EcoFlow
EcoFlow River 2
Portable power station · 2022
82
/ 100
From $249
VS
Corsair RM850x Shift wins by 8
Corsair
Corsair RM850x Shift
850 W · Gold
90
/ 100
From $179
Specdex verdict
Corsair RM850x Shift takes it — here’s why.
In our weighted Specdex score, EcoFlow River 2 lands at 82 and Corsair RM850x Shift at 90. That puts Corsair RM850x Shift ahead by 8 points — a decisive margin driven mostly by its strengths in the categories below.
Pick EcoFlow River 2 if…
- ✓LiFePO4 chemistry on modern SKUs (4000+ cycles)
- ✓Solar input
- ✓Multiple AC/DC/USB-C outputs
Pick Corsair RM850x Shift if…
- ✓Modular cabling on most
- ✓ATX 3.1 / 12V-2x6 support
- ✓10-year warranty on many
EcoFlow River 2 82
vs 90 Corsair RM850x Shift
Score breakdown
EcoFlow River 2
82 efficiency 77
noise 86
cables 90
value 80
Corsair RM850x Shift
90 efficiency 90
noise 86
cables 86
value 84
Specs side-by-side
| Spec | EcoFlow River 2 | Corsair RM850x Shift |
|---|---|---|
| Type | Portable power station | — |
| Release year | 2022 | — |
| Wattage | — | 850 W |
| Efficiency | — | Gold |
EcoFlow River 2
Pros
- +LiFePO4 chemistry on modern SKUs (4000+ cycles)
- +Solar input
- +Multiple AC/DC/USB-C outputs
Cons
- −Heavy
- −Pricey per Wh
- −Shipping restrictions (Li-ion)
Corsair RM850x Shift
Pros
- +Modular cabling on most
- +ATX 3.1 / 12V-2x6 support
- +10-year warranty on many
Cons
- −Bulky on higher wattages
- −Fan noise varies by load
- −Cable length may not fit some cases
FAQ: EcoFlow River 2 vs Corsair RM850x Shift
Which is better, EcoFlow River 2 or Corsair RM850x Shift? +
Corsair RM850x Shift scores 90 on our weighted rubric — ahead by 8. Your best pick depends on the sub-scores above.
Is EcoFlow River 2 worth the price? +
At $249, EcoFlow River 2 delivers a Specdex score of 82 — strongest in cables.
Is Corsair RM850x Shift worth the price? +
At $179, Corsair RM850x Shift delivers a Specdex score of 90 — strongest in efficiency.
Does EcoFlow River 2 or Corsair RM850x Shift last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.