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EcoFlow River 2 — Portable power station · 2022
EcoFlow

EcoFlow River 2

Portable power station · 2022

82
/ 100
From $249
VS
Corsair RM850x Shift wins by 8
Corsair RM850x Shift — 850 W · Gold
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
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Cables

EcoFlow River 2

Compared on the cables sub-score

EcoFlow River 2 leads on cables (90 vs 86).

Noise

Tie

Compared on the noise sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Efficiency

Corsair RM850x Shift

Compared on the efficiency sub-score

Corsair RM850x Shift leads on efficiency (90 vs 77).

Value for money

Corsair RM850x Shift

Specdex score per dollar at MSRP

Corsair RM850x Shift more score per dollar ($179 vs $249).

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

EcoFlow River 2 versus Corsair RM850x Shift — full spec comparison
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.

Which is better for cables, EcoFlow River 2 or Corsair RM850x Shift? +

EcoFlow River 2 — leads on cables (90 vs 86). Compared on the cables sub-score.

Which is better for efficiency, EcoFlow River 2 or Corsair RM850x Shift? +

Corsair RM850x Shift — leads on efficiency (90 vs 77). Compared on the efficiency sub-score.