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EcoFlow Delta Pro — Portable power station · 2022
EcoFlow

EcoFlow Delta Pro

Portable power station · 2022

90
/ 100
From $3,299
VS
Corsair RM850x Shift — 850 W · Gold
Corsair

Corsair RM850x Shift

850 W · Gold

90
/ 100
From $179
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, EcoFlow Delta Pro lands at 90 and Corsair RM850x Shift at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick EcoFlow Delta Pro 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 Delta Pro

Compared on the cables sub-score

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

Efficiency

Corsair RM850x Shift

Compared on the efficiency sub-score

Corsair RM850x Shift leads on efficiency (90 vs 85).

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 $3,299).

EcoFlow Delta Pro 90
vs
90 Corsair RM850x Shift

Score breakdown

EcoFlow Delta Pro
90
efficiency 85
noise 86
cables 90
value 80
Corsair RM850x Shift
90
efficiency 90
noise 86
cables 86
value 84

Specs side-by-side

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

EcoFlow Delta Pro

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 Delta Pro vs Corsair RM850x Shift

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

Both score 90 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is EcoFlow Delta Pro worth the price? +

At $3,299, EcoFlow Delta Pro delivers a Specdex score of 90 — 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 Delta Pro 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 Delta Pro or Corsair RM850x Shift? +

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

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

Corsair RM850x Shift — leads on efficiency (90 vs 85). Compared on the efficiency sub-score.