EcoFlow RIVER 3 Plus
#8 in SmallFull review
A compact LiFePO4 station for camping, laptop work and router/modem UPS duty, with the option to add capacity later.
Amazon $299$299
The EcoFlow RIVER 3 Plus is the better portable power station overall, rated 3.7 to 3.4. The EcoFlow RIVER 3 Plus leads on AC output, solar input and value. The Anker SOLIX C300 wins on tested capacity and portability. The EcoFlow RIVER 3 Plus costs $30.99 less ($299 vs $329.99).
Anker SOLIX C300
#20 in SmallFull review
For campers and travelers who mainly charge laptops, phones and cameras and want a few AC outlets in a small, light unit.
Amazon $329.99$329.99
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the EcoFlow RIVER 3 Plus for AC output (600 W continuous AC vs 300 W continuous AC), solar input (220 W max solar input vs 100 W max solar input) and value ($1.05 per rated Wh vs $1.15 per rated Wh).
- Choose the Anker SOLIX C300 for tested capacity (80% of rated capacity delivered (1 test) vs 76% of rated capacity delivered (1 test)) and portability (70 Wh per kg (9.1 lb (4.1 kg)) vs 61 Wh per kg (10.4 lb (4.7 kg))).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every small portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow RIVER 3 Plus | Anker SOLIX C300 |
|---|---|---|
| Overall rating | 3.7/5 | 3.4/5 |
| Value 25% | 48 $1.05 per rated Wh | 39 $1.15 per rated Wh |
| Tested capacity 15% | 28 76% of rated capacity delivered (1 test) | 45 80% of rated capacity delivered (1 test) |
| Battery life 15% | 91 LiFePO4, 3,000 cycles, 5-year warranty | 91 LiFePO4, 3,000 cycles, 5-year warranty |
| AC output 15% | 83 600 W continuous AC | 41 300 W continuous AC |
| Charging speed 10% | 95 0-100% on AC in 1 h | 93 0-100% on AC in 1 h 3 min |
| Portability 10% | 28 61 Wh per kg (10.4 lb (4.7 kg)) | 45 70 Wh per kg (9.1 lb (4.1 kg)) |
| Solar input 5% | 73 220 W max solar input | 23 100 W max solar input |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 75 UPS (10 ms), 140 W USB-C, app |
Independent capacity tests
EcoFlow RIVER 3 Plus
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| CNET | 218 Wh | 76.2% | 480W load logged with HOBOware; round-trip efficiency 72.41%; recharge from empty 1 h 12 min. |
Anker SOLIX C300
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 230 Wh | 80% | AC output test; load not stated in the review. Measured charging speed 274 Wh/hr. |
Specifications
| EcoFlow RIVER 3 Plus | Anker SOLIX C300 | |
|---|---|---|
| Battery | ||
| Rated capacity | 286 Wh | 288 Wh |
| Tested usable capacity | 218 Wh (76%) | 230 Wh (80%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | 3,000 to 80% |
| Expandable | Yes, up to 858 Wh | No |
| Output | ||
| AC output | 600 W (1,200 W surge) | 300 W (600 W surge) |
| Boost mode (resistive loads) | 1,200 W | - |
| AC outlets | 3 total | 3 total |
| 120V 15A outlets (NEMA 5-15R) | 3 | 3 |
| AC waveform | Pure sine wave | - |
| USB-C ports | 1 (100 W) | 3 (up to 140 W each) |
| USB-A ports | 2 | 1 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 0 |
| UPS / pass-through | Yes (10 ms switchover) | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 380 W | 330 W |
| Full AC charge time | 1 h | 1 h 3 min (measured by OutdoorGearLab; Anker states 80% in 50 minutes) |
| Max solar input | 220 W | 100 W |
| Solar input voltage | - | 11-28V |
| Car charging | 220 W | - |
| Build | ||
| Weight | 10.4 lb (4.7 kg) | 9.1 lb (4.1 kg) |
| Dimensions | 9.2 x 9.1 x 5.8 in | 6.46 x 6.34 x 9.45 in |
| App | Wi-Fi + Bluetooth | Anker app |
| Warranty | 5 years | 5 years |
| Released | 2025-03 | 2024-09 |