EcoFlow DELTA 3 Ultra
59BatteryRank score · Balanced
$1,299as of
Good price← CompareCheck price on Amazon 
EcoFlow DELTA 3 Ultra vs EcoFlow DELTA Pro Ultra X
Decision readout
Better station
EcoFlow DELTA Pro Ultra X leads by 21 points overall.
Better buy today
No price call today — the performance leader has no tracked street price yet.
EcoFlow DELTA Pro Ultra X
80BatteryRank score · Excellent
No street price observed yet.
What changes the decision
- Home backup: EcoFlow DELTA Pro Ultra X — more AC-delivered capacity and higher AC output
- Camping & RV: EcoFlow DELTA 3 Ultra — lighter and easier to carry
01 · Score evidence
Score breakdown
59
EcoFlow DELTA 3 Ultra
Overall
80
EcoFlow DELTA Pro Ultra X
55
POWER
EcoFlow DELTA Pro Ultra X +24
79
Battery-side usable capacity and how much you can run at once.
61
TRUST
EcoFlow DELTA Pro Ultra X +36
97
Owner reputation, safety record, warranty, and build durability.
61
CHARGING
EcoFlow DELTA Pro Ultra X +25
86
Wall and solar recharge speed.
65
LIVABILITY
EcoFlow DELTA 3 Ultra +17
48
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 Ultra
Rated (on the box)
3,072 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
2,611 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.
EcoFlow DELTA Pro Ultra X
Rated (on the box)
12,288 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
10,445 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 Ultra | EcoFlow DELTA Pro Ultra X | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 36.3 nights | about 145.1 nights | 9 W · |
| CPAP (heated humidifier on) | about 5.8 nights | about 23.3 nights | 56 W · |
| Refrigerator (full-size) | about 41 hours | about 166 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 145 hours | about 580 hours | 18 W · |
| Laptop (65W charger) | about 80 hours | about 321 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 130 full charges | about 522 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 Ultra | EcoFlow DELTA Pro Ultra X |
|---|---|---|
| AC-delivered capacity | 2,611 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 | 10,445 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 3,600 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 12,000 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Surge power output | 7,200 W. Show sourceclaimed sourceus.ecoflow.com ↗ | — |
| Max solar input | 800 W. Show sourceclaimed sourceus.ecoflow.com ↗ | 10,000 W. Show sourceclaimed sourceus.ecoflow.com ↗ |
| AC charge time (0–100%) | 89 min. Show sourceclaimed sourceus.ecoflow.com ↗ | — |
| Weight | 32.7 kg. Show sourceclaimed sourceus.ecoflow.com ↗ | 135.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗ |
| Rated cycle life | 4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗ | — |
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.
05 · Tracked street price
Price & fair-price verdict
EcoFlow DELTA Pro Ultra X
No street price observed yet · $10,597 MSRP.
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- EcoFlow DELTA 3 Ultra #2 of 3 in Best 3,000 Wh Stations · #8 of 10 in Best Home-Office Backup Power Stations
- EcoFlow DELTA Pro Ultra X #1 XL / home backup in Best Portable Power Stations · #1 of 8 in Best for Home Backup
Quick answers
- Is the EcoFlow DELTA 3 Ultra better than the EcoFlow DELTA Pro Ultra X?
- EcoFlow DELTA Pro Ultra X leads by 21 points overall. No price call today — the performance leader has no tracked street price yet.
- How are these two power stations compared?
- Both are scored by the BatteryRank formula across four pillars — power, trust, charging, and livability — over sourced specs, owner reputation, and durability. Capacity scoring uses battery-side usable watt-hours; this page separately shows estimated or measured AC-delivered capacity. Price is shown against each model's own history, and the score is price-independent.
- Which has more usable capacity, the EcoFlow DELTA 3 Ultra or EcoFlow DELTA Pro Ultra X?
- Use the capacity-truth section for the model-specific comparison. It separates rated battery energy from estimated or independently measured AC-delivered energy, so nameplate watt-hours are not mistaken for outlet runtime.
- Which has more AC output, the EcoFlow DELTA 3 Ultra or EcoFlow DELTA Pro Ultra X?
- The key-differences table compares continuous inverter output and surge output when both sourced readings exist. A missing input stays N/A and never creates a winner.
- Which is lighter, the EcoFlow DELTA 3 Ultra or EcoFlow DELTA Pro Ultra X?
- The key-differences table marks the lighter station only when both manufacturer-sourced weight readings are present. Open each model dossier for dimensions and the full portability context.
- Which is the better price today, the EcoFlow DELTA 3 Ultra or EcoFlow DELTA Pro Ultra X?
- The decision dashboard evaluates each timestamped street price against that model's own tracked history. Price is separate from the quality score, and no deal claim appears without sufficient history.
- How does runtime compare between the EcoFlow DELTA 3 Ultra and EcoFlow DELTA Pro Ultra X?
- The runtime table uses the same sourced device loads and each model's AC-delivered capacity. Results are planning estimates, not hands-on tests, and appear only when both models have enough data.
- Which model should I buy for my use case?
- Use the persona-fit section as a starting point, then confirm required output, runtime, charging, portability, and today's price. BatteryRank declares a use-case winner only when both sides have the needed inputs.
Keep deciding
- Full scorecard, specs & price for EcoFlow DELTA 3 Ultra →
- Full scorecard, specs & price for EcoFlow DELTA Pro Ultra X →
- See more alternatives to EcoFlow DELTA 3 Ultra →
- See more alternatives to EcoFlow DELTA Pro Ultra X →
- 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 →