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 is the better portable power station overall, rated 4.0 to 3.5. The EcoFlow RIVER 2 Max 500 leads on AC output, battery life and features. The EcoFlow TRAIL 300 DC wins on portability and value. The EcoFlow TRAIL 300 DC costs $177.95 less ($151.05 vs $329).
EcoFlow TRAIL 300 DC
#17 in SmallFull review
A DC-only station for car camping with a 12V cooler and USB devices. Good value if you never need a wall outlet.
Amazon $151.05$151.05
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 2 Max 500 for AC output (500 W continuous AC vs No AC outlets (DC only)), battery life (LiFePO4, 3,000 cycles vs LiFePO4, 3-year warranty) and features (100 W USB-C, app vs 140 W USB-C).
- Choose the EcoFlow TRAIL 300 DC for portability (112 Wh per kg (5.7 lb (2.6 kg)) vs 83 Wh per kg (13.2 lb (6 kg))) and value ($0.52 per rated Wh vs $0.66 per rated Wh).
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 Max 500 | EcoFlow TRAIL 300 DC |
|---|---|---|
| Overall rating | 4.0/5 | 3.5/5 |
| Value 25% | 82 $0.66 per rated Wh | 94 $0.52 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 | 60 LiFePO4, 3-year warranty |
| AC output 15% | 72 500 W continuous AC | 0 No AC outlets (DC only) |
| 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)) | 100 112 Wh per kg (5.7 lb (2.6 kg)) |
| Solar input 5% | 34 220 W max solar input | 27 110 W max solar input |
| Features 5% | 40 100 W USB-C, app | 20 140 W USB-C |
Specifications
| EcoFlow RIVER 2 Max 500 | EcoFlow TRAIL 300 DC | |
|---|---|---|
| Battery | ||
| Rated capacity | 499 Wh | 288 Wh |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | - |
| Expandable | No | No |
| Output | ||
| AC output | 500 W (1,000 W surge) | None (DC only) |
| Boost mode (resistive loads) | 1,000 W | - |
| AC outlets | 4 total | 0 |
| 120V 15A outlets (NEMA 5-15R) | 2 | - |
| 120V 2-prong outlets (NEMA 1-15R) | 2 | - |
| 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 | - | No |
| Charging | ||
| AC charging | 660 W | - |
| Full AC charge time | 1 h | - |
| Max solar input | 220 W | 110 W |
| Solar input voltage | 11-50V, 13A | - |
| Car charging | 100 W | 110 W |
| Build | ||
| Weight | 13.2 lb (6 kg) | 5.7 lb (2.6 kg) |
| Dimensions | 10.6 x 10.2 x 7.7 in | 6.57 x 4.53 x 6.54 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | - |
| Warranty | - | 3 years |
| Released | 2022-11 | 2025-08 |