EcoFlow RIVER 2 240
#9 in SmallFull review
A small, quick-charging LiFePO4 station for phones, laptops, lights and a router during short outages. Fine for a weekend of camping without high-wattage appliances.
Amazon $198.99 EcoFlow $219$198.99
The EcoFlow RIVER 2 240 is the better portable power station overall, rated 3.7 to 3.3. The EcoFlow RIVER 2 240 leads on value, features and solar input. The EcoFlow RIVER 2 240 costs $61 less ($198.99 vs $259.99).
Anker 521 PowerHouse
#21 in SmallFull review
For campers and travelers who want a small, long-lived LiFePO4 battery for phones, laptops, lights and CPAP. Larger or faster-charging stations give more for the money if you need to run appliances.
Amazon $259.99 Anker SOLIX $259.99$259.99
Prices were last checked October 20, 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 2 240 for value ($0.82 per rated Wh vs $1.02 per rated Wh), features (UPS (30 ms), app vs no UPS, expansion or app) and solar input (110 W max solar input vs 65 W max solar input).
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 2 240 | Anker 521 PowerHouse |
|---|---|---|
| Overall rating | 3.7/5 | 3.3/5 |
| Value 25% | 68 $0.82 per rated Wh | 51 $1.02 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 91 LiFePO4, 3,000 cycles, 5-year warranty | 91 LiFePO4, 3,000 cycles, 5-year warranty |
| AC output 15% | 41 300 W continuous AC | 41 300 W continuous AC |
| Charging speed 10% | 95 0-100% on AC in 1 h | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 45 70 Wh per kg (7.7 lb (3.5 kg)) | 44 69 Wh per kg (8.2 lb (3.7 kg)) |
| Solar input 5% | 36 110 W max solar input | 12 65 W max solar input |
| Features 5% | 55 UPS (30 ms), app | 0 no UPS, expansion or app |
Specifications
| EcoFlow RIVER 2 240 | Anker 521 PowerHouse | |
|---|---|---|
| Battery | ||
| Rated capacity | 243 Wh | 256 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | 3,000 to 80% |
| Expandable | No | No |
| Output | ||
| AC output | 300 W (600 W surge) | 300 W (600 W surge) |
| Boost mode (resistive loads) | 600 W | - |
| AC outlets | 2 total | 2 total |
| 120V 15A outlets (NEMA 5-15R) | 1 | - |
| 120V 2-prong outlets (NEMA 1-15R) | 1 | 2 |
| USB-C ports | - | 1 (60 W) |
| USB-A ports | - | 2 |
| 12 V car outlet | Yes | Yes |
| UPS / pass-through | Yes (30 ms switchover) | - |
| Charging | ||
| AC charging | 360 W | 125 W |
| Full AC charge time | 1 h | - |
| Max solar input | 110 W | 65 W |
| Solar input voltage | 11-30V, 8A | 11-28V, 5.5A |
| Car charging | 100 W | - |
| Build | ||
| Weight | 7.7 lb (3.5 kg) | 8.2 lb (3.7 kg) |
| Dimensions | 9.6 x 8.5 x 5.7 in | 8.5 x 8.3 x 5.7 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | - |
| Warranty | 5 years | 5 years |