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EcoFlow DELTA 3 Max vs Oupes Mega 2 Pro

EcoFlow DELTA 3 Max — front view

EcoFlow DELTA 3 Max

65BatteryRank score · Balanced
Check price on Amazon
Decision readout
Better station

Oupes Mega 2 Pro takes warranty and track record, EcoFlow DELTA 3 Max takes weight and noise — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to Oupes Mega 2 Pro by 4 points — a hair, not a mandate.

  • powerOupes Mega 2 Pro+6
    2,500 W vs 2,400 W continuous
  • trustOupes Mega 2 Pro+17
  • chargingOupes Mega 2 Pro+9
    1,000 W vs 500 W solar input
  • livabilityEcoFlow DELTA 3 Max+34
    20.3 kg vs 22.1 kg
Oupes Mega 2 Pro — front view

Oupes Mega 2 Pro

69BatteryRank score · Balanced
Check price on Amazon
What changes the decision

By the BatteryRank Engineering Team

01 · Score evidence

Score breakdown

65
EcoFlow DELTA 3 Max
Overall
69
Oupes Mega 2 Pro
66
POWER
Oupes Mega 2 Pro +6
72

Battery-side usable capacity and how much you can run at once.

67
TRUST
Oupes Mega 2 Pro +17
84

Owner reputation, safety record, warranty, and build durability.

55
CHARGING
Oupes Mega 2 Pro +9
64

Wall and solar recharge speed.

71
LIVABILITY
EcoFlow DELTA 3 Max +34
37

Lightweight, portable, and quiet enough to live with.

Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.

02 · Usable energy

Capacity truth

The watt-hours on the box aren't what reaches your devices. Same scale, both units.

EcoFlow DELTA 3 Max
Rated (on the box)
2,048 Wh. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04

The marketing number — total cell capacity.

AC delivered (est.)
1,741 Wh. Show sourceestimated sourceestimate = battery-side usable capacity × 85% inverter efficiency

What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.

Oupes Mega 2 Pro
Rated (on the box)
2,048 Wh. Show sourceclaimed sourceoupes.com ↗2026-07-27

The marketing number — total cell capacity.

AC delivered (est.)
1,741 Wh. Show sourceestimated sourceestimate = battery-side usable capacity × 85% inverter efficiency

What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.

03 · Same assumptions

Same-device runtime

Estimated runtime for the same sourced devices on EcoFlow DELTA 3 Max and Oupes Mega 2 Pro
DeviceEcoFlow DELTA 3 MaxOupes Mega 2 ProAssumption
CPAP (humidifier off)about 24.2 nightsabout 24.2 nights9 W ·
CPAP (heated humidifier on)about 3.9 nightsabout 3.9 nights56 W ·
Refrigerator (full-size)about 28 hoursabout 28 hours180 W × 35% duty cycle ·
Wi-Fi router + modemabout 97 hoursabout 97 hours18 W ·
Laptop (65W charger)about 54 hoursabout 54 hours65 W × 50% duty cycle ·
Phone (one full charge)about 87 full chargesabout 87 full charges20 W ·

One device at a time; estimates use each station's usable AC energy. Build your own load →

04 · Sourced hardware

Key specs, side by side

Key sourced specifications for EcoFlow DELTA 3 Max and Oupes Mega 2 Pro
SpecEcoFlow DELTA 3 MaxOupes Mega 2 Pro
AC-delivered capacity
1,741 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04
1,741 Whest.. Show sourceestimated sourceoupes.com ↗2026-07-27
Continuous power output
2,400 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
2,500 W. Show sourceclaimed sourceoupes.com ↗2026-07-27
Surge power output
4,800 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
3,800 W. Show sourceclaimed sourceoupes.com ↗2026-07-27
Max solar input
500 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
1,000 W. Show sourceclaimed sourceoupes.com ↗2026-07-27
AC charge time (0–100%)
68 min. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
—
Weight
20.3 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
22.1 kg. Show sourceclaimed sourceoupes.com ↗2026-07-27
Rated cycle life
4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04
4,000 cycles. Show sourceclaimed sourceoupes.com ↗2026-07-27
Only show differences
  • Continuous power output2,400 W2,500 W
  • Surge power output4,800 W3,800 W
  • Max solar input500 W1,000 W
  • AC charge time (0–100%)68 min—
  • Weight20.3 kg22.1 kg

Manufacturer figures unless marked verified or est. Tap or focus a figure to view its source. The better reading in each row is highlighted — lower wins for weight and recharge time.

Where these rank

Where to buy

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Quick answers

Is the EcoFlow DELTA 3 Max better than the Oupes Mega 2 Pro?
Oupes Mega 2 Pro takes warranty and track record, EcoFlow DELTA 3 Max takes weight and noise — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to Oupes Mega 2 Pro by 4 points — a hair, not a mandate.
Which has more usable capacity, the EcoFlow DELTA 3 Max or Oupes Mega 2 Pro?
Neither, in any way you would notice: 1,741 Wh against 1,741 Wh is a 0% gap, which is smaller than the swing you get from running the same load on a cold morning. Treat them as the same size and decide on output, weight, or today's price instead. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices.
Which has more AC output, the EcoFlow DELTA 3 Max or Oupes Mega 2 Pro?
The Oupes Mega 2 Pro: 2,400 W versus 2,500 W continuous. That gap matters only if a load sits between the two numbers — below 2,400 W both run it, above 2,500 W neither does. Surge headroom follows the same order: 4,800 W against 3,800 W, and surge is what decides whether a compressor or pump actually starts.
How does runtime compare between the EcoFlow DELTA 3 Max and Oupes Mega 2 Pro?
They run within 0% of each other on the same load — about 27.6 hours each on a refrigerator (full-size). Runtime will not separate these two; the deciding factor is somewhere else.
Which is lighter, the EcoFlow DELTA 3 Max or Oupes Mega 2 Pro?
The EcoFlow DELTA 3 Max, by 1.8 kg (20.3 kg versus 22.1 kg). Both weights are manufacturer figures for the bare unit; cables and a solar panel add to whatever you actually carry.
Which model should I buy for my use case?
On the sub-scores that describe each use case: the Oupes Mega 2 Pro for home backup; the EcoFlow DELTA 3 Max for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.

Keep deciding

Scores computed from sourced data · prices timestamped · tap or focus a figure to view its source

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