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 $308.99 EcoFlow $329$308.99
The EcoFlow RIVER 2 Max 500 rates 4.0 among small portable power stations; the DJI Power 500 rates 3.7 among mid-size ones. The DJI Power 500 costs $9.99 less ($299 vs $308.99).
DJI Power 500
#31 in Mid-sizeFull review
A compact, quiet 512 Wh LFP station that suits DJI drone and camera users who mostly charge from the wall; buyers who want built-in solar input or a 12V socket should look elsewhere.
Amazon DJI $299$299
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.
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 | DJI Power 500 |
|---|---|---|
| Overall rating | 4.0/5 | 3.7/5 |
| Value 25% | 85 $0.62 per rated Wh | 69 $0.58 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 41 79% of rated capacity delivered (1 test) |
| Battery life 15% | 76 LiFePO4, 3,000 cycles | 100 LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 72 500 W continuous AC | 44 1,000 W continuous AC |
| Charging speed 10% | 95 0-100% on AC in 1 h | 89 0-100% on AC in 1 h 10 min |
| Portability 10% | 70 83 Wh per kg (13.2 lb (6 kg)) | 46 70 Wh per kg (16.1 lb (7.3 kg)) |
| Solar input 5% | 34 220 W max solar input | 51 300 W max solar input |
| Features 5% | 40 100 W USB-C, app | 55 UPS (20 ms), 100 W USB-C |
Independent capacity tests
EcoFlow RIVER 2 Max 500
No independent test published yet.
DJI Power 500
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 79% | 905W load ran 27 minutes against about 33 minutes expected from the rated 512 Wh. AC recharge from empty took 83 minutes. |
Specifications
| EcoFlow RIVER 2 Max 500 | DJI Power 500 | |
|---|---|---|
| Battery | ||
| Rated capacity | 499 Wh | 512 Wh |
| Tested usable capacity | - | 404 Wh (79%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,000 to 80% | 4,000 to 70%+ |
| Expandable | No | No |
| Output | ||
| AC output | 500 W (1,000 W surge) | 1,000 W |
| Boost mode (resistive loads) | 1,000 W | - |
| AC outlets | 4 total | 2 total |
| 120V 15A outlets (NEMA 5-15R) | 2 | 2 |
| 120V 2-prong outlets (NEMA 1-15R) | 2 | - |
| USB-C ports | - | 2 (up to 100 W each) |
| USB-A ports | - | 2 |
| 12 V car outlet | Yes | No |
| DC5521 ports | - | 0 |
| UPS / pass-through | - | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 660 W | - |
| Full AC charge time | 1 h | 1 h 10 min (0-80% in 50 min (manufacturer); The Solar Lab measured 83 min to full) |
| Max solar input | 220 W | 300 W |
| Solar input voltage | 11-50V, 13A | - |
| Car charging | 100 W | - |
| Build | ||
| Weight | 13.2 lb (6 kg) | 16.1 lb (7.3 kg) |
| Dimensions | 10.6 x 10.2 x 7.7 in | 305 x 207 x 177 mm |
| App | EcoFlow app (Wi-Fi and Bluetooth) | - |
| Warranty | - | 5 years |