy use from the actual operating time and allow for losses before assuming the bigger wattage label is enough.
Budget the full expansion bundle
RIVER 3 Plus, RIVER 3 Max and RIVER 3 Max Plus describe different battery configurations. Compare the bare unit with the bare unit, then price the extra battery separately if needed. The larger bundle also changes what you carry and where it fits.
What this comparison cannot tell you
- These comparisons use US-model specifications. Load examples are calculations, not hands-on runtime tests. Check startup demand, port limits and the appliance instructions before connecting equipment.
- Quoted battery capacity is nominal stored energy. Usable output is lower and depends on conversion losses, standby use, temperature and battery condition. A transfer-time claim does not certify critical-equipment compatibility.
What the facts say
What the comparison shows
Useful conclusions from the current portable power stations comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Anker SOLIX C300 |
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| |
| EcoFlow RIVER 3 Plus |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Anker SOLIX C300
Recharge the AC-model station through its 140 W USB-C input
See price & reviews on AmazonEcoFlow RIVER 3 Plus
Run a supported appliance between 300 and 600 W
See price & reviews on AmazonLinks open in a new tab.