EcoFlow DELTA Pro 3
76BatteryRank score · Excellent
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EcoFlow DELTA Pro 3 vs EcoFlow DELTA Pro Ultra X
Decision readout
Better station
EcoFlow DELTA Pro 3 takes capacity and output, EcoFlow DELTA Pro Ultra X takes warranty and track record — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to EcoFlow DELTA Pro Ultra X by 4 points — a hair, not a mandate.
- powerEcoFlow DELTA Pro 3+9
- trustEcoFlow DELTA Pro Ultra X+23
- livabilityEcoFlow DELTA Pro Ultra X+12
EcoFlow DELTA Pro Ultra X
80BatteryRank score · Excellent
What changes the decision
- Home backup: EcoFlow DELTA Pro 3 — stronger combined capacity and AC-output score
- Camping & RV: EcoFlow DELTA Pro Ultra X — lighter and easier to carry
By the BatteryRank Engineering Team
01 · Score evidence
Score breakdown
76
EcoFlow DELTA Pro 3
Overall
80
EcoFlow DELTA Pro Ultra X
87
POWER
EcoFlow DELTA Pro 3 +9
78
Battery-side usable capacity and how much you can run at once.
74
TRUST
EcoFlow DELTA Pro Ultra X +23
97
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
89
Wall and solar recharge speed.
27
LIVABILITY
EcoFlow DELTA Pro Ultra X +12
39
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 Pro 3
Rated (on the box)
4,096 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC deliveredmeasured
3,790 Wh. Show source
verified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-043790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated · 7% below the label
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 Pro 3 | EcoFlow DELTA Pro Ultra X | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 52.6 nights | about 145.1 nights | 9 W · |
| CPAP (heated humidifier on) | about 8.5 nights | about 23.3 nights | 56 W · |
| Refrigerator (full-size) | about 60 hours | about 166 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 211 hours | about 580 hours | 18 W · |
| Laptop (65W charger) | about 117 hours | about 321 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 189 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 Pro 3 | EcoFlow DELTA Pro Ultra X |
|---|---|---|
| AC-delivered capacity | 3,790 Whverified. Show sourceverified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-04 | 10,445 Whest.. Show sourceestimated sourceus.ecoflow.com ↗2026-07-04 |
| Continuous power output | 4,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 12,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Surge power output | 8,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | — |
| Max solar input | 2,600 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 10,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Weight | 51.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 135.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 |
| Rated cycle life | 4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | — |
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 Pro 3 #1 of 10 in Best for RV & Van Life · #2 XL / home backup in Best Portable Power Stations
- EcoFlow DELTA Pro Ultra X #1 XL / home backup in Best Portable Power Stations · #1 of 8 in Best for Home Backup
Where to buy
Affiliate links: we may earn a commission if you buy, at no extra cost to you. Commission never affects our rankings.
EcoFlow DELTA Pro 3
EcoFlow DELTA Pro Ultra X
Quick answers
- Is the EcoFlow DELTA Pro 3 better than the EcoFlow DELTA Pro Ultra X?
- EcoFlow DELTA Pro 3 takes capacity and output, EcoFlow DELTA Pro Ultra X takes warranty and track record — the decision is which of those you need, not overall quality. If neither is your constraint, the composite tiebreak goes to EcoFlow DELTA Pro Ultra X by 4 points — a hair, not a mandate.
- Which has more usable capacity, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra X?
- The EcoFlow DELTA Pro Ultra X, by 6,655 Wh — 3,790 Wh versus 10,445 Wh, a 176% advantage. At a 60 W load that is roughly 110.9 extra hours before the battery is empty. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices, which is always less than the number on the box.
- Which has more AC output, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra X?
- The EcoFlow DELTA Pro Ultra X: 4,000 W versus 12,000 W continuous. That gap matters only if a load sits between the two numbers — below 4,000 W both run it, above 12,000 W neither does. Only the EcoFlow DELTA Pro 3 publishes a sourced surge figure (8,000 W); the EcoFlow DELTA Pro Ultra X has no sourced surge figure, so startup capability is only half-answered here — check the missing side before planning around a motor or compressor load.
- How does runtime compare between the EcoFlow DELTA Pro 3 and EcoFlow DELTA Pro Ultra X?
- On the same sourced load — a refrigerator (full-size) — the EcoFlow DELTA Pro Ultra X runs longer: 165.8 hours against 60.2. These are planning estimates from each model's AC-delivered capacity, not stopwatch tests; real duty cycle and temperature move them.
- Which is lighter, the EcoFlow DELTA Pro 3 or EcoFlow DELTA Pro Ultra X?
- The EcoFlow DELTA Pro 3, by 84 kg (51.5 kg versus 135.5 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 EcoFlow DELTA Pro 3 for home backup; the EcoFlow DELTA Pro Ultra X for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
- Are the EcoFlow DELTA Pro 3 and EcoFlow DELTA Pro Ultra X from the same lineup?
- Yes — same manufacturer, so warranty terms, app, accessory ecosystem, and expansion batteries are usually shared. That narrows the decision to the hardware differences above rather than to which company you want to buy into.
Keep deciding
- Full scorecard, specs & price for EcoFlow DELTA Pro 3 →
- Full scorecard, specs & price for EcoFlow DELTA Pro Ultra X →
- See more alternatives to EcoFlow DELTA Pro 3 →
- 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 →