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 3.2. The EcoFlow RIVER 2 Max 500 leads on AC output and battery life. The EcoFlow TRAIL Plus 300 DC wins on portability. The EcoFlow TRAIL Plus 300 DC costs $130 less ($199 vs $329).
EcoFlow TRAIL Plus 300 DC
#24 in SmallFull review
A light DC-only station for campers who want a built-in light and app control. Choose the TRAIL 300 DC instead if long battery life matters more than weight.
Amazon $199$199
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)) and battery life (LiFePO4, 3,000 cycles vs NCM, 3-year warranty).
- Choose the EcoFlow TRAIL Plus 300 DC for portability (127 Wh per kg (5 lb (2.3 kg)) vs 83 Wh per kg (13.2 lb (6 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 2 Max 500 | EcoFlow TRAIL Plus 300 DC |
|---|---|---|
| Overall rating | 4.0/5 | 3.2/5 |
| Value 25% | 82 $0.66 per rated Wh | 79 $0.69 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 | 20 NCM, 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)) | 100 127 Wh per kg (5 lb (2.3 kg)) |
| Solar input 5% | 34 220 W max solar input | 27 110 W max solar input |
| Features 5% | 40 100 W USB-C, app | 40 140 W USB-C, app |
Specifications
| EcoFlow RIVER 2 Max 500 | EcoFlow TRAIL Plus 300 DC | |
|---|---|---|
| Battery | ||
| Rated capacity | 499 Wh | 288 Wh |
| Chemistry | LiFePO4 | NCM |
| 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 | - | 3 (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 lb (2.3 kg) |
| Dimensions | 10.6 x 10.2 x 7.7 in | 8.11 x 4.53 x 4.84 in |
| App | EcoFlow app (Wi-Fi and Bluetooth) | EcoFlow app |
| Warranty | - | 3 years |
| Released | 2022-11 | 2025-08 |