EcoFlow DELTA 3 Max Plus (2048Wh)
68BatteryRank score · Balanced
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EcoFlow DELTA 3 Max Plus (2048Wh) vs Oupes Mega 2 Pro
Decision readout
Better station
These two match on everything except recharge speed, and that goes to Oupes Mega 2 Pro.
- chargingOupes Mega 2 Pro+5
Oupes Mega 2 Pro
69BatteryRank score · Balanced
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What changes the decision
- Home backup: EcoFlow DELTA 3 Max Plus (2048Wh) — higher AC output
- Camping & RV: EcoFlow DELTA 3 Max Plus (2048Wh) — lighter and easier to carry
By the BatteryRank Engineering Team
01 · Score evidence
Score breakdown
68
EcoFlow DELTA 3 Max Plus (2048Wh)
Overall
69
Oupes Mega 2 Pro
77
POWER
EcoFlow DELTA 3 Max Plus (2048Wh) +5
72
Battery-side usable capacity and how much you can run at once.
N/A
TRUST
Incomplete data
84
Owner reputation, safety record, warranty, and build durability.
59
CHARGING
Oupes Mega 2 Pro +5
64
Wall and solar recharge speed.
39
LIVABILITY
EcoFlow DELTA 3 Max Plus (2048Wh) +2
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 Plus (2048Wh)
Rated (on the box)
2,048 Wh. Show source
claimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specsThe marketing number — total cell capacity.
AC delivered (est.)
1,741 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat 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 source
claimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048whThe marketing number — total cell capacity.
AC delivered (est.)
1,741 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
03 · Same assumptions
Same-device runtime
| Device | EcoFlow DELTA 3 Max Plus (2048Wh) | Oupes Mega 2 Pro | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 24.2 nights | about 24.2 nights | 9 W · |
| CPAP (heated humidifier on) | about 3.9 nights | about 3.9 nights | 56 W · |
| Refrigerator (full-size) | about 28 hours | about 28 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 97 hours | about 97 hours | 18 W · |
| Laptop (65W charger) | about 54 hours | about 54 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 87 full charges | about 87 full charges | 20 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
| Spec | EcoFlow DELTA 3 Max Plus (2048Wh) | Oupes Mega 2 Pro |
|---|---|---|
| AC-delivered capacity | 1,741 Whest.. Show sourceestimated sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 1,741 Whest.. Show sourceestimated sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
| Continuous power output | 3,000 W. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 2,500 W. Show sourceclaimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
| Surge power output | 6,000 W. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 3,800 W. Show sourceclaimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
| Max solar input | 1,000 W. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 1,000 W. Show sourceclaimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
| Weight | 22.1 kg. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 22.1 kg. Show sourceclaimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
| Rated cycle life | — | 4,000 cycles. Show sourceclaimed sourceoupes.com2026-07-27https://oupes.com/products/oupes-mega-2-pro-home-backup-portable-power-station-2500w-2048wh |
Only show differences
- Continuous power output3,000 W2,500 W
- Surge power output6,000 W3,800 W
- Rated cycle life—4,000 cycles
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
- EcoFlow DELTA 3 Max Plus (2048Wh) #6 of 10 in Best 2,000 Wh Stations · #6 of 10 in Best Power Stations for Apartment Outages
- Oupes Mega 2 Pro #3 Large (2 kWh class) in Best Portable Power Stations · #3 of 10 in Best 2,000 Wh Stations
Quick answers
- Is the EcoFlow DELTA 3 Max Plus (2048Wh) better than the Oupes Mega 2 Pro?
- These two match on everything except recharge speed, and that goes to Oupes Mega 2 Pro.
- Which has more usable capacity, the EcoFlow DELTA 3 Max Plus (2048Wh) 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 Plus (2048Wh) or Oupes Mega 2 Pro?
- The EcoFlow DELTA 3 Max Plus (2048Wh): 3,000 W versus 2,500 W continuous. That gap matters only if a load sits between the two numbers — below 2,500 W both run it, above 3,000 W neither does. Surge headroom follows the same order: 6,000 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 Plus (2048Wh) 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 Plus (2048Wh) or Oupes Mega 2 Pro?
- They are effectively the same to carry — 22.1 kg against 22.1 kg. Neither is meaningfully easier to move, so portability should not decide this one.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the EcoFlow DELTA 3 Max Plus (2048Wh) for home backup, camping & rv. One model leads every use case we score here, which makes this an unusually clean choice.
Keep deciding
- Full scorecard, specs & price for EcoFlow DELTA 3 Max Plus (2048Wh) →
- Full scorecard, specs & price for Oupes Mega 2 Pro →
- See more alternatives to EcoFlow DELTA 3 Max Plus (2048Wh) →
- See more alternatives to Oupes Mega 2 Pro →
- What size do you need? →
- Browse all rankings →
- Check device runtime evidence →
- Compare outage and trip load plans →
- Browse complete power kits →
- Capacity vs output explained →
- Battery cycle-life thresholds →
- UPS behavior explained →