EcoFlow RIVER 2 Max 500
#2 in SmallFull review
A 500Wh LiFePO4 station for camping, CPAP and short power outages. A good middle step between the small RIVER models and the DELTA line.
Amazon $329$329
The EcoFlow RIVER 2 Max 500 rates 4.0 among small portable power stations; the OUPES Exodus 700 rates 3.7 among mid-size ones. The OUPES Exodus 700 costs $19.01 less ($309.99 vs $329).
OUPES Exodus 700
#32 in Mid-sizeFull review
A compact mid-size LiFePO4 station for camping and short outages, with a long warranty and a useful 140W USB-C port.
Amazon $309.99$309.99
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.
Scores side by side
These two sit in different size classes (small and mid-size), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | EcoFlow RIVER 2 Max 500 | OUPES Exodus 700 |
|---|---|---|
| Overall rating | 4.0/5 | 3.7/5 |
| Value 25% | 82 $0.66 per rated Wh | 75 $0.54 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% | 76 LiFePO4, 3,000 cycles | 100 LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 72 500 W continuous AC | 21 700 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% | 70 83 Wh per kg (13.2 lb (6 kg)) | 84 91 Wh per kg (13.9 lb (6.3 kg)) |
| Solar input 5% | 34 220 W max solar input | 31 240 W max solar input |
| Features 5% | 40 100 W USB-C, app | 75 UPS (10 ms), 140 W USB-C, app |
Specifications
| EcoFlow RIVER 2 Max 500 | OUPES Exodus 700 | |
|---|---|---|
| Battery | ||
| Rated capacity | 499 Wh | 576 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | 4,000 4000+ cycles to 80% |
| Expandable | No | No |
| Output | ||
| AC output | 500 W (1,000 W surge) | 700 W (1,200 W surge) |
| Boost mode (resistive loads) | 1,000 W | - |
| AC outlets | 4 total | 2 total |
| 120V 15A outlets (NEMA 5-15R) | 2 | - |
| 120V 20A outlets (NEMA 5-20R) | - | 1 |
| 120V 2-prong outlets (NEMA 1-15R) | 2 | 1 |
| AC waveform | Pure sine wave | - |
| USB-C ports | - | 2 (up to 140 W each) |
| USB-A ports | - | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | - | 0 |
| UPS / pass-through | - | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 660 W | 400 W |
| Full AC charge time | 1 h | - |
| Max solar input | 220 W | 240 W |
| Solar input voltage | 11-50V, 13A | 12-35V |
| Car charging | 100 W | 96 W |
| Build | ||
| Weight | 13.2 lb (6 kg) | 13.9 lb (6.3 kg) |
| Dimensions | 10.6 x 10.2 x 7.7 in | 9.6 x 9.1 x 7.3 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | OUPES app (Wi-Fi/Bluetooth) |
| Warranty | - | 5 years |
| Released | 2022-11 | 2026-08 |