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Corsair RM850x Shift — 850 W · Gold
Corsair

Corsair RM850x Shift

850 W · Gold

90
/ 100
From $179
VS
Corsair RM850x Shift wins by 2
EcoFlow Delta 2 — Portable power station · 2022
EcoFlow

EcoFlow Delta 2

Portable power station · 2022

88
/ 100
From $999
Specdex verdict

Corsair RM850x Shift takes it — here’s why.

In our weighted Specdex score, Corsair RM850x Shift lands at 90 and EcoFlow Delta 2 at 88. That puts Corsair RM850x Shift ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Corsair RM850x Shift if…

  • ✓Modular cabling on most
  • ✓ATX 3.1 / 12V-2x6 support
  • ✓10-year warranty on many

Pick EcoFlow Delta 2 if…

  • ✓LiFePO4 chemistry on modern SKUs (4000+ cycles)
  • ✓Solar input
  • ✓Multiple AC/DC/USB-C outputs
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Winner by scenario

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

Cables

EcoFlow Delta 2

Compared on the cables sub-score

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

Efficiency

Corsair RM850x Shift

Compared on the efficiency sub-score

Corsair RM850x Shift leads on efficiency (90 vs 83).

Noise

Tie

Compared on the noise sub-score

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

Value for money

Corsair RM850x Shift

Specdex score per dollar at MSRP

Corsair RM850x Shift more score per dollar ($179 vs $999).

Corsair RM850x Shift 90
vs
88 EcoFlow Delta 2

Score breakdown

Corsair RM850x Shift
90
efficiency 90
noise 86
cables 86
value 84
EcoFlow Delta 2
88
efficiency 83
noise 86
cables 90
value 80

Specs side-by-side

Corsair RM850x Shift versus EcoFlow Delta 2 — full spec comparison
Spec Corsair RM850x Shift EcoFlow Delta 2
Wattage
850 W
—
Efficiency
Gold
—
Type
—
Portable power station
Release year
—
2022

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

EcoFlow Delta 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)

FAQ: Corsair RM850x Shift vs EcoFlow Delta 2

Which is better, Corsair RM850x Shift or EcoFlow Delta 2? +

Corsair RM850x Shift scores 90 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.

Is Corsair RM850x Shift worth the price? +

At $179, Corsair RM850x Shift delivers a Specdex score of 90 — strongest in efficiency.

Is EcoFlow Delta 2 worth the price? +

At $999, EcoFlow Delta 2 delivers a Specdex score of 88 — strongest in cables.

Does Corsair RM850x Shift or EcoFlow Delta 2 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, Corsair RM850x Shift or EcoFlow Delta 2? +

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

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

Corsair RM850x Shift — leads on efficiency (90 vs 83). Compared on the efficiency sub-score.