EcoFlow RIVER MaxvsYoshino B660 SST
Head-to-head comparison of scores, specs, and features.
Winner
EcoFlow RIVER Max
60.5Grade B
Price
$599.00
AC Power
600W
Yoshino B660 SST
60.0Grade B-
Price
$549.00
AC Power
660W
EcoFlow RIVER Maxwins by0.51points overall.
The Verdict
Overall take
Buy EcoFlow RIVER Max if
- Better Expandable Capacity: Yes vs No
- Better Energy Density Wh Per Kg: 74.8 vs 35.6
- Better Weight: 7.7 vs 16.9
Buy Yoshino B660 SST if
- Better Ups Functionality: Yes vs EPS
- Better Battery Lifespan Cycles: 4000 vs 500
- Better Warranty: 5 vs 2
Top 3 Key Differences
Expandable Capacity
Yesvs No
Score: 100 vs 0
Ups Functionality
EPSvs Yes
Score: 0 vs 100
Battery Lifespan Cycles
500vs 4000
Score: 30 vs 100
Performance by Category
ChargingTie
EcoFlow RIVER Max
85.0
Yoshino B660 SST
85.0
AC PowerTie
EcoFlow RIVER Max
61.0
Yoshino B660 SST
59.7
ConnectivityTie
EcoFlow RIVER Max
75.0
Yoshino B660 SST
75.0
PriceYoshino B660 SST wins
EcoFlow RIVER Max
78.6
Yoshino B660 SST
82.7
BatteryEcoFlow RIVER Max wins
EcoFlow RIVER Max
48.6
Yoshino B660 SST
42.0
PhysicalEcoFlow RIVER Max wins
EcoFlow RIVER Max
93.5
Yoshino B660 SST
70.9
Advanced FeaturesYoshino B660 SST wins
EcoFlow RIVER Max
21.5
Yoshino B660 SST
58.9
WarrantyYoshino B660 SST wins
EcoFlow RIVER Max
51.0
Yoshino B660 SST
100.0
Full Technical Specifications
| Feature | EcoFlow RIVER Max | Yoshino B660 SST |
|---|---|---|
| Charging | ||
| Ac Charge Speed | 96 | 120 |
| Charger Type | X-Stream AC charging (500W max with 576Wh); also car adapter and solar | AC adapter (DC In), Car (12V), Solar (XT60/MC4), USB-C PD |
| Fast Charging | Yes | Yes |
| Max Solar Input | 200 | 100 |
| Max Solar Panels | 2 | 1 |
| Pass Through Charging | Yes | Yes |
| Smart Charging | Yes | Yes |
| Solar Connector Type | MC4 to XT60 adapter cable | MC4 to XT60 (XT60 port) |
| Solar Panel Compatibility | Up to 2x 110W solar panels (10-25V, 12A max) | Yoshino SP100 (12-30VDC) |
| AC Power | ||
| Ac Output Amps | 5A max | 3 outlets, 120VAC, 60Hz (pure sine wave) |
| Ac Power Continuous | 600 | 660 |
| Ac Power Surge | 1200 | 900 |
| Ac Wave Quality | Pure Sine Wave | Pure Sine Wave |
| Connectivity | ||
| App Control | Yes | Yes |
| Bluetooth | Yes | Yes |
| Wifi Connectivity | Yes | Yes |
| Wireless Charging | No | No |
| Price | ||
| Base Price | 599.00 | 549.00 |
| Cost Per Wh | 1.04 | 0.91 |
| Price Description | Legacy/discontinued product. Sold out on brand site. Price shown is last listed retail price. Includes removable 288Wh extra battery. | Sale $549 (reg. $699) |
| Battery | ||
| Battery Capacity Wh | 576 | 602 |
| Battery Lifespan Cycles | 500 | 4000 |
| Expandable Capacity | Yes | No |
| Extra Battery Capacity | 288 | — |
| Max Extra Batteries | 1 | 0 |
| Product Info | ||
| Brand | EcoFlow | Yoshino |
| Model Name | RIVER Max | B660 SST |
| Product Url | https://us.ecoflow.com/products/river-max-portable-power-station | https://yoshinopower.com/products/b660-solid-state-portable-power-station |
| DC Power | ||
| Dc Output | Car: 13.6V/10A (136W); DC5521 x2: 13.6V/3A each | 12V DC: 2 ports 12.6VDC/10A (126W total); USB-C: 20W; USB-C PD: 100W; USB-A: 2 ports 12W each |
| Physical | ||
| Dimensions | 28.9 x 18.4 x 23.5 cm | 29.7 x 20.3 x 25.4 cm |
| Energy Density Wh Per Kg | 74.8 | 35.6 |
| Noise Level | — | 38 dB |
| Operating Temp | Charge: 0-45°C; Discharge: -20 to 45°C | Discharge: 14 to 140F (-10 to 60C); Charge: 32 to 131F (0 to 55C) |
| Portable | Yes | Yes |
| Weight | 7.7 kg · 17 lbs | 16.9 kg · 37.3 lbs |
| Advanced Features | ||
| Parallel Expansion | No | No |
| Ups Functionality | EPS | Yes |
| Ups Switch Time | 30 | 20ms |
| Warranty | ||
| Warranty | 2 | 5 |